Mechanofluorochromic and Inkless Writing Test of Pyridine-based Difluoroboron Complex with Triphenylamine Moiety

doi:10.7503/cjcu20230326

Abstract

Abstract:

In order to explore the photophysical property and practical application of difluoroboron complex， a D-π-A type difluoroboron complex 4'-（1，1-difluoro-1H-1λ⁴，9λ⁴-pyrido［1，2-c］［1，3，5，2］ oxadiazaborinin-3-yl）- N，N-diphenyl-［1，1'-biphenyl］-4-amine（Py-TPA BF₂） containing triphenylamine as electron donor and difluoroboron as electron acceptor was designed and synthesized. The photophysical testing results indicated that the complex exhibited intramolecular charge transfer characteristic and aggregation-induced emission activity. Further studies showed that the fluorescence emission spectrum of the complex Py-TPA BF₂ in solid state was red-shift from 530 nm to 550 nm under external stimulation， and the luminescence color changed from green to straw-yellow， and the color again returned to green after using dichloromethane vapor fuming. The X-ray diffraction testing results indicated that the phase transformation between the ordered crystalline phase and the disordered amorphous phase during grinding-fuming processes resulted in the reversible mechanofluorochromic performance of complex Py-TPA BF₂. Furthermore， it could also be applied to data security protection for inkless writing， which would be conducive to the rational design of intelligent luminescent materials.

Key words: Difluoroboron complex, Mechanofluorochromic, Data security protection

CLC Number:

O625.6

TrendMD:

WANG Fupeng, TIAN Jiazhuang, YANG Yanhua, GAO Shulin. Mechanofluorochromic and Inkless Writing Test of Pyridine-based Difluoroboron Complex with Triphenylamine Moiety[J]. Chem. J. Chinese Universities, 2023, 44(11): 20230326.

Figures/Tables 6

References 29

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