Studies on Solid Surface-Delay Fluorescence of Pipemidic Acid

Abstract

Abstract: 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 pHvalue 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 PPAwere 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 PPAits 1.8ng-1800 ng/spot.

Key words: Solid surface-delayed fluorescence, Low temperature spectra, Lifetime, Pipemidic acid

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JIN Wei-Jun, CHEN Su-E, FAN Yan-Ping, LIU Chang-Song . Studies on Solid Surface-Delay Fluorescence of Pipemidic Acid[J]. Chem. J. Chinese Universities, 1995, 16(3): 363.

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Studies on Solid Surface-Delay Fluorescence of Pipemidic Acid

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