A Novel p-Nitroaniline Fluorescent Sensor Based on Molecular Recognition of Carboxymethyl-β-cyclodextrin-capped ZnO/ZnS/MgO Nanocomposites

作者：Gao, Qianqian; Liu, Fei; Jiang, Yuzhu; Dai, Huajun; Fu, Tianhua; Kou, Xingming^*

来源：Analytical Sciences, 2011, 27(8): 851-856.

DOI：10.2116/analsci.27.851

• CHEMICAL SENSORS
• ZNO
• PHOTOLUMINESCENCE
• MGO

Carboxymethyl-beta-cyclodextrin (CMCD)-capped ZnO/ZnS/MgO nanocomposites, which combined water-soluble host molecules with multi-shelled nanocrystals, have been prepared. The nanocomposites have good fluorescence performance and host-guest complexation. Thus, a novel fluorescent sensor for the determination of p-nitroaniline based on the molecular recognition of water-soluble CMCD-capped ZnO/ZnS/MgO nanocomposites has been proposed. Factors affecting the p-nitroaniline detection were investigated, and the optimum conditions were determined. Under the optimum conditions, the relative fluorescence intensity of CMCD-capped ZnO/ZnS/MgO nanocomposites was linearly proportional to the concentration of p-nitroaniline over the range from 8.33 x 10(-7) to 5.83 x 10(-5) mol L-1 with a correlation coefficient of 0.9967 and a detection limit of 6.38 x 10(-7) mol L-1. The proposed method was successfully applied to the determination of p-nitroaniline in water samples. The related mechanisms were also discussed.

• 出版日期2011-8
• 单位四川大学