吡哌酸的固体表面－延迟荧光法研究

Studies on Solid Surface-Delay Fluorescence of Pipemidic Acid

研究了吡哌酸（ＰＰＡ）的同体表面－延迟荧光特征，实验表明Ｂｅ（Ⅱ）、Ｍｇ（Ⅱ）、Ｃａ（Ⅱ）、Ｓｒ（Ⅱ）、Ｂａ（Ⅱ）及Ｚｎ（Ⅱ）、Ｃｄ（Ⅱ）、Ｌａ（Ⅲ）等无机盐能显著增强ＰＰＡ的固体表面－延迟荧光（ＳＳ－ＤＦ）。ｐＨ值对ＰＰＡ的ＳＳ－ＤＦ有显著影响。寿命测量结果表明，在固体表面ＰＰＡ是以双指数衰减的，同时测量了ＰＰＡ的低温光谱，在本文选择的条件下，ＰＰＡ分析曲线的线性范围为１．８～１８００ｎｇ／斑点。

The solid surface-delayed fluorescence of pipemidic acid was studied. The experiments indicate that inorganic salts,Be(Ⅱ),Mg(Ⅱ),Ca(Ⅱ),Sr(Ⅱ),Ba(Ⅱ) and Zn(Ⅱ),Cd(Ⅱ),La(Ⅱ)etc., can enhance greatly the luminescence signal.The pH value has an obvious effect and the maximum luminescence signal can be obtained at pH 11.3. The measurements of lifetime indicates that PPA decays in the diexponential in the solid surface. The lifetimes are 2.79 ms and 1.70 ms, respectively. The low temperature spectra of PPA were measured and the inorganic salts can also greatly increase low temperature luminescence signal.In this paper, the linear dynamic range of the analytical curve of PPA its 1.8ng- 1800 ng/spot.