Four coordination polymers, namely {[Cd₂(1,4-NDC)₂(dbp)₂]·DMF}_n (1), {[Cd(1,4-NDC)(dbp)(H₂O)]}_n (2), {[Zn(2,6-NDC)(dbp)(H₂O)]}_n (3), and {[Cu(2,6-NDC)(dbp)]·0.25DMF·0.2H₂O]}_n (4) (1,4-NDC = 1,4-naphthalenedicarboxylic acid; 2,6-NDC = 2,6-naphthalenedicarboxylic acid; dbp = 4,4′-dimethyl-2,2′-bipyridine), were synthesized under solvothermal conditions by using a mixed-ligand strategy. Single-crystal X-ray diffraction analysis shows that compounds 1 and 2 contain similar 2D layers with {4⁴6²} topology, while compounds 3 and 4 exist as 1D chain structures, that extend into different 3D supramolecular architectures via H-bonds and interchain π∙∙∙π stacking interactions. Title compounds 1-3 exhibit strong emission at 342, 363 and 362 nm, respectively. Moreover, the selective luminescence sensing of compound 1 was investigated, owing to its excellent chemical stability and luminescence properties. Compound 1 shows remarkable fluorescence responses towards Fe³⁺ ions, with a detection limit of 1.0 × 10^–5 M, indicating that this compound could sensitively detect trace amounts of Fe³⁺ in aqueous solutions through luminescence quenching.

四种配位聚合物，即{[Cd ₂（1,4-NDC）₂（dbp）₂ ]·DMF} _n（1），{[Cd（1,4-NDC）（dbp）（H ₂ O）]} _n（2），{[Zn（2,6-NDC）（dbp）（H ₂ O）]} _n（3）和{[Cu（2,6-NDC）（dbp）]·0.25DMF·0.2 H ₂ O]} _n（4）（1,4-NDC = 1,4-萘二甲酸； 2,6-NDC = 2,6-萘二甲酸； dbp = 4,4'-二甲基-2,2'-通过使用混合配体策略在溶剂热条件下合成联吡啶）。X射线单晶衍射分析表明，化合物1和2包含相似的2D层，其中{4 ⁴ 6 ²}拓扑，而化合物3和4以一维链结构的形式存在，它们通过H键和链间π∙∙∙π堆积相互作用扩展到不同的3D超分子体系中。标题化合物1-3分别在342、363和362nm处显示出强发射。此外，由于化合物1具有出色的化学稳定性和发光特性，因此对化合物1的选择性发光进行了研究。化合物1对Fe ³⁺离子显示出显着的荧光响应，检出限为1.0×10 ^–5  M，表明该化合物可以灵敏地检测痕量的Fe ³⁺ 在水溶液中通过发光淬灭。