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1A Star-Shaped Solvatofluorochromic Pyrene-Triarylamine Derivative as a Fluorescent Thermometer over a Wide Temperature Range显示文摘of main observation and conclusion A star-shaped compound 1 with a pyrene core and four triarylamine arms has been prepared and characterized.It exhibits intense intramolecular-charge-transfer(ICT)emissions with strong solvatofluorochromism.On the basis of the temperature-dependent emission color and wavelength changes,compound 1 behaves as a fluorescent thermometer between 200 and 400 Kwith a high theromosensitivity.In comparison,model compounds with one or two triarylamine arms show distinctly lower thermosensitivity.Tian-Ge Sun Zhong-Liang Gong Jiang-Yang Shao Yu-Wu Zhong 2020Chinese Journal of Chemistry2020,38,12:2
2Stimuli-Responsive Polycycles Based on Hetero-Buckybowl Trithiasumanene显示文摘Stimuli-responsive molecules are highly desirable in different scenario such as smart materials,bio-imaging,and environment monitoring.Herein,a series of hetero polycycles which show optical response toward chemical stimuli are synthesized from trithiasumanene(TTS).The TTS is transformed into ortho-quinone form,which then undergoes three-component Debus-Radziszewski reaction with aldehydes and ammonia to give oxazole-fused TTS(2-6).The thiophene rings on 3-5 are selectively oxidized to thiophene-S,S-dioxides,affording 3-3O_(2)-5-3O_(2).It is found that the electronic structures of these compounds are governed by the sub-stituents on oxazole moiety and oxidation state of thiophene ring.Moreover,these hetero polycycles exhibit optical response toward different chemical stimuli.Particularly,compounds 6 and 3-3O_(2) can serve as fluorescence detectors for harmful chemicals sulfide ions(S2-/HS-)and aniline,respectively.This work indicates that TTS is a promising precursor for the creation of responsive materials.Wenbo Wang Lijun Feng Xinqiang Hua Chengshan Yuan Xiangfeng Shao 2021Chinese Journal of Chemistry2021,39,12:0
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