Chem. J. Chinese Universities ›› 2026, Vol. 47 ›› Issue (4): 20260007.doi: 10.7503/cjcu20260007

• Article • Previous Articles     Next Articles

Preparation and Mechanochromism Property of a Gold-Copper Cluster Coordination Polymer

HAN Yuchen, ZHANG Meng, YANG Qi, PENG Qiuchen, LI Kai()   

  1. College of Chemistry,Zhengzhou University,Zhengzhou 450001,China
  • Received:2026-01-01 Online:2026-04-10 Published:2026-02-01
  • Contact: LI Kai E-mail:likai@zzu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22371264)

Abstract:

An atomic precise gold-copper coordination polymer, [AuCu(L)2n (L=phenylacetylene), was synthesized, which exhibits excellent luminescent properties in the aggregated state. [AuCu(L)2n has a one⁃dimensional chain⁃like structure and can be efficiently synthesized by a one⁃pot method at room temperature. Upon grinding, the color of [AuCu(L)2n changes from yellow to red, and the emission wavelength red⁃shifts from 550 nm to 620 nm. Under the action of dichloromethane vapor, the red [AuCu(L)2n powders can revert to yellow. This reversible change process exhibits excellent fatigue resistance, making [AuCu(L)2n suitable for the application in fluorescent anti⁃counterfeiting materials. Mechanistic study shows that [AuCu(L)2n transforms from a crystalline state to an amorphous state after grinding. Meanwhile, the original metal⁃metal bonds and a large number of π-π interactions within and between molecules are disrupted, blocking the long-range cluster center luminescence channel, which is the main reason for its luminescence and color change.

Key words: Coordination polymer, Gold-copper cluster, Mechanochromism

CLC Number: 

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