Yang Xue, Ren Yixia, Chai Hongmei, Hou Xiufang, Wang Zhixiang, Wang Jijiang
College of Chemistry and Chemical Engineering, Laboratory of New Energy and New Function Materials, Shaanxi Key Laboratory of Chemical Reaction Engineering, Yan'an University Yan'an 716000 P. R. China
RSC Adv. 2021 Jul 7;11(39):23975-23984. doi: 10.1039/d1ra03737d. eCollection 2021 Jul 6.
Four fluorescent zinc(ii) metal-organic frameworks, namely [Zn(HCIA)(4,4'-bipy)] (1), [Zn(CIA)(OH)(1,4-bibz)]·HO (2), [Zn(CIA)(OH) (4,4'-bbpy)] (3), and [Zn(HCIA) (4,4'-bimp)]·HO (4), were prepared hydrothermally with a flexible triangular ligand (HCIA) and a series of linear N-donor ligands (HCIA = 5-(2-carboxybenzyloxy) isophthalic acid, 4,4'-bipy = 4,4'-bipydine, 1,4-bibz = 1,4-bis(1-imidazoly)benzene; 4,4'-bbpy = 4,4'-bis (imidazolyl) biphenyl; 4,4'-bimp = 4,4'-bis (imidazole-1-ylethyl) biphenyl). Structural analyses revealed that complex 1 exhibited a 2D brick-like network structure based on the basic bimetallic ring, 2 was also a 2D interspersed structure from the 1D tubular structure, compound 3 possessed a 2D (4,4) network with 4,4'-bbpy occupying the holes, and complex 4 displayed a 2D network from the 1D ladder-like chain. The thermal stabilities and fluorescent properties of these complexes were investigated in the solid state. The fluorescent sensing experiments revealed that all Zn-MOFs could highly sensitively detect nitrobenzene in aqueous solution, which indicated that these materials can be used as fluorescent probes for the detection of nitrobenzene.
通过水热法，使用柔性三角配体（HCIA）和一系列线性氮供体配体（HCIA = 5-(2-羧苄氧基)间苯二甲酸，4,4'-bipy = 4,4'-联吡啶，1,4-bibz = 1,4-双(1-咪唑基)苯；4,4'-bbpy = 4,4'-双(咪唑基)联苯；4,4'-bimp = 4,4'-双(咪唑-1-基乙基)联苯）制备了四种荧光锌（II）金属有机框架，即[Zn(HCIA)(4,4'-bipy)]（1）、[Zn(CIA)(OH)(1,4-bibz)]·H₂O（2）、[Zn(CIA)(OH)(4,4'-bbpy)]（3）和[Zn(HCIA)(4,4'-bimp)]·H₂O（4）。结构分析表明，配合物1基于基本双金属环呈现二维砖状网络结构，2也是由一维管状结构形成的二维穿插结构，化合物3具有4,4'-bbpy占据孔的二维（4,4）网络，配合物4由一维梯状链形成二维网络。对这些配合物的热稳定性和荧光性质进行了固态研究。荧光传感实验表明，所有锌基金属有机框架都能高度灵敏地检测水溶液中的硝基苯，这表明这些材料可作为检测硝基苯的荧光探针。
