Metal-dependent chromic properties of three isostructural 1D coordination polymers based on 1-(2-carboxyethyl)-4, 4′-bipyridinium ligand. (June 2020)

• Record Type: Journal Article
• Authors: Liu, Jinjian; Lu, Yiwei; Li, Jing; Lu, Wenbo
• Is Part Of: Dyes and pigments. Volume 177(2020)
• Publication Date: 2020-06
• Subjects: 1-(2-Carboxyethyl)-4, 4′-bipyridinium bromide (HCBbpyBr) -- Photochromism -- Hydrochromism -- Metal cations effect; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2020.108266
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: As a relatively new type of multifunctional material, chromic materials have attracted much attention due to their potential applications in many fields. In order to investigate the effect of metal cations on the chromic behavior, three new isostructural coordination polymers (CPs) based on the electron-deficient viologen-like ligand 1-(2-carboxyethyl)-4, 4′-bipyridinium bromide (HCBbpyBr) and 1, 2, 4, 5-benzenetetracarboxylic acid (H4 BTEC) with different metal cations have been synthesized, namely {[TM0.5 (CBbpy)(H2 O)][TM(H2 O)6 ]0.5 (H2 BTEC)·H2 O}n (TM = Zn (1 ), Ni (2 ) and Co (3 )), exhibiting metal-dependent chromic behavior and adjustable responsive properties. Compound 1 only exhibits photochromism, compound 2 exhibits both photochromism and hydrochromism, while compound 3 has no chromism observed. Comparison of the three CPs shows that metal cations play an important role in regulating the chromic properties. Graphical abstract: Image 1 Highlights: Three new isostructural 1D viologen-based coordination polymers have been prepared. They exhibit metal-dependent chromic behaviors and adjustable responsive properties. Comparison shows that metal cations play an important role in regulating the chromic properties.