Service Center X-ray Diffraction

Tasks and goals of the service center

The Service Center X-ray diffraction offers single crystal and powder X-ray diffraction experiments as central service. It is included into research and teaching in the chemistry department and adjacent disciplines. It supplys the necessary databases and programs needed for the data evaluation and representation.

- Single crystal X-ray diffraction
  
  more Single crystal X-ray diffraction
- Powder X-ray diffraction
  
  more Powder X-ray diffraction

► Single crystal X-ray diffraction

Employee Service Center X-ray Diffraction - single crystal X-ray diffraction

Dr. Bernd Morgenstern
Campus C4.1
Room 3.01
Tel.: ++49/ 681/ 302-64073
E-Mail

With the establishment of the Service Center for X-ray Diffraction, the possibility to conduct single crystal X-ray diffraction experiments is now possible as central service for all groups on campus, surrounding research centers and in the industry.

This method allows the determination of the (molecular) solid state structure for the position and realtive arrangement of the individual atoms. For this, diffraction patterns of the crystal are recorded, from which the electron distribution can be extracted via Fourier synthesis.

Via this technique, the unambiguous proof the spacial atomic arrangement can be conducted, given a suitable single crystal exists.

Possibilities

The service offered ranges from the selection of suitable single crystals to the recording of a data set to the evaluation of the data along with the representation if the data as tables and drawings for publication.

Two single crystal X-ray diffractometers are available in the Service Center. An older Bruker X8 ApexII with CCD detector and a newer Bruker D8 Venture with a micro focus source for both Mo- and Cu-radiation. The more efficient X-ray source along with an advanced detector technology enables a rapid data acquisition and the measurement of significantly smaller single crystals. The permanent availability of Cu-radiation allows a determination if the "absolute configuration" of enantiomeric pure organic compounds. Both instruments are equipped with a cryogenic device for structure detemination down to 100 K

The quality of the data set and the linked quality of the structure solution and refinement are not only tied to the instrument but also significantly to the grade of the selected crystal. Enhancing the crystals quality during the crystallization step will be rewarded. However, since both instruments are equipped with area detectors, the tolerance with respect to lower quality crystals is enhanced. Therefore a preliminary structure determination is even possible on these specimens with the results, however, not being publishable.

An up to date license for the Cambridge Structural Database is available and allows the comparison of collected data with published results as well as statistical data evaluation.

Structure determination of biomolecules (protein crystallography) is not possible in the Service Center.

► Powder X-ray diffraction

Employee Service Center X-ray Diffraction - powder X-ray diffraction

Dr. Oliver Janka
Campus C4.1
Room 4.01
Tel.: ++49/ 681/ 302-70665
E-Mail

Powder X-ray diffraction allows for a non-destructive investigation of (usually) crystalline samples. With its help, the purity of the sample or the present phases (phase analysis) along with lattice parameters of the identified and refined compounds can be evaluated. If a sample contains more than one phase, the respective ratios can be determined via Rietveld refinement. Besides plain phase analysis, also a microstructure analysis (crystallite size, texture, strain) can be carried out. In case of a known crystal structure, besides the lattice parameters also the atomic positions and the isotropic thermal displacement parameters can be determined. Finally, temperature dependent measurements allow the characterization of e.g. structural phase transitions.

Measurements

The Service Center supports the planning of measurements, conducts them, including sample preparation and also performs a full refinement of the measurement data. A briefing for independent use of the instruments is possible if an increased use is anticipated.

Infrastructure

There are currently two powder diffractometers available, all currently equipped with a Cu tube. In addition to the Bruker D8 ADVANCE diffractometer, which is mainly available for contract measurements, samples can also be measured on a PANalytical X'Pert Pro device. This can be equipped with a high-temperature chamber from mri (temperature range 300-1273 K).

Sensitive samples can be protected from the atmosphere either with the aid of a “dome” or by melting them into a capillary.

Numerous non-ambient options are also available for the Bruker D8:

Anton Paar Anton Paar high temperature chamber HTK1200N (300-1473 K, 1 bar)
Anton Paar reaction chamber XRK900 (300-1173 K, 10 bar); measurements under the influence of various gases (Ar, N2, O2) also possible at increased pressure (up to 10 bar) or in a dynamic vacuum
Anton Paar cryogenic chamber TTK600 (110-873 K, in vacuum)

Bruker D8 ADVANCE Diffractometer

Bragg-Brentano geometry, measuring range 2θ ca. 3,5-150°
Cu radiation (40 kV, 40 mA)
detector: Lynxeye 1D
primary beam path: variable divergence slits, Ni filter, soller collimator
secondary beam path: variable divergence slits, soller collimator
auto sampler (6 racks each 15 samples)
other equipment: Anton Paar high-temperature oven chamber HTK1200N (300-1473 K, 1 bar), Anton Paar reactor chamber XRK900 (300-1173 K, 10 bar), Anton Paar low temperature chamber TTK600 (110-873 K in vacuum), capillary sample holder

PANalytical X‘Pert Pro-MPD

Bragg-Brentano geometry, measuring range 2θ ca. 5-150°
Cu radiation (40 kV, 40 mA)
detector: PIXcel^1D
primary beam path: soller collimator (horizontal, 0,02 o. 0,04 rad), variable divergence slit
secondary beam path: soller collimator (horizontal, 0,02 o. 0,04 rad), variable anti-scatter slit
other equipment: Anton Paar high-temperature oven chamber HTK1200N (300-1473 K, 1 bar) – not in use

User regulations, measurement orders & process

User regulations

For all measurements performed in the X-ray diffraction service center, the new user regulations will apply from February 1_st 2021.
These can be dowloaded here (version of January 27^th 2021).

Measurement applications

As of February 1^st 2021, a measurement application form must be filled out for measurements and submitted with the samples.
Form for single crystal diffraction measurements
Form for powder diffraction measurements

Measurement procedure

As far as possible, the samples are processed in the order in which they are received. However, the expertise of the operator decides on the specific sequence. Please clarify the measurement conditions in advance by e-mail.
single crystal X-ray diffraction: scxrd(at)uni-saarland.de
powder X-ray diffraction: pxrd(at)uni-saarland.de

Sample drop-off

Single crystal X-ray diffraction:
Samples can be dropped off in building C4.1, room 3.01. Please call beforehand and bring the completed measurement form.
Since only a small single crystal is needed, the sample quantity is usually small. However, a larger quantity of crystals should be available for selection, since the quality of the crystal is directly proportional to the result. Material that is not needed is returned.
It is advantageous to leave the crystals in the solution. In other words, condense only until crystals form and then deliver well sealed. Solvent molecules are often included in the lattice, which easily escape due to their weak bonding, which then leads to the disintegration of the crystals. In addition, impurities still in the solution can cause the crystals to stick to the vessel wall after the solvent has been completely removed. As a result, they can no longer be removed undamaged. The size of the vessel should be in reasonably rational proportion to the amount of sample. It is no pleasure to fish out a few tiny crystals from a large flask, which are then still sitting almost unreachably on the side of the wall.
There are special procedures for substances that are sensitive to air and moisture. The procedure is agreed on a case-by-case basis.

Powder diffraction:
Samples can be dropped off in building C4.1, room 4.01. Please make an appointment in advance and bring the measurement application form completely filled out.
The required sample quantity depends on the substance class and the desired measurement method. Details will be clarified in the preliminary discussion.
There are special procedures for substances that are sensitive to air and moisture. Here, too, the procedure will be discussed on a case-by-case basis.

Publications

In the case of publications, the contributions of the service center are to be considered according to scientific practice. All manuscripts containing X-ray powder data measured at the Service Center must be submitted for review. In this way, factual errors related to the presentation of the data can be avoided. Figures as well as a crystallographic summary (cif file - Crystallographic Information File) will be provided.
Successful publications or patents based on results of the services provided must be communicated to the responsible persons of the service center.

Text blocks for powder X-ray diffraction experiments - PDF - docx

The DFG funding titles should also be mentioned in the acknowledgements:

INST 256/349-1 - Bruker D8 Advance powder diffractometer
INST 256/506-1 - Bruker D8 Venture single crystal diffractometer

► Further information and services

Lectures at Saarland University

The following lectures and classes focus (partially) on X-ray diffraction:

Festkörperchemie und Strukturchemie (solid state and structural chemistry, AC05), winter term, held by Prof. Kickelbick and Dr. Janka
Strukturchemie und Kristallographie (structural chemistry and crystallography, AC10), winter term, held by Prof. Kickelbick and Dr. Janka
Praktikum Kristallographie und Strukturchemie (lab class: crystallography and structural chemistry, ACK), winter term, held by Dr. Janka

Databases and programs

The service center for X-ray diffraction offers access to the CSD (The Cambridge Structural Database) and the Pearson database. In these, structural data of organic and metal-organic or coordination compounds and inorganic (solid state) compounds are deposited. In addition a powder diffraction database (PDF-2) is available.
For graphical representation and structural investigations, acces to the programs Diamond, Mercury and Platon is available.

Publications with contributions of the service center

2024

104	M. Veith, T. Kirs, B. Morgenstern, V. Huch: Structural Studies of Piperidino-Alanes with Halide, Amide and Hydride as further Ligands at Aluminum Zeitschrist für anorganische und allgemeine Chemie, 2024, 650, e2024000090 DOI: 10.1002/zaac.202400090
103	F. Dankert, J. Messelberger, U. Authesserre, A. Swain, D. Scheschkewitz, B. Morgenstern, D. Munz: A Lead(II) Substituted Triplet Carbene J. Am. Chem. Soc. 2024, 146, 29630−29636. doi:org/10.1021/jacs.4c10205
102	E. C. J. Gießelmann, S. Engel, S. Pohl, M. Briesenick, L. P. Rüthing, C. Kloos, A. Koldemir, L. Schumacher, J. Wiethölter, J. Schmedt auf der Günne, G. Kickelbick, O. Janka: Rapid synthesis of a green emitting phosphor by sulfidation of intermetallic EuAl₂ and its use in a hybrid material Chem. Mater. 2024, accepted.
101	A. Michaely, C. Luckas, R. Haberkorn, G. Kickelbick: Highly Exothermic and Fast Mechanochemical Redox and Intercalation Reactions of V₂O₅ with Sodium Hydride. Inorg. Chem. 2024, 63, 8099-8108. [DOI: 10.1021/acs.inorgchem.4c00200]
100	C. Odenwald, L. Niedner, R. Haberkorn, T. Sauerwald, O. Brieger, M. Nadig, G. Kickelbick: Continuous Microreactor-Based Synthesis of SnO₂ Nanoparticles for Sensor Applications Z. Anorg. Allg. Chem. 2024, e202400145. [DOI: 10.1002/zaac.202400145]
99	E. C. J. Gießelmann, G. Kickelbick, O. Janka: Changing the reaction pathway of the CaAl₂ oxidation using ball milling Dalton Trans. 2024, accepted.
98	A.-L. Thömmes, T. Büttner, B. Morgenstern, O. Janka, G. Kickelbick, B.-J. Niebuur, T. Kraus, M. Gallei, D. Scheschkewitz: Near-infinite-chain polymers with Ge=Ge double bonds Angew. Chem. Int. Ed. 2024, e202415103. [DOI: 10.1002/anie.202415103]
97	M. A. Mohamed, O. Janka, S. Harling, G. Kickelbick: Precursor-Based Syntheses of Mo(C,N,O)_x, Molybdenum Carbide, Nitride and Oxide Applying a Microjet Reactor Solids 2024, 5, 443-459. [DOI: 10.3390/solids5030030]
96	J. A. Baldauf, J. Kösters, O. Janka, R. Pöttgen: Ta₁₁Pt₄ - A new coloring variant of the sigma-phase Z. Kristallogr. 2024, ahead of print. [DOI: 10.1515/zkri-2024-0094]
95	T. Rittner, J. Kim, A. Haben, R. Kautenburger, O. Janka, J. Kim, M. Gallei: One-pot Functionalization for the Preparation of Cobaltocene-Modified Redox-Responsive Porous Microparticles Chem. Eur. J. 2024, 30, e202402338. [DOI: 10.1002/chem.202402338]
94	S. Heinz, L. Gemmer, O. Janka, M. Gallei: Ferrocene-Modified Polyacrylonitrile-Containing Block Copolymers as Preceramic Materials polymers 2024, 16, 2142. [DOI: 10.3390/polym16152142]
93	F. Eustermann, F. Stegemann, O. Janka: Synthesis, Physical, and Magnetocaloric Properties of MgZn₂‑Type Gd₂Al₃Rh Inorg. Chem. 2024, 63, 14086–14092. [DOI: 10.1021/acs.inorgchem.4c01887]
92	S. Engel, M. Koch, O. Janka: Nominal CaAl₂Pt₂ and Ca₂Al₃Pt – two new intermetallic compounds in the ternary system Ca–Al–Pt Z. Anorg. Allg. Chem. 2024, 650, e202400094. [DOI: 10.1002/zaac.202400094]
91	M. Radzieowski, E. C. J. Gießelmann, S. Engel, O. Janka: Structure, Physical and ²⁷Al NMR Spectroscopic Properties of the Missing Members of the Equiatomic REAlRh (RE = Sm, Tb, Dy, Er, and Lu) series Z. Naturforsch. 2024, 79b, 459-467. [DOI: 10.1515/znb-2024-0053]
90	S. Engel, E. C. J. Gießelmann, L. Schumacher, Y. Zhang, F. Müller, O. Janka: Synthesis, Magnetic and NMR spectroscopic properties of the MAl₅Pt₃ series (M = Ca, Y, La-Nd, Sm-Er) Dalton Trans. 2024, 53, 12176-12188. [DOI: 10.1039/d4dt01296h]
89	M. Fries. F. Schäfer, O. Janka. J. Schmauch, A. Jung: Influence of Heat Treatment on Microstructure Evolution and Yield Surfaces of Ni/PU Hybrid Foams Adv. Eng. Mater. 2024, 2400235. [DOI: 10.1002/adem.202400235]
88	K. Renner, F. Eustermann, O. Niehaus, O. Janka: Magnetic properties of the solid solutions CePt_1–_xAu_xAl (x = 0.1–0.9) Z. Naturforsch. 2024, 79b, 453-458. [DOI: 10.1515/znb-2024-0040]
87	S. Engel, O. Janka: New rare earth representatives adopting the Ce₂Al₁₆Pt₉-type structure Z. Naturforsch. 2024, 79b, accepted. [DOI: 10.1515/znb-2024-0022]
86	M. Ivanova, J. Zaharieva, M. Tsvetkov, V. Lozanova, B. Morgenstern, R. Lyapchev: 8-(2-Methoxyphenyl)-6-methyl-2-(1-methyl-1H-benzo[d]imidazol2-yl)quinolin Molbank, 2024, 2024, M1874.
85	M. Hunsicker, J. Krebs, M. Zimmer, B. Morgenstern, V. Huch, D. Scheschkewitz: Synthesis and Ligand Properties of Silsesquioxane-Caged Phosphite T7Ph7P Zeitschrift für Anorganische und Allgemeine Chemie, 2024, 650, e202400068 doi.org/10.1002/zaac.202400068
84	J. A. König, B. Morgenstern, J. Jauch: The Total Synthesis of Hyperfirin via a Cyclooctadiene Strategy Organic Letters, 2024, doi.org/10.1021/acs.orglett.4c01836
83	S. R. Lee, M. Dayras, J. Fricke, H. Guo, S. Balluff, F. Schalk, J. S. Yu, S. Y. Jeong, B. Morgenstern, B. Slippers, C. Beemelmanns, K. H. Kim: Molecular networking and computational NMR analyses uncover six polyketideterpene hybrids from termite-associated Xylaria isolates Communications Chemistry, 2024, 7, 129 doi.org/10.1038/s42004-024-01210-6
82	D. Elenkova, Y. Dimitrova, M. Tsvetkov , B. Morgenstern, M. Milanova, D. Todorovsky, J. Zaharieva: Investigation of the Sensing Properties of Lanthanoid Metal–Organic Frameworks (Ln-MOFs) with Terephthalic Acid Molecules, 2024, 29, 3713 doi.org/10.3390/molecules29153713
81	B. Borrisow, M. Tsvetkov, T. Zahariev, D. Elenkova, B. Morgenstern, D. Dimov, R. Kukeva, N. Trendafilova, I. Georgieva: Effect of Pyrrolidinedithiocarbamate Ligand on the Luminescence Properties of Heteroligand Samarium and Europium Complexes: Experimental and Theoretical Study Inorganic Chemistry, 2024, doi.org/10.1021/acs.inorgchem.4c00134
80	K. Breitwieser, M. Bevilacqua, S. Mullassery, F. Dankert, B. Morgenstern, S. Grandthyll, F. Müller, A. Biffis, C. Hering-Junghans, D. Munz: Pd₈(PDip)₆: Cubic, Unsuturated, Zerovalent: Advanced Science, 2024, 2400699. doi.org/10.1002/advs.202400699
79	M. Tsvetkov, D. Elenkova, M. Kolarski, R. Lyapchev, B. Morgenstern, V. Videva, J. Zaharieva, M. Milanova: Synthesis, crystal structure and luminescence properties of two novel Tb(III) complexes with 1,10-phenanthroline derivatives as ligands: Journal of Molecular Structure, 2024, 1314, 13876 doi.org/10.1016/j.molstruc.2024.138768
78	W. Hofer, F. Deschner, G. Jézéquel, L. P. de Carvalho, N. Abdel-Wadood, L. Pätzold, S. Bernecker, B. Morgenstern, A. M. Kany, M. Große, M. Stadler, M. Bischoff, A. K. H. Hirsch, J. Held, J. Herrmann, R. Müller: Functionalization of Chlorotonils: Dehalogenil as Promising Lead Compound for In Vivo Application Angewandte Chemie, Int. Ed. 2024, 63, e202319765. https://doi.org/10.1002/anie.202319765
77	I.-A. Bischoff, S. Danés, P. Thoni, D. M. Andrada, C. Müller, J. Lambert, B. Morgenstern, M. Zimmer, A. Schäfer: A lithium–aluminium heterobimetallic dimetallocene Nat. Chem. 2024, accepted. DOI: 10.1038/s41557-024-01531-y
76	E. C. J. Gießelmann, S. Engel, J. Baldauf, J. Kösterns, S. F. Matar, G. Kickelbick, O. Janka: Searching for Laves Phase Superstructures: Structural and ²⁷Al NMR spectroscopic investigations in the Hf-V-Al System Inorg. Chem. 2024, accepted. DOI: 10.1021/acs.inorgchem.4c00391
75	L. Giarrana, M. Zimmer, B. Morgenstern, D. Scheschkewitz: Tetrylene-Functionalized Si₇-Siliconoids Inorganic Chem. 2024, ahead of print doi: 10.1021/acs.inorgchem.4c00474
74	D. Schmitt, O. Janka, R. Leiner, G. Kickelbick, M. Gallei: Preparation of preceramic ferrocene-modified microparticles for the development of uniform porous iron oxide particles and their sustainable recycling Mater. Adv. 2024, 5, 3037-3050. DOI: 10.1039/D3MA01131C
73	L. Niedner, G. Kickelbick Amphiphilic titania Janus nanoparticles containing ionic groups prepared in oil-water Pickering emulsion Nanoscale 2024, 16, 7396-7408. DOI: 10.1039/D3NR04907H
72	E. C. J. Giesselmann, S. Engel, J. G. Volpini, H. Huppertz, G. Kickelbick, O. Janka: Mechanistic studies on the formation of ternary oxides by thermal oxidation of the cubic laves phase CaAl2 Inorg. Chem. Front. 2024, 11, 286-297. 10.1039/D3QI01604H
71	S. Engel, L. Schumacher, O. Janka: Modifying the valence phase transition in Eu₂Al₁₅Pt₆ via the solid solutions Eu₂Al₁₅(Pt_1–_xT_x)₆ (T = Pd, Ir, Au; x = 1) Z. Naturforsch. B 2024, 79b, 21-27. DOI: 10.1515/znb-2023-0072

2023

70	S. Pohl, G. Kickelbick: Influence of alkyl groups on the formation of softenable polysilsesquioxanes J Sol-Gel Sci Technol. 2023, 107, 329–346. DOI: 10.1007/s10971-023-06126-6
69	B. Oberhausen, A. Plohl, B.-J. Niebuur, S. Diebels, A. Jung, T. Kraus, G. Kickelbick Self-Healing Iron Oxide Polyelectrolyte Nanocomposites: Influence of Particle Agglomeration and Water on Mechanical Properties Nanomaterials, 2023, 13, 2983. DOI: 10.3390/nano13232983
68	Y. Curto, M. Koch, G. Kickelbick: Chemical and Structural Comparison of Different Commercial Food Supplement Silicon Uptake Solids 2023, 4, 1-21. DOI: 10.3390/solids4010001
67	M. Hunsicker, Ankur, B. Morgenstern, M. Zimmer, D. Scheschkewitz: Polyhedral Oligomeric Silsesquioxane D_3h-(RSiO_1.5)₁₄ Chem. Eur. J. 2024, e202303640. DOI: 10.1002/chem.202303640
66	J.-F. Kannengießer, B. Morgenstern, O. Janka, G. Kickelbick: Oligo-Condensation Reactions of Silanediols with Conservation of Solid-State-Structural Features Chem. Eur. J. 2023, e202303343. DOI: 10.1002/chem.202303343
65	I.-A. Bischoff, B. Morgenstern, M. Zimmer, A. Koldemir, R. Pöttgen, A. Schäfer: Bis(tetrelocenes) - fusing tetrelocenes into close proximity Dalton Trans. 2023, 52, 17928. DOI: 10.1039/D3DT02664G
64	P. Grewelinger, T. Wiesmeier, C. Präsang, B. Morgenstern, D. Scheschkewitz: Diboriranide σ-Complexes of d- and p-Block Metals Angew. Chem. Int. Ed. 2023, 62, e202308678. DOI: 10.1002/anie.202308678
63	D. Rauber, F. Philippi, D. Schröder, B. Morgenstern, A. J. P. White, M. Jochum, T. Welton, C. W. M.Kay: Room temperature ionic liquids with two symmetric ions Chem. Sci. 2023, 14, 10340-10346. DOI: 10.1002/chem.202301273
62	F. Hartmann, M. Bitsch, B.-J. Niebuur, M. Koch, T. Kraus, C. Dietz, R. W. Stark, C. R. Everett, P. Müller-Buschbaum, O. Janka, M. Gallei: Self-Assembly of Polymer-Modified FePt Magnetic Nanoparticles and Block Copolymers materials 2023, 16, 5503. DOI: 10.3390/ma16165503
61	M. A. Mohamed, S. Arnold, O. Janka, A. Quade, J. Schmauch, V. Presser, G. Kickelbick: Continuous wet chemical synthesis of Mo(C,N,O)_x as anode materials for Li-ion batteries J. Mater. Chem. A 2023, 11, 19936-19954. DOI: 10.1039/d3ta03340f
60	T. Büttner, O. Janka, V. Huch, D. Dhara, A. Jana, D. Scheschkewitz: Single-Source Precursors for the Chemical Vapor Deposition of Iron Germanides Eur. J. Inorg. Chem. 2023, 26, e202300433 DOI: 10.1002/ejic.202300433
59	A. Feuerstein, B. Boßmann, T. Rittner, R. Leiner, O. Janka, M. Gallei, A. Schäfer: Polycobaltoceniumylmethylene – A Water-Soluble Polyelectrolyte Prepared by Ring-Opening Transmetalation Polymerization ACS Macro Lett. 2023, 12, 1019-1024. DOI: 10.1021/acsmacrolett.3c00336
58	E. C. J. Gießelmann, S. Engel, Israa El Saudi, L. Schumacher, M. Radzieowski, J. M. Gerdes, O. Janka: On the RE₂TiAl₃ (RE = Y, Gd–Tm, Lu) series – the first aluminum representatives of the rhombohedral Mg₂Ni₃Si type structure Solids 2023, 4, 166-180. DOI: 10.3390/solids4030011
57	E. C. J. Gießelmann, M. Radzieowski, S. F. Matar, O. Janka: Formation of the Sub-Oxide Sc₄Au₂O_1–x and Drastically Negative ²⁷Al NMR Shift in Sc₂Al Inorg. Chem. 2023, 62, 9602-9617. DOI: 10.1021/acs.inorgchem.3c01097
56	E. C. J. Gießelmann, S. Engel, W. Kostusiak, Y. Zhang, P. Herbeck-Engel, G. Kickelbick, O. Janka: Raman and NMR Spectroscopic and Theoretical Investigations of the Cubic Laves-Phases REAl₂ (RE = Sc, Y, La, Yb, Lu) Dalton Trans. 2023, 52, 3391-3402. DOI: 10.1039/D3DT00141E
55	A. Michaely, O. Janka, E. C. J. Gießelmann, R. Haberkorn, H. T. A. Wiedemann, C. W. M. Kay, G. Kickelbick: Black Titania and Niobia within Ten Minutes – Mechanochemical Reduction of Metal Oxides with Alkali Metal Hydrides Chem. Eur. J. 2023, 29, e202300223. DOI: 10.1002/chem.202300223
54	S. Engel, E. C. J. Gießelmann, L. E. Schank, G. Heymann, K. Brix, R. Kautenburger, H. P. Beck, O. Janka: Theoretical and ²⁷Al NMR Spectroscopic Investigations of Binary Intermetallic Alkaline-Earth Aluminides Inorg. Chem. 2023, 62, 4260–4271. DOI: 10.1021/acs.inorgchem.2c04391
53	S. Engel, N. Zaremba, R. S. Touzani, O. Janka: Eu₄Al₁₃Pt₉ – A Coloring Variant of the Ho₄Ir₁₃Ge₉ Type Structure Z. Naturforsch. 2023, 78b, 147-156. DOI: 10.1515/znb-2023-0300
52	Y. Gao, J. Birkelbach, C. Fu, J. Herrmann, H. Irschik, B. Morgenstern, K. Hirschfelder, R. Li, Y. Zhang, R. Jansen, R. Müller: *The Disorazole Z Family of Highly Potent Anticancer Natural Products from Sorangium cellulosum: Structure, Bioactivity, Biosynthesis, and Heterologous Expression* Microbiology Spectrum. 2023, 11, e00730-23. DOI: 10.1128/spectrum.00730-23
51	N. Marigo, B. Morgenstern, A. Biffis, D. Munz: (CAAC)Pd(py) Catalysts Disproportionate to Pd(CAAD)₂ Organometallics. 2023, 42, 1567-1572. DOI: 10.1021/acs.organomet.3c00150
50	M. Mohamed, J. Lambert, L. Wirtz, B. Morgenstern, A. Schäfer: Aminosililyl-substituted cyclopentadienyl complexes of alkali metals Z. Naturforsch. 2023, 78B, 147-156. DOI: 10.1515/znb-2023-0012
49	A.-L. Thömmes, B. Morgenstern, M. Zimmer, D. M. Andrada, D. Scheschkewitz: σ,π-Conjugated Bis(germylene) Adducts with NHC and CAACs Chem. Eur. J. 2023, 29. e202301273. DOI: 10.1002/chem.202301273
48	J. Romanova, R. Lyapchev, M. Kolarski, M. Tsvetkov, D. Elenkova, B. Morgenstern, J. Zaharieva: Molecular Design of Luminescent Complexes of Eu(III): What Can We Learn from the Ligands. Molecules. 2023, 28, 4113. DOI: 10.3390/molecules28104113
47	C. Müller, J. Schu, B. Morgenstern, M. Zimmer, M. Schmidtmann, A. Schäfer: Phosphanyl-substituted tin half-sandwich complexes RSC Adv. 2023, 13, 10249-10253. DOI: 10.1039/D3RA01384G
46	D. Mandal, T. I. Demirer, T. Sergeieva, B. Morgenstern, H. T. A. Wiedemann, C. W. M. Kay, D. M. Andrada: Evidence of AlII Radical Addition to Benzene Angew. Chem. Int. Ed. 2023, 62, e202217184. DOI: 10.1002/anie.202217184
45	T. Imagawa, L. Giarrana, D. M. Andrada, B. Morgenstern, M. Nakamoto, D. Scheschkewitz: Stable Silapyramidanes J. Am. Chem. Soc. 2023, 145, 4757-4764. DOI: 10.1021/jacs.2c13530
44	D. Rauber, F. Philippi, J. Becker, J. Zapp, B. Morgenstern, B. Kuttich, T. Kraus, R. Hempelmann, P. Hunt, T. Welton, W. M. Kay: Anion and ether group influence in protic guanidinium ionic liquids Phys. Chem. Chem. Phys. 2023, 25, 6436-6453. DOI: 10.1039/D2CP05724G

2022

43	M. A. Mohamed, S. Arnold, O. Janka, A. Quade, V. Presser, G. Kickelbick: Self-activation of Inorganic-Organic Hybrids derived via Continuous Synthesis of Polyoxomolybdate and para-Phenylenediamine enables very High Lithium-Ion Storage Capacity ChemSusChem 2022, 16, e202202213. DOI: 10.1002/cssc.202202213
42	N. Zaremba, V. Pavlyuk, F. Stegemann, V. Hlukhyy, S. Engel, S. Klenner, R. Pöttgen, O. Janka: MAl₄Ir₂ (M = Ca, Sr, Eu) – Superstructures of the KAu₄In₂ type Monatsh. Chem. 2022, 154, 43–52. DOI: 10.1007/s00706-022-03005-8
41	H. Hübner, B.-J. Niebuur, O. Janka, L. Gemmer, M. Koch, T. Kraus, G. Kickelbick, B. Stühn, M. Gallei: Crystalline Carbosilane-Based Block Copolymers: Synthesis by Anionic Polymerization and Morphology Evaluation in the Bulk State Macromol. Chem. Phys. 2022, 225, 2200178. DOI: 10.1002/macp.202200178
40	I.-A. Bischoff, R. S. Meme, M. S. Bhatti, B. Morgenstern, A. Schäfer: Bis(indenyl)tetrelocenophanes: Introducing ansa-Indenyl Ligand Systems to the p-Block Organometallics. 2022, 41, 3781-3787. DOI: 10.1021/acs.organomet.2c00511
39	R. Lyapchev, A. I. Koleva, I. Z. Koleva, K. Subev, I. Madzharova, K. B. Simeonova, N. Petkova-Yankova, B. Morgenstern, V. Lozanova, P. Y. Petrov, R. D. Nikolova: Efficient Synthesis of Fluorescent Coumarines and Phosphorous-Containing Coumarin-Type Heterocycles via Palladium Catalyzed Cross-Coupling Reactions Molecules. 2022, 27217649. DOI: 10.3390/molecules27217649
38	L. Wirtz, K. Y. Ghulam, B. Morgenstern, A. Schäfer: Constrained Geometry ansa-Half-Sandwich Complexes of Magnesium - Versatile s-Block Catalysts ChemCatChem. 2022, 202201007. DOI: 10.1002/cctc.202201007
37	T. I. Demirer, B. Morgenstern, D. M. Andrada: Synthesis, Structure, and Bonding Analysis of Lewis Base and Lewis Acid/Base-Stabilized Phosphanylgallanes Eur. J. Inorg. Chem. 2022, e202200477. DOI 10.1002/ejic.202200477
36	M. Hunsicker, N. E. Poitiers, V. Huch, B. Morgenstern, M. Zimmer, D. Scheschkewitz: Interlinkage of a siliconoid with a silsesquioxane: en route to a molecular model system for silicon monoxide Z. Anorg. Allg. Chem. 2022, 648, e202200239. DOI: 10.1002/zaac.202200239
35	I.-A. Bischoff, B. Morgenstern, A. Schäfer: Heavier N-heterocyclic half-sandwich tetrylenes ChemComm. 2022, d2cc03107h. DOI: 10.1039/D2CC03107H
34	A. Koner, B. Morgenstern, D. M. Andrada: Metathesis Reactions of a NHC-Stabilized Phosphaborene Angew. Chem. Int. Ed. 2022, 61,e202203345. DOI: 10.1002/anie.202203345
33	W. Hofer, E. Oueis, A. A. Fayad, F. Deschner, A. Andreas, L. P. de Carvalho, S. Hüttel, S. Bernecker, L. Pätzold, B. Morgenstern, N. Zaburannyi, M. Bischoff, M. Stadler, J. Held, J. Herrmann, R. Müller: Regio- and Stereoselective Epoxidation and Acidic Epoxide Opening of Antibacterial and Antiplasmodial Chlorotonils Yield Highly Potent Derivatives Angew. Chem. Int. Ed. 2022, 61,e202202816. DOI: 10.1002/anie.202202816
32	N. E. Poitiers, V. Huch, B. Morgenstern, M. Zimmer, D. Scheschkewitz: Siliconoid Expansion by a Single Germanium Atom through Isolated Intermediates Angew. Chem. Int. Ed. 2022, 61,e202205399. DOI: 10.1002/anie.202205399
31	A. Grünewald, B. Goswami, K. Breitwieser, B. Morgenstern, M. Gimferrer, F. W. Heinemann, D. M. Momper, C. W. M. Kay, D. Munz: Palladium Terminal Imido Complexes with Nitrene Character J. Am. Chem. Soc. 2022, 144, 8897-8901. DOI: 10.1021/jacs.2c02818
30	M. Lambert, N. E. Poitiers, V. Huch, A. Goforth, D. Scheschkewitz: Silicon-carbon hybrid [2]-ladderanes Z. Anorg. Allg. Chem. 2022, 648, e202200030. DOI: 10.1002/zaac.202200030
29	L. H. Staub, J. Lambert, C. Müller, B. Morgenstern, M. Zimmer, J. Warken, A. Koldemir, T. Block, R. Pöttgen, A. Schäfer: *Bis(di-tert-butylindenyl)tetrelocenes* Dalton Transactions 2022, 51, 10714-10720. DOI: 10.1039/d2dt00582d
28	N. Bachmann, L. Wirtz, B. Morgenstern, C. Müller, A. Schäfer: Crystal structure of 1,1‘, 2,2‘, 4,4‘-hexaisopropylmagenesocene Acta Crystallographica 2022, E78, 287-290. DOI: 10.1107/S2056989022001189
27	I.-A. Bischoff, B. Morgenstern, A. Schäfer: Synthesis and structure of an asymmetrical sila[1] magnesocenophane Z. Naturforsch. 2022, B77, 95-98. DOI: 10.1515/znb-2021-0152
26	W. Haider, M. D. Calvin-Brown, I.-A. Bischoff, V. Huch, B. Morgenstern, C. Müller, T. Sergeieva, D. M. Andrada, A. Schäfer: Diarylpnictogenyldialkylalanes-Synthesis, structures, Bonding Analysis, and CO2 Capture Inorg. Chem. 2022, 61, 1672-1684. DOI: 10.1021/acs.inorgchem.1c03494
25	S. Baur, K. Brix, A. Feuerstein, O. Janka, R. Kautenburger: Retention of waste cocktail elements onto characterised calcium silicate hydrate (C–S–H) phases: A kinetic study under highly saline and hyperalkaline conditions Appl. Geochem. 2022, 143, 105319. DOI: 10.1016/j.apgeochem.2022.105319
24	S. Engel, J. Bönnighausen, F. Stegemann, R. S. Touzani, O. Janka: SrAl₅Pt₃ and Sr₂Al₁₆Pt₉ – two new strontium aluminum platinides Z. Naturforsch B. 2022, 77b, 367-379. DOI: 10.1515/znb-2022-0012

2021

23	D. Elenkova, R. Lyapchev, J. Romanova, B. Morgenstern, Y. Dimitrova, D. Dimov, M. Tsvetkov, J. Zaharieva: Luminescent Complexes of Europium (III) with 2-(Phenylethynyl)-1,10-phenanthroline: The Role of the Counterions Molecules 2021, 26, 7272. DOI:org/10.3390/molecules26237272
22	A. K. Boehm, S. Husmann, M. Besch, O. Janka, V. Presser, M. Gallei: Porous Mixed-Metal Oxide Li-Ion Battery Electrodes by Shear-Induced Co-assembly of Precursors and Tailored Polymer Particles ACS Appl. Mater. Interfaces 2021, 13, 61166-61179. DOI: 10.1021/acsami.1c19027
21	J.-F. Kannengießer, M. Briesenick, D. Meier, V. Huch, B. Morgenstern, G. Kickelbick: Synthesis and Hydrogen-Bond Patterns of Aryl-Group Substituted Silanediols and -triols from Alkoxy- and Chlorosilanes Chem. Eur. J. 2021, 27, 16461-16476. [DOI: 10.1002/chem.202102729
20	L. Wirtz, J. Lambert, B. Morgenstern, A. Schäfer: Cross-Dehydrocoupling of Amines and Silanes Catalyzed by Magnesocenophanes Organometallics2021, 40, 2108-2117. DOI: 10.1021/acs.organomet.1c00245
19	A. Koner, T. Sergeieva, B. Morgenstern, D. M. Andrada: A Cyclic Iminoborane-NHC Adduct: Synthesis, Reactivity, and Bonding Analysis Inorg. Chem. 2021, 60, 14202-14211. DOI: 10.1021/acs.inorgchem.1c01583
18	P. K. Majhi, M. Zimmer, B. Morgenstern, V. Huch, D. Scheschkewitz: Transition Metal Complexes of Heavier Vinylidenes: Allylic Coordination vs Vinylidene-Alkyne Rearrangement at Nickel J. Am. Chem. Soc. 2021, 143, 13350-13357. DOI: 10.1021/jacs.1c06453
17	P. K. Majhi, M. Zimmer, B. Morgenstern, D. Scheschkewitz: Transition-Metal Complexes of Heavier Cyclopropenes: Non-Dewar-Chatt-Duncanson Coordination and Facile Si=Ge Functionalization J. Am. Chem. Soc.2021, 143, 8981-8986. DOI: 10.1021/jacs.1c04419
16	T. Büttner, K. Weisshaar, P. Willmes, V. Huch, B. Morgenstern, R. Hempelmann, D. Scheschkewitz: Synthesis and electrochemistry of remotely thioether-functionalized disilenes Z. Anorg. Allgem. Chem. 2021, 647, 1674-1678. DOI: 10.1002/zaac.202100161
15	L. Klemmer, A.-L. Thömmes, M. Zimmer, V. Huch, B. Morgenstern, D. Scheschkewitz: Metathesis of Ge=Ge double bonds Nature Chem. 2021, 13, 373-377. DOI: 10.1038/s41557-021-00639-9
14	M. Veith, F. Sahin, S. Nadig, V. Huch, B. Morgenstern: Transformations of the polycyclic Alumosiloxane Al₂(OSiPh₂OSiPh₂O)₃ into new Polycycles and Co(II) and In(III) derivatives of (Ph₂SiO)₈[Al(O)OH]₄ Z. Anorg. Allg. Chem. 2021, 647, 1709-1720. DOI: 10.1002/zaac.202100126
13	P. Pinter, C. M. Schüßlbauer, F. A. Watt, N. Dickmann, R. Herbst-Irmer, B. Morgenstern, A. Grünwald, T. Ullrich, M. Zimmer, S. Hohloch, D. M. Guldi, D. Munz: Bright luminescent lithium and magnesium carbene complexes Chem. Sci. 2021, 12, 7401-7410. DOI: 10.1039/D1SC00846C
12	C. Müller, J. Warken, V. Huch, B. Morgenstern, I.-A. Bischoff, M. Zimmer, A. Schäfer: Diphosphanylmetallocenes of Main-Group Elements Chem. Eur. J.2021, 27, 5600-6510. DOI: 10.1002/chem.202005198
11	S. Lauk, M. Zimmer, B. Morgenstern, V. Huch, C. Müller, H. Sitzmann, A. Schäfer: Tetra- and Pentaisopropylcyclopentadienyl Complexes of Group 15 Elements Organometallics2021, 40, 618- 626. DOI: 10.1021/acs.organomet.1c00008
10	A. T. Kell, N. M. Obeid, P. Bag, M. Zimmer, V. Huch, D. Scheschkewitz: Reactivity of Phenylacetylene toward Unsymmetrical Disilines: Regiodivergent [2+2] Cycloaddition vs. CH Addition Z. Anorg. Allg. Chem. 2021, 647, 1751-1758. DOI: 10.1002/zaac.202100137
9	T. Stemler, C. Hoffmann, I. M. Hierlmeier, S. Maus, E. Krause, S. Ezziddin, G. Jung, M. D. Bartholomä: A Structure-Activity Relationship Stucy of Bimodal BODIPY-Labeled PSMA-Targeting Biconjugates ChemMedChem2021, 16, 2535-2545. DOI: 10.1002/cmdc.202100210
8	P. K. Majhi, V. Huch, D. Scheschkewitz: A Mixed Heavier Si=Ge Analoque of a Vinyl Anion Angew. Chem. Int. Ed. 2021, 60, 242-246. DOI: 10.1002/anie.202009406
7	W. Cao, S. Yin, M. Bitsch, S. Liang, M. Plank, M. Opel, M. A. Scheel, M. Gallei, O. Janka, M. Schwartzkopf, S. V. Roth, P. Müller-Buschbaum: In Situ Study of FePt Nanoparticles-Induced Morphology Development during Printing of Magnetic Hybrid Diblock Copolymer Films Adv. Funct. Mater. 2021, 32, 2107667. DOI: 10.1002/adfm.202107667
6	E. Gießelmann, R. S. Touzani, B. Morgenstern, O. Janka: Synthesis, crystal and electronic structure of CaNi₂Al₈ Z. Naturforsch B 2021, 76b, 659-668. DOI: 10.1515/znb-2021-0105
5	B. Oberhausen, G. Kickelbick: Induction heating induced self-healing of nanocomposites based on surface-functionalized cationic iron oxide particles and polyelectrolytes Nanoscale Adv. 2021, 3, 5589-5604. DOI: 10.1039/D1NA00417D
4	D. Meier, V. Huch, G. Kickelbick: Aryl-group substituted polysiloxanes with high-optical transmission, thermal stability, and refractive index J. Polym. Sci. 2021, 59, 2265-2283. DOI: 10.1002/pol.20210316
3	l. Wang, K. Frisella, P. Srimuk, O. Janka, G. Kickelbick, V. Presser: Electrochemical lithium recovery with lithium iron phosphate: What causes performance degradation and how can we improve the stability? Sustain. Energy Fuels 2021, 3124-3133. DOI: 10.1039/D1SE00450F
2	S. Pohl, O. Janka, E. Füglein, G. Kickelbick: Thermoplastic Silsesquioxane Hybrid Polymers with a Local Ladder-Type Structure Macromolecules 2021, 54, 3873-3885. DOI: 10.1021/acs.macromol.1c00310
1	P. Shankhari, O. Janka, R. Pöttgen,B. P. T. Fokwa: Rare-Earth-free Magnets: Enhancing Magnetic Anisotropy and Spin Exchange Toward High-T_C Hf₂MIr₅B₂(M = Mn, Fe) J. Am. Chem. Soc. 2021, 4205-4212. DOI: 10.1021/jacs.0c10778