In this work, three new coordination polymers with a free carboxyl group, [Zn₄(HIDCPy)₄(DMSO)(DMF)₃]_n (1), [Cu(HIDCPyO)(DMSO)]_n (2), and {[Cd₄(HIDCPy)₆]·4DMF·4C₂H₈N·H₂O}_n (3) (H₂IDCPy = 2-(pyridine-2-yl)-1H-imidazole-4,5-dicarboxylic acid), had been successfully constructed by fine conditions control. Owing to the good fluorescence performance of 1, we explored the complex as a fluorescence sensor for alkaline matters, such as ammonia and amines. The test of selectivity showed that only α,β-diamine, ethylenediamine (En) and 1,2-propylenediamine (1,2-PDA), could greatly sensitize the fluorescence of 1. The fluorescence titration showed the detection limits of 1 were 3.93 ppm for En and 3.21 ppm for 1,2-PDA, respectively. Moreover, the competing and circulating experiments indicated that 1 had satisfactory anti-interference and recyclability toward En and 1,2-PDA sensing. All of these results implied 1 should be a potential turn-on fluorescent probe for detecting α,β-diamine, and the sensing mechanism had also been in-depth elaborated. At the same time, as the control experiments, the fluorescence sensing of 3 toward ammonia and amines was carried out. The results showed that α,β-diamine and other amines could also sensitize the fluorescent emission of 3, but there was a significant gap with 1 in the selectivity and sensitivity.

中文翻译：

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带有游离羧基的过渡金属配位聚合物的构建及α，β-二胺的开启荧光检测

在这项工作中，三种具有游离羧基的新配位聚合物[Zn ₄（HIDCPy）₄（DMSO）（DMF）₃ ] _n（1），[Cu（HIDCPyO）（DMSO）] _n（2）和{ [Cd ₄（HIDCPy）₆ ]·4DMF·4C ₂ H ₈ N·H ₂ O} _n（3）（H ₂ IDCPy = 2-（吡啶-2-基）-1 H-咪唑-4,5-二羧酸酸），已通过精细条件控制成功构建。由于1的良好荧光性能，我们探索了该络合物作为碱性物质（例如氨和胺）的荧光传感器。选择性的测试表明，只有α，β -二胺，乙二胺（恩）和1,2- -丙（1,2- PDA），可以大大敏感的荧光1。荧光滴定显示，En的检出限为1的3.93 ppm，1,2-PDA的检出限为3.21 ppm 。此外，竞争和循环实验表明1对En和1,2-PDA具有令人满意的抗干扰性和可回收性感应。所有这些结果暗示1应该是一个潜在的导通荧光探针，用于检测α，β -二胺，和感测机构也一直在深入的阐述。同时，作为对照实验，对氨和胺进行了3的荧光感测。结果表明，α，β -二胺和其它胺也可以敏化的荧光发射3，但与一个显著间隙1中的选择性和灵敏度。