Abstract Three bulky conjugated 4-(2,6-di(pyrazin-2-yl)pyridin-4-yl)benzoate (L)-based coordination polymers (CPs), {[Cu(L)Cl]·2.25H2O}n (1), {[Cu(H2O)(L)](NO3)·H2O}n (2) and {[Zn(H2O)(L)(NO3)][Zn(H2O)2(L)](NO3) H2O}n (3), were solvothermally synthesized by varying transition metal ions and pH values of the reactant mixture. Their crystal structures, band gaps and catalytic performances for photodegradation of organic dyes and electrocatalytic reduction of hydrogen peroxide were fully investigated. Single-crystal structural determinations reveal that both 1 and 2 are bent one-dimensional (1D) chains constructed from ditopic L− connectors and square pyramidal CuII ions in slightly different coordination environments. By contrast, complex 3 consists of two hydrogen-bonding 1D chains with hexacoordinate ZnII octahedra extended by L− linkers. Due to the more suitable band gap and the unsaturated coordination site of the CuII center, the three CPs exhibit varied photodegradation activity of Rhodamine B and Methylene Blue with the degradation rates of 91.2% and 91.9% for 1, 84.9% and 86.9% for 2 as well as 30.6% and 42.7% for 3. Additionally, 1 and 2 also display good electrocatalytic activity towards the reduction of hydrogen peroxide.

中文翻译：

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具有双重光催化和电催化性能的三个庞大的共轭 4-(2,6-di(pyraziin-2-yl)pyridin-4-yl)benzoate 链

摘要 三种庞大的共轭 4-(2,6-di(pyraziin-2-yl)pyridin-4-yl)benzoate (L) 基配位聚合物 (CPs), {[Cu(L)Cl]·2.25H2O}n (1)、{[Cu(H2O)(L)](NO3)·H2O}n (2)和{[Zn(H2O)(L)(NO3)][Zn(H2O)2(L)](NO3 ) H2O}n (3) 是通过改变反应混合物的过渡金属离子和 pH 值溶剂热合成的。充分研究了它们的晶体结构、带隙和对有机染料的光降解和过氧化氢电催化还原的催化性能。单晶结构测定表明，1 和 2 都是弯曲的一维 (1D) 链，它们由双位 L− 连接器和方形锥体 CuII 离子在略微不同的配位环境中构建。相比之下，复合物 3 由两个氢键一维链组成，六配位 ZnII 八面体由 L- 接头延伸。