Two novel Mn(II)-based one-dimensional coordination polymers {[Mn(bcbpy)(H2O)4]·(p-BDC)·2H2O}n (1) and {(bcbpy)·[Mn(NDC)(H2O)4]·DMF·3H2O}n (2) constructed from the viologen moiety (1,1′-bis(3-carboxylatobenzyl)-4,4′-bipyridinium = bcbpy) and different aromatic dicarboxylic acids (p-phthalic acid = p-H2BDC, 1,4-naphthalene dicarboxylic acid = H2NDC), have been synthesized by solvent evaporation and characterized systematically. Their crystal structures and photochromic behaviors are investigated. Both complexes exhibit reversible photochromism due to forming viologen radicals through electron transfer. Meanwhile, photo-controlled fluorescence and ink-free erasable printing capabilities are discussed to enrich the research on crystal photophysical properties.

中文翻译：

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两种基于 1,1′-双（3-羧基苄基）-4,4′-联吡啶基团的一维功能配位聚合物


两种新型基于 Mn（II） 的一维配位聚合物 {[Mn（bcbpy）（H2O）4]·（p-BDC）·2H2O}n （1） 和 {（bcbpy）·[Mn（NDC）（H2O）4]·由紫精部分（1,1′-双（3-羧基苄基）-4,4′-联吡啶 = bcbpy）和不同的芳香族二羧酸（对邻苯二甲酸 = p-H2BDC，1,4-萘二羧酸 = H2NDC）构建的 DMF·3H2O}n （2） 通过溶剂蒸发合成并进行了系统表征。研究了它们的晶体结构和光致变色行为。由于通过电子转移形成紫精自由基，两种复合物都表现出可逆的光致变色。同时，讨论了光控荧光和无油墨可擦除打印能力，以丰富晶体光物理性质的研究。