基于维生素B_1荧光铜纳米团簇的制备与猝灭型Fe^(3+)传感器的应用

Preparation of Fluorescent Copper Nanoclusters Based on Vitamin B_1 and Application of Quenched Fe^(3+) Sensor

金属纳米团簇因其独特的性质,在光电器件、催化、传感、生物成像等领域有广泛的应用.本文以维生素B_1为保护剂制备具有蓝色荧光的铜纳米团簇,并详细探究了铜纳米团簇的最佳合成条件及产物的激发波长依赖性、选择性、pH响应性、离子检测等.实验表明,Fe^(3+)能使铜纳米团簇的荧光强度显著减弱,根据荧光强度与Fe^(3+)浓度间良好的线性关系,研制出信号猝灭型Fe^(3+)传感器,线性范围为0.025～12.5 μM,检出限为9.6 nM.

Metal nanoclusters have been widely used in optoelectronic devices, catalysis, sensing, bioimaging and other fields due to their unique properties. In this paper, copper nanoclusters with blue fluorescence were prepared by using vitamin B1 as a protective agent, and the optimum synthesis conditions, excitation wavelength dependence, selectivity, pH responsiveness and ion detection of copper nanoclusters were investigated in detail. The experimental results show that the fluorescence intensity of copper nanoclusters can be significantly reduced by Fe3+. According to the good linear relationship between the fluorescence intensity and the concentration of Fe3+, a signal quenching Fe3+ sensor has been developed. The linear range is 0.025-12.5 μM, and the detection limit is 9.6 nM.