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Start Over Author "Miao, Hui" Journal angewandte chemie
6 results on '"Miao, Hui"'

4. Proton‐Activated 'Off–On' Room‐Temperature Phosphorescence from Purely Organic Thioethers

Author

Fan Liao, Carl Trindle, Xuepeng Zhang, Biao Chen, Guoqing Zhang, Yucai Wang, Yi Luo, Miao Hui, and Linkun Huang

Subjects
Quenching (fluorescence), Materials science, 010405 organic chemistry, 02 engineering and technology, General Chemistry, General Medicine, 021001 nanoscience & nanotechnology, Photochemistry, 010402 general chemistry, Fluorescence, Acceptor, 01 natural sciences, Catalysis, Fluorescence spectroscopy, 0104 chemical sciences, chemistry.chemical_compound, Thioether, chemistry, Molecule, Triplet state, 0210 nano-technology, Phosphorescence
Abstract

Room-temperature phosphorescence (RTP)-based sensors have distinctive advantages over the fluorescence counterparts, such as larger Stokes shifts and longer lifetimes. Unfortunately, almost all RTP sensors are operated on quenching-based mechanisms given the sensitive nature of the emissive triplet state. Here we report a type of thioether RTP molecules that shows RTP "turn-on" when volatile acid vapors such as HCl are in contact. To elucidate the underlying mechanism, model thioethers containing different donor/acceptor combinations are investigated via fluorescence spectroscopy and theoretical calculations aided by molecular coordinates obtained from single-crystal X-ray diffraction. It is revealed that a charge-transfer character in the phosphorescence state is crucial. The "turn-on" design concept may significantly broaden the sensing application scope for organic RTP molecules.

Published
2018

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