Tharmaraj Vairaperumal, Pitchumani Kasi
School of Chemistry, Madurai Kamaraj University, Madurai-625021, Tamil Nadu, India.
J Mater Chem B. 2013 Apr 14;1(14):1962-1967. doi: 10.1039/c3tb00534h. Epub 2013 Feb 22.
A fluorescent chemosensor for Cu ions based on dansyl-functionalized thiol stabilized silver nanoparticles containing 2-aminothiophenyl units as the Cu binding sites is developed. A decrease in fluorescence at 497 nm and an increase in fluorescence at 410 nm with an isoemissive point at 445 nm upon the addition of Cu ions is attributed to the formation of a Cu complex in aqueous acetonitrile based on an energy transfer mechanism. This sensor has excellent sensitivity and selectivity over other metal ions and has a detection limit as low as 5.0 × 10 mol L.
开发了一种基于丹磺酰功能化硫醇稳定的银纳米颗粒的铜离子荧光化学传感器，该纳米颗粒含有2-氨基硫苯基单元作为铜结合位点。在乙腈水溶液中加入铜离子后，497nm处荧光强度降低，410nm处荧光强度增加，等发射点在445nm，这归因于基于能量转移机制在乙腈水溶液中形成了铜配合物。该传感器对其他金属离子具有优异的灵敏度和选择性，检测限低至5.0×10⁻⁸mol/L。
