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14–17 Mar 2022
Europe/Berlin timezone

In-situ recrystallization of elastically bendable cocrystals of caffeine post partial desolvation

16 Mar 2022, 16:10
20m
Talk Solid State Physics and Crystal Physics Solid State and Materials Chemistry II

Speaker

Dr Somnath Dey (Institute of Crystallography, RWTH Aachen University, Germany)

Description

The system of 1:1:1 cocrystal solvate of caffeine, 4-chloro-3-nitrobenzoic acid and methanol is the first reported example of molecular crystal that exhibits reversible elastic flexibility. Here we show in-situ recrystallization of long flexible acicular single crystals post partial desolvation. This apparent reversible process in accompanied by increased inclusion of the solvent than as grown crystals resulting in larger unit cell volume within the same space group symmetry.

Primary author

Dr Somnath Dey (Institute of Crystallography, RWTH Aachen University, Germany)

Co-authors

Ms Angelika von Berg (Institute of Crystallography, RWTH Aachen University, Germany) Mr VIliam B. Hakala (Forschungszentrum Jülich GmbH, Jülich Centre for Neutron Science JCNS, Germany) Ms Hend Shahed (Forschungszentrum Jülich GmbH, Jülich Centre for Neutron Science JCNS, Germany) Dr Carsten Paulmann (Deutsches Elektronen-Synchrotron, Germany) Dr Martin Tolkiehn (Deutsches Elektronen-Synchrotron, Germany) Dr Andrzej Grzechnik (Institute of Crystallography, RWTH Aachen University, Germany) Dr Lars Peters (Institute of Crystallography, RWTH Aachen University, Germany)

Presentation materials