Two new metal–organic frameworks (MOFs), formulated as [Cd₃(L)₂(H₂O)₂]·2H₂O (1) and [Zn₂(L)(OH)(H₂O)]·2DMA (2, DMA = N,N-dimethylacetamide), were first constructed via an unsymmetrical N-heterocyclic 5-((4-carboxypyridin-2-yl)oxy)isophthalic acid (H₃L) ligand. Then, a proportion of the Zn(II) ions of 2 were substituted by fine-tuning the contents of Co(II) ions to obtain two new isomers, Co1-MOF 2 and Co2-MOF 2, the successful doping of which can be proved by PXRD, IR spectra, ICP, XPS, and SEM. The luminescent experiments suggested that complex 1 should be a good detector for detecting Fe³⁺ and Cr₂O₇²⁻ ions. More remarkably, the Co-rich MOF materials have increased gas capture for CO₂ and CH₄ compared to that of the Co-free isomer 2, and the absorption amount of CO₂ and CH₄ may rise with the increasing content of Co(II) ions in the system at higher pressure and lower temperature.

中文翻译：

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新的发光金属-有机骨架和不同的掺杂异构体的设计和制备：感测污染离子并增强气体捕获能力

两种新的金属有机骨架（MOF），分别表示为[Cd ₃（L）₂（H ₂ O）₂ ]·2H ₂ O（1）和[Zn ₂（L）（OH）（H ₂ O）]·首先通过不对称的N-杂环5-（（4-羧基吡啶-2--2-基）氧基）间苯二甲酸（H ₃ L）配体构建2DMA （2，DMA ＝N，N-二甲基乙酰胺）。然后，将锌（的比例II的）离子2通过微调Co的含量（取代II）离子，以获得两个新的异构体，CO1-MOF 2和Co2-MOF 2，其成功掺杂可以通过PXRD，IR光谱，ICP，XPS和SEM证明。发光实验表明，配合物1应该是检测Fe ³⁺和Cr ₂ O ₇ ^2-离子的良好检测器。更显着地，富Co MOF材料具有增加的气体捕获的CO ₂和CH ₄相比，在无钴异构体2，和CO的吸收量₂和CH ₄可以用Co含量的增加上升（II）在较高压力和较低温度下的离子。