Naked eye colorimetric multifunctional sensing of nitrobenzene, Cr(VI) and Fe(III) with a new green emission Ag6S6 multi-metal-cluster

作者：Zhou, Rui-Sha^*; Lin, Zhi-Zhu; Xin, Li-Dong; Song, Jiang-Feng^*; Liu, Hu; Guo, Zhanhu^*

来源：Advanced Composites and Hybrid Materials, 2018, 1(4): 785-796.

DOI：10.1007/s42114-018-0061-2

• Organic sulfur
• Luminescence
• Colorimetric sensing
• Quenching mechanisms

With the increasing need of detecting chemical pollutants, modern analytical instruments show many advantages but also have some common drawbacks such as high operational cost and tedious pretreatment procedures. Thus, developing a fast, simple, and convenient colorimetric sensing system is a challenge. Here, a new Ag6S6 cluster-based coordination compound formulated as Ag-6(dmpymt)(6) (1) (Hdmpymt = 4,6-dimethylpyrimidine-2-thione) was synthesized under solvothermal condition and displayed apparently green luminescence emission and good stabilities in water and some organic solvents. Fluorescence experiments illustrated that 1 displayed efficiently naked eye colorimetric sensing for nitrobenzene (NB), Cr(VI), and Fe(III) ions by fluorescence quenching in the emulsions. The possible sensing mechanisms are attributed to the competitive absorption of excitation wavelength energy between the analytes and the compound 1. Furthermore, the fluorescent test papers of 1 were prepared as well and showed efficient, convenient, and easily recycled characteristics, presenting a potential sensing application for the environmental concerns.

• 出版日期2018-12
• 单位中北大学; 郑州大学