Chinese Journal of Applied Chemistry ›› 2023, Vol. 40 ›› Issue (3): 397-403.DOI: 10.19894/j.issn.1000-0518.220187

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Multiple-Responsive Coordination Polymers Based on a Carboxybenzyl Viologen Ligand

Jin-Jian LIU1,2(), Yi-Wei LU2   

  1. 1.Modern College of Humanities and Science of Shanxi Normal University,Linfen 041000,China
    2.School of Chemistry and Material Science,Shanxi Normal University,Taiyuan 030031,China
  • Received:2022-05-23 Accepted:2022-11-15 Published:2023-03-01 Online:2023-03-27
  • Contact: Jin-Jian LIU
  • About author:liujj@sxnu.edu.cn
  • Supported by:
    the Shanxi Province Graduate Education Innovation Project(2021L608)

Abstract:

With the continuous development of smart materials, multiple-responsive viologen coordination polymers are expected to be applied in engineering fields such as materials science and biology, and have aroused extensive interest. In order to obtain such compounds, a carboxybenzyl viologen ligand, 1,1'-bis(4-carboxybenzyl)-4,4'-bipyridine dichloride (H2BpybcCl2) is used as the functional ligand to react with the transition metal ions Ni2+1),Mn2+2) and Co2+3) to form three isostructural two-dimensional (2D) coordination polymers {[M2(Bpybc)3(H2O)6]·(OH)4·nH2O} n . Due to the existence of viologen radicals, the three compounds exhibited photochromic behaviors under UV light irradiation. Upon heating, the three compounds also showed obvious color changes due to d-d transitions in the coordination field caused by dehydration.

Key words: Viologens, Coordination polymers, Photochromism, Thermochromism

CLC Number: