Premium
Brightening up Circularly Polarized Luminescence of Monosubstituted Polyacetylene by Conformation Control: Mechanism, Switching, and Sensing
Author(s) -
Wang Sheng,
Hu Deping,
Guan Xiaoyan,
Cai Siliang,
Shi Ge,
Shuai Zhigang,
Zhang Jie,
Peng Qian,
Wan Xinhua
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202108010
Subject(s) - luminescence , intramolecular force , photoluminescence , circular dichroism , chemistry , trifluoroacetic acid , excited state , photochemistry , hydrogen bond , stokes shift , materials science , crystallography , stereochemistry , optoelectronics , organic chemistry , molecule , physics , atomic physics
The first example of luminescent monosubstituted polyacetylenes (mono‐PAs) is presented, based on a contracted cis‐cisoid polyene backbone. It has an excellent circularly polarized luminescence (CPL) performance with a high dissymmetric factor (up to the order of 10 −1 ). The luminescence stems from the helical cis‐cisoid PA backbone, which is tightly fixed by the strong intramolecular hydrogen bonds, thereby reversing the energy order of excited states and enabling an emissive energy dissipation. CPL switches are facilely achieved by the solvent and temperature through reversible conformational transition. By taking advantages of fast response and high sensitivity, the thin film of mono‐PAs could be used as a CPL‐based probe for quantitative detection of trifluoroacetic acid with a wider linear dynamic range than those of photoluminescence and circular dichroism. This work opens a new avenue to develop novel smart CPL materials through modulating conformational transition.