Abstract Three new coordination complexes [Zn(btec)0.5(L1)0.5(H2O)] n (1), [Ni(H2btec)(L1)(H2O)2] n (2), and {[Ni(btec)0.5(L2)(H2O)3]·2H2O} n (3) [H4btec = 1,2,4,5-benzenetetracarboxylic acid), L1 = N,N′-bis(3-pyridyl)adipamide, L2 = N,N′-bis(3-pyridyl)octanediamide] have been obtained under hydrothermal conditions. Single-crystal X-ray diffraction analysis has revealed that complex 1 has a layer structure based on [Zn(btec)0.5] n ribbons and the μ 2-bridging ligands L 1 . Complex 2 possesses a layered framework constructed by [Ni(H2btec)] n linear chains and [Ni(L1)] n wave-like chains. Complex 3 forms layers based on [Ni(L2)] n helical chains and μ 2-bridging L2 ligands, representing an interesting 4-fold interpenetrating 2D braided framework. The three different 2D frameworks exhibit 3,4-connected {4.62}2{42.62.82} topology for 1, 4-connected {44.62} topology for 2 and 3-connected {63} topology for 3. Their adjacent layers are further linked by hydrogen bonding interactions to generate 3D supramolecular structures. The differences in the nature of both the metal ions and the organic ligands lead to various coordination modes in the final structures. The photocatalytic activities and the fluorescence properties of complexes 1–3 were investigated.

中文翻译：

---

锌（II）和镍（II）的三种新型配位配合物与两种柔性双（吡啶基）-双（酰胺）配体的组装、光催化和荧光性能

摘要 三种新的配位配合物 [Zn(btec)0.5(L1)0.5(H2O)] n (1)、[Ni(H2btec)(L1)(H2O)2] n (2) 和 {[Ni(btec)0.5 (L2)(H2O)3]·2H2O} n (3) [H4btec = 1,2,4,5-苯四甲酸), L1 = N,N'-双(3-吡啶基)己二酰胺, L2 = N,N '-双（3-吡啶基）辛二酰胺]已在水热条件下获得。单晶 X 射线衍射分析表明，配合物 1 具有基于 [Zn(btec)0.5] n 带和 μ 2 桥配体 L 1 的层结构。复合物 2 具有由 [Ni(H2btec)] n 条线性链和 [Ni(L1)] n 条波状链构成的分层框架。复合物 3 基于 [Ni(L2)] n 螺旋链和 μ 2-桥接 L2 配体形成层，代表一个有趣的 4 倍互穿 2D 编织框架。三个不同的 2D 框架展示了 3,4-connected {4.62}2{42.62.82} 拓扑结构 1, 2 的 4 连接 {44.62} 拓扑和 3 的 3 连接 {63} 拓扑。它们的相邻层通过氢键相互作用进一步连接以生成 3D 超分子结构。金属离子和有机配体的性质差异导致最终结构中的各种配位模式。研究了配合物1-3的光催化活性和荧光性质。