Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (11): 20230289.doi: 10.7503/cjcu20230289

• Organic Chemistry • Previous Articles     Next Articles

Design, Synthesis and Properties of High-contrast Cationic Mechanofluorochromic Materials

GENG Peng1, XIANG Juanjuan1, ZHANG Xinghong1, YUAN Shuang1, MAO Miaofu1, LU Yunxiang2, XIAO Shuzhang1()   

  1. 1.College of Materials and Chemical Engineering,China Three Gorges University,Yichang 443002,China
    2.Key Laboratory for Advanced Materials and Department of Chemistry,East China University of Science and Technology,Shanghai 200237,China
  • Received:2023-06-19 Online:2023-11-10 Published:2023-08-29
  • Contact: XIAO Shuzhang E-mail:shuzhangxiao@ctgu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22171163);the “111” Intellectual Attraction Base Project in CTGU, China(D20015);the Yichang Natural Science Research Program, China(A23-2-025)

Abstract:

High-contrast organic mechanofluorochromic materials have potential applications in security ink and memory devices, but the mechanochromic materials with luminescence change over 100 nm are still limited. In this work, we designed a D-π-A organic molecule with large dipole moment NN-diphenyl-4-[2-(quinolin-2- yl)]aniliue hydrochloride(QV-TPA-HCl), and performed Polymorph for the design molecule. Polymorph indicated that it had the potential to form both monomer and π-π stacked cluster. Single crystal structure proved the formation of π cluster. Upon alternative grinding at 30 ℃ and 100 ℃, Near-infrared fluorescence(673 nm) and green luminescence(490 nm) could be obtained with luminescence difference 183 nm, due to the reversible conversion between the π cluster and monomer. Our investigation presents a rational strategy for designing high-contrast mechanochromic materials with significant luminescence change.

Key words: Mechanochromic, Polymorph, Protonation, Stimuli-responsive, Fluorescence

CLC Number: 

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