中文摘要：

用再沉淀法制备了一种新型的有机纳米微粒子-杯[4]芳烃纳米粒子（CN），通过透射电镜观察其平均尺寸约为40nm，与杯[4]芳烃分子相比具有较好的荧光性能。在弱酸性条件下，适量的Fe^3＋能使其荧光发生明显猝灭，荧光猝灭值与Fd^3＋的浓度在一定范围内呈良好线性关系，据此建立了一种测定Fe^2＋的荧光新方法。在最优化条件下，测得Fe^3＋的线性范围和检出限分别为1．0×10^-6～2．4×10^-5mol·L^-1和3．1×10^-7mol·L^-1。将其应用于水样中三价铁离子的定量分析，回收率和相对标准偏差都令人满意。

英文摘要：

Novel organic nanoparticles of calix[4]arene （CN） were prepared by the reprecipitation method under sonication and vigorous stirring. The nanoparticles showed an average diameter of 40 nm characterized by transmission electron microscopy. It was found that the nanoparticles exhibited better fluorescence compared with that of monomer. In weak acidic medium, the relative fluorescence intensity of these nanoparticles could be quenched remarkably with the addition of appropriate amounts of Fe^3＋. Based on the obtained results, a novel fluorimetric method has been developed for the rapid determination of Fe^3＋. Under optimal conditions, the linear range of calibration curves was 10^-6～2.4×10^-5mol·L^-1 and the detection limit was 3.1×10^-7mol·L^-1. The proposed method was applied to determine Fe^3＋ in water samples with satisfactory recovery and relative standard deviation.