An Yan Yan, Su Li Jun, Zhao Xin, Yan Juan Zhi
Department of Materials and Chemical Engineering, Taiyuan University, Taiyuan, Shanxi 030032, People's Republic of China.
Acta Crystallogr C Struct Chem. 2022 Nov 1;78(Pt 11):612-620. doi: 10.1107/S2053229622009445. Epub 2022 Oct 7.
A new luminescent Cd compound, poly[[μ-1,4-bis(1H-imidazol-1-yl)benzene]{μ-5-[(3-carboxylphenoxy)methyl]isophthalato}cadmium(II)], [Cd(CHO)(CHN)] or [Cd(HL)(1,4-bib)] {HL is 5-[(3-carboxyphenoxy)methyl]isophthalic acid and 1,4-bib is 1,4-bis(1H-imidazol-1-yl)benzene}, I, has been synthesized successfully from Cd and a semirigid tricarboxylic ligand under hydrothermal conditions. Structure analysis shows that I is a two-dimensional structure with the point symbol {4.6}. The three-dimensional framework is constructed by O-H...O hydrogen bonds and π-π stacking interactions. Furthermore, the obtained Cd compound displays high solvent stability and excellent thermal stability, as shown by powder X-ray diffraction and thermogravimetry measurements. Studies of the luminescence properties reveal that compound I can act as a promising luminescent sensor for detecting Fe cations and Cr oxyanions with high selectivity and low detection limits (0.19 µM for Fe and 1.13 µM for CrO), and is additionally free from the interference of other ions. The mechanism of selective quenching was studied by measuring the UV-Vis absorption of the host compound and the target analytes.
一种新型发光镉化合物，聚[[μ-1,4-双(1H-咪唑-1-基)苯]{μ-5-[(3-羧基苯氧基)甲基]间苯二甲酸镉(II)}]，[Cd(CHO)(CHN)]或[Cd(HL)(1,4-bib)] {HL为5-[(3-羧基苯氧基)甲基]间苯二甲酸，1,4-bib为1,4-双(1H-咪唑-1-基)苯}，即化合物I，已在水热条件下由镉和一种半刚性三羧酸配体成功合成。结构分析表明化合物I是具有点符号{4.6}的二维结构。三维骨架由O-H...O氢键和π-π堆积相互作用构建而成。此外，如粉末X射线衍射和热重分析测量所示，所获得的镉化合物表现出高溶剂稳定性和优异的热稳定性。发光性质研究表明，化合物I可作为一种有前景的发光传感器，用于高选择性且低检测限地检测铁阳离子和铬含氧阴离子(铁为0.19 μM，铬酸根为1.13 μM)，并且不受其他离子的干扰。通过测量主体化合物和目标分析物的紫外可见吸收研究了选择性猝灭的机制。
