Assembly of 3,4-bis(3-pyridyl)-5-(4-pyridyl)-1,2,4-triazole (L 334 ) and CuBr 2 without or with the presence of thiocyanate (SCN − )/dicyanamide [dca, N(CN) 2 − ] anion produces three Cu(II) coordination polymers, {[Cu(L 334 )(H 2 O) 2 ](Br) 2 (CH 3 OH)} n ( 1 ), {[Cu(L 334 )(SCN) 2 (H 2 O)](H 2 O)(EA)} n ( 2 ) (EA = ethyl acetate), and [Cu(L 334 )(dca) 2 ] n ( 3 ). The crystal structures for 1 and 3 show different 2D layered coordination networks, whereas that for 2 represents a distinct 1D coordination pattern. The above results demonstrate that the addition of pseudohalide anions plays an important role in structural construction of coordination architectures. Moreover, 1 exhibits the best adsorption capacity toward methyl orange (MO) dye.

中文翻译：

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具有不同结构和染料吸附行为的 Cu(II) 配位聚合物的伪卤化物定向组装

3,4-双(3-吡啶基)-5-(4-吡啶基)-1,2,4-三唑 (L 334 ) 和 CuBr 2 的组装，不存在或存在硫氰酸盐 (SCN - )/双氰胺 [dca , N(CN) 2 - ] 阴离子产生三种 Cu(II) 配位聚合物，{[Cu(L 334 )(H 2 O) 2 ](Br) 2 (CH 3 OH)} n ( 1 ), {[Cu (L 334 )(SCN) 2 (H 2 O)](H 2 O)(EA)} n ( 2 ) (EA = 乙酸乙酯)，和 [Cu(L 334 )(dca) 2 ] n ( 3 ) . 1 和 3 的晶体结构显示不同的 2D 分层协调网络，而 2 的晶体结构代表不同的 1D 协调模式。上述结果表明，拟卤化物阴离子的加入在配位结构的结构构建中起着重要作用。此外，1对甲基橙（MO）染料表现出最好的吸附能力。