A viologen derivative-and a carboxylic acid-based one-dimensional(1D)cocrystal Zn(Ⅱ)coordination polymer,{[Zn(bcbpy)_(2)][Zn(sip)Cl]·4H_(2)O}_(n)(1,bcbpy=1,1’-bis(3-carboxybenzyl)-4,4’-bipyridinium,sip=5-sulfo...A viologen derivative-and a carboxylic acid-based one-dimensional(1D)cocrystal Zn(Ⅱ)coordination polymer,{[Zn(bcbpy)_(2)][Zn(sip)Cl]·4H_(2)O}_(n)(1,bcbpy=1,1’-bis(3-carboxybenzyl)-4,4’-bipyridinium,sip=5-sulfoisophthalate),has been produced solvothermally and structurally characterized.Complex 1 comprises two cationic chains(Chain-1)and one anionic chain(Chain-2)that cross each other and grow into a 3D supramolecular structure through hydrogen bonding interactions.Notably,under UV 365 nm irradiation,1 showed a noteworthy photochromic transition between colorless and deep blue,which should be attributed to the generation of viologen radicals.Interestingly,it exhibited a two-step coloring phenomenon when heated,with the color changing to yellow and brown at 230℃and 250℃,respectively.Furthermore,1 demonstrated selective gas-chromic behavior toward ethylamine(EA),and it is recoverable by washing with MeCN.Furthermore,1 can be deposited on filter paper and demonstrates a potential application as an inkless print material.Interestingly,when complex 1 is removed from liquid nitrogen,as the temperature rises from 80 to 290 K,it exhibits a yellow green afterglow.In addition,the production of polyvinyl alcohol(PVA)film,1-PVA,has made the photochromism of 1 practical in ink-free printing,UV detection,and information anti-counterfeiting,and it is confirmed that the photochromic properties of viologen complex can be improved in PVA medium.展开更多
基金National Natural Science Foundation of China for financial support(21671022).
文摘A viologen derivative-and a carboxylic acid-based one-dimensional(1D)cocrystal Zn(Ⅱ)coordination polymer,{[Zn(bcbpy)_(2)][Zn(sip)Cl]·4H_(2)O}_(n)(1,bcbpy=1,1’-bis(3-carboxybenzyl)-4,4’-bipyridinium,sip=5-sulfoisophthalate),has been produced solvothermally and structurally characterized.Complex 1 comprises two cationic chains(Chain-1)and one anionic chain(Chain-2)that cross each other and grow into a 3D supramolecular structure through hydrogen bonding interactions.Notably,under UV 365 nm irradiation,1 showed a noteworthy photochromic transition between colorless and deep blue,which should be attributed to the generation of viologen radicals.Interestingly,it exhibited a two-step coloring phenomenon when heated,with the color changing to yellow and brown at 230℃and 250℃,respectively.Furthermore,1 demonstrated selective gas-chromic behavior toward ethylamine(EA),and it is recoverable by washing with MeCN.Furthermore,1 can be deposited on filter paper and demonstrates a potential application as an inkless print material.Interestingly,when complex 1 is removed from liquid nitrogen,as the temperature rises from 80 to 290 K,it exhibits a yellow green afterglow.In addition,the production of polyvinyl alcohol(PVA)film,1-PVA,has made the photochromism of 1 practical in ink-free printing,UV detection,and information anti-counterfeiting,and it is confirmed that the photochromic properties of viologen complex can be improved in PVA medium.
