Three new Cd(II) luminescent metal-organic frameworks (LMOFs), namely {[Cd(bib) (bdc)]·DMF·H₂O}_n (1), {[Cd(bib) (ndc) (H₂O)]·DMF}_n (2) and {[Cd₂(bib)₂(bpdc)₂]·1.5H₂O} (3) (bib = 1,3-bis(1-imidazolyl)benzene, H₂bdc = 1,4-benzenedicarboxylic acid, H₂ndc = 1,4-naphthalenedicarboxylic acid, H₂bpdc = biphenyl-4,4′-dicarboxylic acid and DMF = N,N-dimethylformamide), have been synthesized by combining the V-shaped bib ligand and different dicarboxylate ligands under solvothermal conditions. Complex 1 displays a 4-fold interpenetrated 3D framework with sra topology. Complex 2 presents a 2D (4,4) layer structure derived from bib and ndc²⁻ mixed spacers. Complex 3 is a 2-fold interpenetrated array based on 2D (4,4) wave-like coordinated layers. The structural diversity among these complexes can be realized by the abduction of linear dicarboxylate ligands. The results demonstrate that the length of dicarboxylate ligands makes an impact on the structural diversity. Moreover, the complexes 1–3 can be well dispersed in different solvents, which exhibit highly selective and sensitive detection for nitrobenzene (NB) over other solvents by means of fluorescence quenching effect. The work illuminates fine-tuning of structure and in turn sensing properties towards LMOFs based on the reasonable selection of organic ligands.

三种新的Cd（II）发光金属有机骨架（LMOF），即{[Cd（bib）（bdc）]·DMF·H ₂ O} _n（1），{[Cd（bib）（ndc）（H ₂ O）]·DMF} _n（2）和{[Cd ₂（bib）₂（bpdc）₂ ]·1.5H ₂ O}（3）（bib = 1,3-双（1-咪唑基）苯，H ₂ bdc = 1,4-苯二甲酸H ₂ ndc = 1,4-萘二甲酸H ₂bpdc =联苯-4,4'-二羧酸和DMF = N，N-二甲基甲酰胺）是通过在溶剂热条件下将V形围嘴配体和不同的二羧酸酯配体结合而合成的。复合体1显示具有sra拓扑的4倍互穿3D框架。配合物2呈现2d（4,4）层结构，该结构源自bib和ndc ^2-混合间隔子。复合体3是基于2D（4,4）波状协作层的2倍互穿阵列。这些配合物之间的结构多样性可通过绑架线性二羧酸酯配体来实现。结果表明，二羧酸酯配体的长度对结构多样性有影响。此外，配合物1– 3可以很好地分散在不同的溶剂中，通过荧光猝灭作用，与其他溶剂相比，它们对硝基苯（NB）表现出高度的选择性和敏感性。这项工作阐明了结构的微调，并根据对有机配体的合理选择，进而对LMOFs感测了特性。