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Updated: Jan 3, 2026

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
Published on: August 7, 2018
A novel photochromic coordination polymer based on a robust viologen ligand exhibiting multiple detection properties
Hai Yu Wang1, Zu Ming Tu2, Hong Zhang1
1Institute of Polyoxometalate Chemistry, Department of Chemistry, Northeast Normal University, Changchun, Jilin 130024, PR China.
Abstract:
A new photochromic and porous Cd(ii) coordination polymer (CP) has been synthesized by using a robust viologen ligand, named 1-(3-carboxybenzyl)-4,4'-bipyridinium chloride (m-Hbcbpy·Cl) and CdCl2·2H2O. This CP (Cd-bcbpy) shows a fast response and reversible photochromism through the progress of ET due to the formation of viologen radicals. Cd-bcbpy shows a sharp response to blue rays and selectively detects organic amine molecules, which are electron rich, in the solid state due to the electron-deficient properties of m-Hbcbpy·Cl. The detection of organic amine and benzene molecules has been confirmed by the visual color changing phenomenon and luminescence quenching experiment. Cd-bcbpy can detect aniline in very low concentrations (10-4 M). In addition, the structure of Cd-bcbpy maintains stability in aqueous solutions of hydrochloric acid with the pH ranging from 1 to 7. The photo-controlled luminescence properties of this CP, during the coloration-decoloration process, have been studied.
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