包含弯曲的富电子二羧酸酯连接基和柔性封端配体的发光MOF中的结构多样性：水中4-硝基苯胺的选择性检测。,Chemistry - An Asian Journal

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包含弯曲的富电子二羧酸酯连接基和柔性封端配体的发光MOF中的结构多样性：水中4-硝基苯胺的选择性检测。
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2019-08-21 , DOI: 10.1002/asia.201900866
Gouri Chakraborty ₁ , Prasenjit Das ₁ , Sanjay K Mandal ₁

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弯曲的双（萘）和基于羟基的二羧酸酯连接基与柔性的双（三齿）聚吡啶基配体的组合已用于与两个不同的d10金属中心ZnII和CdII自组装，以形成结构多样的发光金属-有机框架[Zn2（tpbn）（mbhna）2（H2 O）2]⋅4H2O⋅1.5DMF（1）和{[Cd2（tpbn）（mbhna）2]⋅2DMF} n（2）分别（其中，tpbn = N，N'，N''，N'''-四（吡啶-2-基甲基）丁烷-1,4-二胺和H2 mbhna = 4,4'-亚甲基-双[3-羟基-2 -萘羧酸]）。1和2都通过各种分析技术（包括单晶X射线衍射法）进行了表征和分析。在不同的溶剂中研究了其优异的发射性质，并进一步用于选择性检测芳族胺，尤其是水中的4-硝基苯胺，其检出限低于ppm级。1和2对4-NA的感应活性差异通过其结构得到了很好的证实。通过Stern-Volmer图，光谱重叠，时间分辨寿命研究和HOMO-LUMO能量计算已经建立了作用机理。此外，发现1和2可回收利用，并且在感测实验后显示出良好的稳定性。

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Structural Diversity in Luminescent MOFs Containing a Bent Electron-rich Dicarboxylate Linker and a Flexible Capping Ligand: Selective Detection of 4-Nitroaniline in Water.

A combination of a bent bis(naphthalene) and hydroxy-based dicarboxylate linker and a flexible bis(tridentate)polypyridyl ligand has been employed to self-assemble with two different d10 metal centers, ZnII and CdII , to form structurally diversified luminescent metal-organic frameworks, [Zn2 (tpbn)(mbhna)2 (H2 O)2 ]⋅4 H2 O⋅1.5DMF (1) and {[Cd2 (tpbn)(mbhna)2 ]⋅2DMF}n (2), respectively (where, tpbn=N,N',N'',N'''-tetrakis(pyridine-2-ylmethyl)butane-1,4-diamine and H2 mbhna=4,4'-methylene-bis[3-hydroxy-2-naphthalene carboxylic acid]). Both 1 and 2 are characterized and analyzed by various analytical techniques including single-crystal X-ray diffractometry. Their excellent emissive nature is studied in different solvents and further utilized to selectively detect aromatic amines, particularly 4-nitroaniline in water with detection limits at sub-ppm level. The difference in sensing activity of 1 and 2 toward 4-NA is corroborated well with their structures. The mechanism of action has been established through Stern-Volmer plot, spectral overlap, time-resolved lifetime studies and HOMO-LUMO energy calculations. In addition, 1 and 2 are found to be recyclable and display good stability after sensing experiments.

更新日期：2019-08-21

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