罗丹明-三嗪荧光探针对Al^(3+)和Cr^(3+)的识别

Rhodamine-Triazine Fluorescence Probe Recognition for Al^(3+) and Cr^(3+)

用罗丹明B乙二胺分步取代三聚氯氰环上两个氯原子,得到对称结构的罗丹明-三嗪衍生物。在pH 4～6的乙醇溶液中,衍生物能选择性识别Al 3+和Cr3+,荧光发射和紫外-可见吸收显著增强。衍生物对Al 3+和Cr3+识别不受共存金属离子干扰。在一定条件下,可作为高选择性和高灵敏的Al 3+或Cr3+荧光和比色增强型光谱探针。

A symmetrical rhodamine-triazine derivative was synthesized through step-by-step substitution of rhodamine B ethylenediamine with two chlorines on cyanuric chloride.It showed an extreme selectivity for Al^ 3＋and Cr^3＋over other common metal ions and strong fluorescence emission and UV-Visible absorption in the ethanol solution of pH 4.Due to the difference in complexing ability,the recognition of the derivative for Al ^3＋and Cr^3＋was not interfered by other coexisting ions.Under certain conditions,the derivative can be used as high selectivity and high sensitivity Al ^3＋or Cr^3＋fluorescence and colorimetric enhanced probe.