Enhanced Sensitivity and Selectivity of Chemosensor for Malonate by Anchoring on Gold Nanoparticles
作者:Yanyun Liu、Yun Liu、Zhongshi Liang、Xiangyang Li、Shunying Liu、Jiahui Yu
DOI:10.1002/cjoc.201190118
日期:2011.3
assembled on gold nanoparticles was synthesized. The preorganized system possesses phenylthiourea units for the spectrophotometric sensing of dicarboxylates, especially malonate, based on changes in the surface plasmon absorption of the gold nanoparticles (GNPs). The intensity of the absorbance band increases gradually with the concentration of dicarboxylates increasing. But such an ion‐selective change
合成了一种新型的有机-无机纳米杂化受体4,该受体经双硫脲臂官能化,然后组装在金纳米颗粒上。基于金纳米颗粒(GNP)的表面等离激元吸收的变化,预组织的系统具有苯硫脲单元,用于分光光度法感测二羧酸盐(尤其是丙二酸)。吸收带的强度随着二羧酸盐浓度的增加而逐渐增加。但是,在单硫脲修饰的GNP,受体3和游离受体2进行的对照试验中,未观察到等离激元带中的离子选择性变化。如从定量滴定得出的缔合常数所示,受体4可以选择性识别较短碳链的二羧酸根阴离子,并且对丙二酸具有最高的亲和力。通过1 H NMR和UV-vis光谱法评估了受体4阴离子的相互作用特性。