半青蓝素修饰汞离子探针的比色传感行为

Novel Hemicyanine Dye as Colorimetric Chemosensor for Hg^(2+)

合成了以半青蓝素为发光基团,分别以Se2N和S2N为结合位点的化学传感分子3a和3b,通过紫外-可见光谱研究了它们对各种金属离子的化学传感行为.结果表明,与含有S原子的主体分子3b相比,含有Se杂原子的主体分子3a对Hg2+具有较好的识别作用.向主体分子3a的乙腈水溶液中加入Hg2+后,其吸收光谱在410 nm处出现了一个新的吸收峰,同时溶液颜色由玫瑰红色变为桔黄色.因此,化合物3a有望用于检测Hg2+的化学传感器中.

A novel Hg2＋-selective chemosensor（3a） with hemicyanine as colorimetric reporting group and Se2N chelating unit as ion binding site was synthesized.The chemosensing behavior and the binding ability of chemosensor 3a with metal ions were investigated via UV-Vis spectrometry.Chemosensor 3a shows specific Hg2＋-selectivity in CH3CN-H2O（1∶1,volume ratio）.The addition of Hg2＋ makes the absorption spectrum of chemosensor 3a appear a new band around 410 nm.In addition,the color change of 3a-Hg2＋ from rose red to light orange allows naked-eye detection of Hg2＋.