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Multistimuli-responsive materials based on a zinc(II) complex with high-contrast and multicolor switching.

Han-Wen Zheng1, Dong-Dong Yang1, Yong-Sheng Shi1

  • 1Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China. xjzheng@bnu.edu.cn.

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Summary

This study presents a novel zinc(II) complex exhibiting aggregation-induced emission enhancement (AIEE) and multicolor switching. The material shows potential for rapid detection of mechanical stimuli and acid-base vapors.

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Area of Science:

  • Materials Science
  • Chemistry
  • Nanotechnology

Background:

  • Developing single-compound materials with multicolor and high-contrast stimulus-responsive luminescence is challenging.
  • Stimulus-responsive materials are crucial for advanced sensing applications.

Purpose of the Study:

  • To synthesize and characterize a zinc(II) complex with multicolor and high-contrast chromic properties.
  • To investigate the complex's aggregation-induced emission enhancement (AIEE) and solid-state luminescence switching under various stimuli.

Main Methods:

  • Synthesis and characterization of a zinc(II) complex.
  • Investigation of aggregation-induced emission enhancement (AIEE) in THF/H2O mixtures.
  • Evaluation of solid-state mechanochromic, acidochromic, and electrochromic luminescence properties.

Main Results:

  • The zinc(II) complex exhibits AIEE and reversible mechanochromic luminescence (Δλem = 100 nm) due to phase transitions.
  • The complex displays significant acidochromic properties (Δλem = 130 nm) upon exposure to acid/base vapors.
  • Visible color changes under mechanical, vapor, and electrical stimuli were observed, enabling naked-eye detection.

Conclusions:

  • The synthesized zinc(II) complex demonstrates excellent stimulus-responsive multicolor luminescence.
  • The material's high-contrast switching and AIEE properties make it suitable for developing rapid detection test papers and films for mechanical stimuli and HCl/NH3 vapors.