化学
氨基酸
荧光
氢键
粉末衍射
热重分析
水溶液
荧光光谱法
结晶学
组合化学
无机化学
分子
有机化学
生物化学
量子力学
物理
作者
Zhe‐Peng Deng,Bo-Tao Ji,Jianghai Chen,Biao Zhao,Jinguo Li,Yin‐Xia Sun,Yu Sun
标识
DOI:10.1016/j.molstruc.2023.137132
摘要
A multifunctional probe Cd-MOF was successfully prepared by hydrothermal reaction using Cd2+ as a node, 1,3,5-triimidazoly benzene (L) and ligands D(+)-camphoric acid (D-H2cam) as linkers. It was characterized by single crystal X-ray diffraction (XRD), powder X-ray diffraction (PXRD), chromaticity coordinates (CIE), and thermogravimetric analysis (TGA). The study of fluorescence properties revealed that the fluorescence of Cd-MOF at 325 nm was significantly quenched in the presence of HSO4− or acidic amino acids (glutamate (Glu) or aspartic acid (Asp)) because of the formation of hydrogen bonds between analyte and Cd-MOF. Interestingly, the in-situ generated [Cd-MOF-Glu/Asp] system could be used for relay recognition of basic amino acids arginine (Arg) and lysine (Lys). Fluorescence could be 'turned on' under the same experimental conditions. This could be attributed to the destruction of the hydrogen bond between Cd-MOF and acidic amino acids. The sensing process possessed outstanding sensitivity and selectivity, rapid time responsiveness, and recyclability in aqueous solution. Finally, the sensing mechanisms of Cd-MOF and [Cd-MOF-Glu/Asp] systems were investigated by PXRD, UV spectroscopy, and DFT theoretical calculations.
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