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Photoluminescent Ferroelastic Molecular Crystals
Author(s) -
Seki Tomohiro,
Feng Chi,
Kashiyama Kentaro,
Sakamoto Shunichi,
Takasaki Yuichi,
Sasaki Toshiyuki,
Takamizawa Satoshi,
Ito Hajime
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201914610
Subject(s) - ferroelasticity , crystal twinning , photoluminescence , materials science , anisotropy , crystallography , crystal (programming language) , stress (linguistics) , diffraction , composite material , chemistry , optics , microstructure , optoelectronics , ferroelectricity , physics , linguistics , philosophy , computer science , dielectric , programming language
Ferroelasticity has been reported for several types of molecular crystals, which show mechanical‐stress‐induced shape change under twinning and/or spontaneous formation of strain. Aiming to create materials that exhibit both ferroelasticity and light‐emission characteristics, we discovered the first examples of ferroelastic luminescent organometallic crystals. Crystals of arylgold(I)( N ‐heterocyclic carbene)(NHC) complexes bend upon exposure to anisotropic mechanical stress. X‐ray diffraction analyses and stress‐strain measurements on these ferroelastic crystals confirmed typical ferroelastic behavior, mechanical twinning, and the spontaneous build‐up of strain. A comparison with single‐crystal structures of related gold‐NHC complexes that do not show ferroelasticity shed light on the structural origins of the ferroelastic behavior.