We report the synthesis of norbornene derived rhodamine (Nor-Rh) and thiol (Nor-Th) monomers and their polymerizations. The response of Nor-Rh against As(III) in the presence of potassium iodate and hydrochloric acid is monitored through UV and fluorescence spectroscopy. The observed colorimetric as well as fluorometric changes are attributed to the redox reaction involved in the unique design. Cyclic voltammogram measurements confirm the oxidation of As(III) to As(V) during the sensing event. The response of the sensing event is instantaneous. This novel design is able to sense ppb levels of As(III) very selectively in an aqueous environment. As(III) is trapped when it is passed through a column containing Nor-Th polymers. As(III) free water is tested using a calibration curve from the Nor-Rh response.
我们报道了
降冰片烯衍生的
罗丹明 (Nor-Rh) 和
硫醇 (Nor-Th) 单体的合成及其聚合。通过紫外和荧光光谱监测在
碘酸钾和
盐酸存在下 Nor-Rh 对 As(III) 的响应。观察到的比色和荧光变化归因于独特设计中涉及的氧化还原反应。循环伏安图测量证实了传感事件期间 As(III) 氧化为 As(V)。感测事件的响应是瞬时的。这种新颖的设计能够在
水环境中非常选择性地检测 ppb 级的 As(III)。 As(III) 通过含有 Nor-Th 聚合物的色谱柱时被捕获。使用 Nor-Rh 响应的校准曲线测试 As(III) 游离
水。