Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 26, Issue 52, Pages 11979-11984Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202002641
Keywords
boron; crystal engineering; flexible crystals; fluoroalkyl chains; luminescence; optical waveguides
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Funding
- Science and Engineering Research Board, New Delhi [ECR/2016/000082]
- INST, Mohali
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The design of molecular compounds that exhibit flexibility is an emerging area of research. Although a fair amount of success has been achieved in the design of plastic or elastic crystals, realizing multidimensional plastic and elastic bending remains challenging. We report herein a naphthalidenimine-boron complex that showed size-dependent dual mechanical bending behavior whereas its parent Schiff base was brittle. Detailed crystallographic and spectroscopic analysis revealed the importance of boron in imparting the interesting mechanical properties. Furthermore, the luminescence of the molecule was turned-on subsequent to boron complexation, thereby allowing it to be explored for multimode optical waveguide applications. Our in-depth study of the size-dependent plastic and elastic bending of the crystals thus provides important insights in molecular engineering and could act as a platform for the development of future smart flexible materials for optoelectronic applications.
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