Lu Zhixiang, Liu Yunming, Lu Shuhan, Li Yuan, Liu Xiaolan, Qin Yu, Zheng Liyan
Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province, School of Chemical Science and Technology, Yunnan University Kunming Yunnan 650091 China
RSC Adv. 2018 May 30;8(35):19701-19706. doi: 10.1039/c8ra03591a. eCollection 2018 May 25.
The detection of Ag in the environment is very important to determine the level of pollution from silver complexes, which have caused various human health problems. Herein, an aggregation-induced emission (AIE) chromophore (tetraphenylethane, TPE) attached to a benzimidazole group (tetra-benzimidazole, TBI-TPE) is synthesized and utilized to detect Ag in the environment. The strong chelating effect between the benzimidazole group and Ag leads to the formation of aggregates, and strong yellow fluorescence signals were observed after adding Ag into a TBI-TPE solution. The stoichiometry of the complex of TBI-TPE and Ag was established to be 1 : 2 using photochemical and mass spectra measurements. The detection limit of the Ag assay is 90 nM with a linear range from 100 nM to 6 μM. This study provides a facile method to determine Ag in real environmental samples with satisfactory results.
检测环境中的银对于确定银配合物的污染水平非常重要，银配合物已引发各种人类健康问题。在此，合成了一种连接有苯并咪唑基团的聚集诱导发光（AIE）发色团（四苯乙烷，TPE）（四苯并咪唑，TBI-TPE），并用于检测环境中的银。苯并咪唑基团与银之间的强螯合作用导致聚集体的形成，向TBI-TPE溶液中加入银后观察到强烈的黄色荧光信号。通过光化学和质谱测量确定TBI-TPE与银的配合物化学计量比为1∶2。银测定的检测限为90 nM，线性范围为100 nM至6 μM。本研究提供了一种简便的方法来测定实际环境样品中的银，结果令人满意。
