Department of Chemistry, College of Science, North University of China, Taiyuan 030051, PR China; Center for Optics Research and Engineering, Shandong University, Qingdao 266237, PR China.
Department of Chemistry, College of Science, North University of China, Taiyuan 030051, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2022 Jan 5;264:120232. doi: 10.1016/j.saa.2021.120232. Epub 2021 Jul 29.
To achieve the ultrastable LMOFs with predominant luminescent sensing performances, the aromatic π-electron mixed ligands strategy was introduced, and the ternary LMOF of {[Zn(HDDB)(bib)]·3HO} (1), was fabricated based on 3,5-di(2',4'-dicarboxylphenyl)benozoic acid (HDDB) and the N-donor of meta-bis(imidazol-1-yl)benzene (bib) under mixed solvothermal condition. LMOF 1 features the first reported 3D 3,4,4-c {6.8.10}{6.8}{6.8.10} framework with 21.2 % porosity as well as high thermal and chemical stability. Further luminescent sensing showed that LMOF 1 as a bifunctional chemosensor possessing predominant detectability for sensitive detect the hexavalent chromates and nitroimidazoles/nitrofurans antibiotics in water through strong luminescent quenching effects, with excellent reusability as well as trace detection limits. Moreover, luminescent quenching mechanisms were further investigated from electron transfer and energy transfer viewpoints.
为了实现具有优异发光传感性能的超稳定 LMOFs，引入了芳香π-电子混合配体策略，并基于 3,5-二（2',4'-二羧基苯基）苯二酸（HDDB）和 N-供体间-双（咪唑-1-基）苯（bib），在混合溶剂热条件下合成了三元 LMOF{[Zn(HDDB)(bib)]·3HO}（1）。LMOF 1 具有首次报道的具有 21.2%孔隙率的三维 3,4,4-c{6.8.10}{6.8}{6.8.10}骨架，具有高热稳定性和化学稳定性。进一步的发光传感表明，LMOF 1 作为一种双功能化学传感器，对水中的六价铬和硝基咪唑/硝基呋喃类抗生素具有优异的检测灵敏度和强的发光猝灭效应，具有良好的可重复使用性和痕量检测限。此外，还从电子转移和能量转移的角度进一步研究了发光猝灭机制。
