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Highly Elastic Organic Crystals for Flexible Optical Waveguides
Author(s) -
Liu Huapeng,
Lu Zhuoqun,
Zhang Zuolun,
Wang Yue,
Zhang Hongyu
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201802020
Subject(s) - bent molecular geometry , materials science , elasticity (physics) , quantum yield , fluorescence , optoelectronics , waveguide , crystal (programming language) , optics , composite material , physics , computer science , programming language
Abstract The study of elastic organic single crystals (EOSCs) has emerged as a cutting‐edge research of crystal engineering. Although a few EOSCs have been reported recently, those suitable for optical/optoelectronic applications have not been realized. Here, we report an elastic crystal of a Schiff base, ( E )‐1‐(4‐(dimethylamino)phenyl)iminomethyl‐2‐hydroxyl‐naphthalene. The crystal is highly bendable under external stress and able to regain immediately its original straight shape when the stress is released. It displays bright orange–red emission with a high fluorescence quantum yield of 0.43. Intriguingly, it can serve as a low‐loss optical waveguide even at the highly bent state. Our result highlights the feature and utility of “elasticity” of organic crystals.