Chen Shui-Sheng, Zhang Zi-You, Liao Rong-Bao, Zhao Yue, Wang Chuang, Qiao Rui, Liu Zhao-Di
School of Chemistry and Chemical Engineering, Fuyang Normal University, Fuyang 236041, People's Republic of China.
Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093, People's Republic of China.
Inorg Chem. 2021 Apr 5;60(7):4945-4956. doi: 10.1021/acs.inorgchem.1c00022. Epub 2021 Mar 10.
The elaborately designed π-electron-rich fluorescent ligand 1,4-bis(1-carboxymethylene-4-imidazolyl)benzene (HL), possessing bifunctional groups including the carboxylate groups (building units) and 4-imidazoyl groups (N-donor potential active sites) has been employed to construct fluorescent coordination polymers. A luminescent sensor, namely [Cd(L)(phen)]·5HO (), was obtained, which has a one-dimensional structure. The fluorescent material shows a blue emission maximum at 457 nm with a luminescence lifetime of 488 ns and a quantum yield (QY) of 4.56%. Significantly, serves as a promising multiresponsive luminescent sensor to detect trace nitroaromatic compounds (NACs) with the limits of detection (LOD) of 7.21 × 10, 1.85 × 10, and 1.15 × 10 mol/L for 2-nitrophenol (2-NP), 3-nitrophenol (3-NP), and 4-nitrophenol (4-NP), respectively. Furthermore, CP exhibits fluorescent turn-off and turn-on sensing behavior for Fe and Al metal ions with trace amounts of 1.05 × 10 and 1.13 × 10 mol/L, respectively. Experimental methods and theoretical calculations were employed to elucidate the sensing mechanism in detail.
精心设计的富含π电子的荧光配体1,4-双（1-羧甲基-4-咪唑基）苯（HL），具有包括羧酸根基团（结构单元）和4-咪唑基（氮供体潜在活性位点）在内的双官能团，已被用于构建荧光配位聚合物。得到了一种发光传感器，即[Cd(L)(phen)]·5H₂O（），它具有一维结构。该荧光材料在457 nm处有最大蓝光发射，发光寿命为488 ns，量子产率（QY）为4.56%。值得注意的是，它是一种有前景的多响应发光传感器，用于检测痕量硝基芳烃化合物（NACs），对2-硝基苯酚（2-NP）、3-硝基苯酚（3-NP）和4-硝基苯酚（4-NP）的检测限（LOD）分别为7.21×10⁻⁸、1.85×10⁻⁸和1.15×10⁻⁸ mol/L。此外，该配位聚合物对铁离子和铝离子分别在痕量1.05×10⁻⁶和1.13×10⁻⁶ mol/L时表现出荧光猝灭和开启传感行为。采用实验方法和理论计算详细阐明了传感机制。
