Bohong Gao , Yuping Sun , Gang Li , Chengcheng Zhang , Xinli Liu , Yuting Zhou , Xinyi Wang
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引用次数: 0
Abstract
In this study, we addressed the efforts of controlling the structures of coordination polymers (CPs) for enhanced photochromism by modulating interactions between electron donors (EDs) and acceptors (EAs) or boosting EAs' electron affinity. Two new CPs, [Cd (TTVP)0.5 (2,6-NDC) (H2O)]·0.5DMF (1) and [Cd (TTVP)0.5 (4,4′-BPC) (H2O)2]·0.5H2O (2) have been successfully synthesized using the thiazolothiazole extended viologen ligand TTVP (TTVP = 2,5-bis(pyridinium-4-yl)thiazolo [5,4-d]thiazole propionate) as an EA and different aromatic carboxylic acids as EDs. Complex 1 features a 3D supramolecular structure with interpenetrating layers with n-π and π-π interactions, while complex 2 adopts a 2D structure with layer stacking through n-π interactions. Both CPs exhibit notable photochromism via photo-introduced electron transfer (PIET) process, with different ED/EA arrangements (ED-EA-ED-EA for 1 and ED-EA-ED for 2) affecting their photoresponse. UV irradiation reveals varying photochromic response rates and color contrasts in the two CPs, highlighting EDs' influential role. Furthermore, both CPs showed a synergistic response of photochromism and photo-controlled fluorescence. Notably, a composite polymer film with reversible photochromic and photo-controlled fluorescence behaviors was fabricated by integrating compound 1 into a styrene ethylene butylene styrene (SEBS) matrix. This study presents a new approach for improving the performance of photochromic materials with potential applications in daily life.
期刊介绍：
Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied.
Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media.
The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.
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