Unusual Surface Texture, Dimensions and Morphology Variations of Chiral and Single Crystals

We demonstrate here a unique metallo‐organic material where the appearance and the internal crystal structure are in contradiction. The egg‐shaped (ovoid) crystals have a brain‐like texture. Although these micro‐sized crystals are monodispersed; like fingerprints their grainy surfaces are never exac...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2021-08, Vol.60 (33), p.18256-18264
Main Authors: Singh, Vivek, Houben, Lothar, Shimon, Linda J. W., Cohen, Sidney R., Golani, Ofra, Feldman, Yishay, Lahav, Michal, Boom, Milko E.
Format: Article
Language:English
Subjects:
Brain
chirality
Crystal structure
Crystals
Electron diffraction
Metallography
MOFs
Morphology
multidomain
single crystallinity
Single crystals
Surface layers
Texture
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Summary:We demonstrate here a unique metallo‐organic material where the appearance and the internal crystal structure are in contradiction. The egg‐shaped (ovoid) crystals have a brain‐like texture. Although these micro‐sized crystals are monodispersed; like fingerprints their grainy surfaces are never exactly alike. Remarkably, our X‐ray and electron diffraction studies unexpectedly revealed that these structures are single‐crystals comprising a continuous coordination network of two differently shaped homochiral channels. By using the same building blocks under different reaction conditions, a rare series of crystals have been obtained that are uniquely rounded in their shape. In stark contrast to the brain‐like crystals, these isostructural and monodispersed crystals have a comparatively smooth appearance. The sizes of these crystals vary by several orders of magnitude. The egg‐shaped homochiral crystals: A brain‐like texture combined with single crystallinity. A series of isomorphous crystals found in a rare space group have been formed with varied morphologies. These crystals contain chiral channels and are made from achiral components.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202105772