期刊
DYES AND PIGMENTS
卷 164, 期 -, 页码 390-397出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2019.01.057
关键词
Carbazole; Tetraphenylethene; High thermal stability; Different fluorescence; Aggregation-induced emission; Mechanofluorochromism
资金
- National Natural Science Foundation of China [21702079]
- 5511 Science and Technology Innovation Talent Project of Jiangxi Province [20165BCB18015]
- Natural Science Foundation of Jiangxi Province [20171ACB20025]
- youth project of Natural Science Foundation of Jiangxi Province [20171BAB213004]
- Young Talents Project of Jiangxi Science and Technology Normal University [2017QNBJRC005]
- Project of the Science Fund of Jiangxi Education Office [GJJ180593]
Three new carbazole-based fluorescent molecules 1-3 functionalized with tetraphenylethene have been successfully synthesized, and these compounds have high thermal stability, and they exhibited different fluorescence in solid states with the superior luminescence quantum yields of 99.04% (1), 98,90% (2) and 39.83% (3). Their aggregation-induced behaviors were explored by the study of photoluminescence spectroscopy. The results showed that luminogens 1-3 exhibited remarkable aggregation-induced emission effect. Furthermore, their distinct mechanical stimulus-responsive fluorescence characteristics were also surveyed by solid-state photoluminescence spectroscopy. Interestingly, the various emitting colors of these luminogens could be changed into the same green, and the repeatabilities of their mechanochromic luminescence behaviors were outstanding, and the powder X-ray diffraction results indicated that the reversible conversion from a crystalline to an amorphous state was responsible for the obvious mechanofluorochromism phenomena of compounds 1-3. This work will be valuable for the exploitation of mechanical-force sensors with typical aggregation-induced emission feature.
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