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Ultrasound‐Assisted Construction of Halogen‐Bonded Nanosized Cocrystals That Exhibit Thermosensitive Luminescence
Author(s) -
Yan Dongpeng,
Bučar DejanKrešimir,
Delori Amit,
Patel Bhavnita,
Lloyd Gareth O.,
Jones William,
Duan Xue
Publication year - 2013
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201203810
Subject(s) - luminescence , materials science , nanocrystal , fluorescence , sonication , supramolecular chemistry , nanotechnology , halogen , nano , chemical engineering , photochemistry , molecule , optoelectronics , organic chemistry , chemistry , alkyl , composite material , optics , physics , engineering
Multi‐component organic nanocrystals that are comprised of two or more supramolecular building blocks can be used to extend the design and assembly scope of solid molecular materials. Herein, we report the use of ultrasonication to prepare halogen‐bonded stilbene‐based nano‐cocrystals that exhibit different photoemission properties, including one‐ and two‐phonon emission and fluorescence lifetimes, relative to those of macrodimensional crystals. The structural transformation from nano‐cocrystals into nanocrystals upon heating results in a luminescence red‐shift from greenish blue to yellow. The temperature‐dependent ratiometric luminescence may allow such nano‐cocrystals to be used as fluorescent sensors and thermosensitive materials.