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Updated: May 13, 2025
A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks
Published on: April 28, 2023
Mechanochromic Luminescence Behavior in Multivariate Metal-Organic Frameworks Based on Linker Effects
Jun-Bao Zhou1, Zhuo-Hang Zhu1, Min Chen1
1Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, PR China.
Abstract:
Mechanochromic luminescence molecules show great appeal in the realm of intelligent luminescent materials but face great challenges from aggregation-caused quenching and/or amorphization during mechanical processing. Integrating aggregation-induced emission (AIE) luminogens into the architecture of highly crystalline metal-organic frameworks (MOFs) could potentially address these issues. In this work, two isomorphic Zn-MOFs ({[Zn(TCPE)0.5(L)0.5]·guests}, where H4TCPE = 1,1,2,2-tetra(4-carboxylphenyl)ethylene, L1 = triethylenediamine, and L2 = piperazine) are synthesized via a multiligand assembly approach. The mechanochromic luminescence behaviors observed in these Zn-MOFs have been thoroughly analyzed, with a focus on the influence of linker effects. Under mechanical grinding, the lattice contraction of Zn-MOFs is accompanied by the distortion of the benzene rings within TCPE4-, leading to altered intramolecular twisted charge transfer within the Zn-MOFs, which subsequently changes their luminescence properties. The potential application of this luminescence behavior in light-emitting diodes was preliminarily explored.
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