Thermal deactivation of the lowest singlet and triplet excited states of acridine dyes in poly(vinyl alcohol) films

Ignacy Gryczyński; Alfons Kawski; Kazimierz Nowaczyk; Henryk Cherek

doi:10.1016/0047-2670(85)85095-4

Thermal deactivation of the lowest singlet and triplet excited states of acridine dyes in poly(vinyl alcohol) films

Ignacy Gryczyński, Alfons Kawski, Kazimierz Nowaczyk, Henryk Cherek

Research output: Contribution to journal › Article

9 Scopus citations

Abstract

Measurements of the mean fluorescence lifetime τ_F, the lifetimes τ_DF of the delayed fluorescence, the phosphorescence lifetime τ_P, the fluorescence quantum yields Ø_F, and the ratios of the phosphorescence and the delayed fluorescence quantum yields Ø_P and Ø_DF respectively, to the fluorescence quantum yield Ø_F were carried out for three acridine dyes: acridine yellow, acridine orange and proflavine in poly(vinyl alcohol) films as a function of temperature. From these measurements, rate constants were determined for the radiative and radiationless transitions for both the lowest singlet excited state S₁ and the triplet state T₁. The temperature dependence of the efficiency Ø_T of the population of the triplet state was also examined.

Original language	English
Pages (from-to)	265-272
Number of pages	8
Journal	Journal of Photochemistry
Volume	31
Issue number	2-3
DOIs	https://doi.org/10.1016/0047-2670(85)85095-4
State	Published - Dec 1985

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Gryczyński, I., Kawski, A., Nowaczyk, K., & Cherek, H. (1985). Thermal deactivation of the lowest singlet and triplet excited states of acridine dyes in poly(vinyl alcohol) films. Journal of Photochemistry, 31(2-3), 265-272. https://doi.org/10.1016/0047-2670(85)85095-4

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AU - Gryczyński, Ignacy

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AU - Nowaczyk, Kazimierz

AU - Cherek, Henryk

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AB - Measurements of the mean fluorescence lifetime τF, the lifetimes τDF of the delayed fluorescence, the phosphorescence lifetime τP, the fluorescence quantum yields ØF, and the ratios of the phosphorescence and the delayed fluorescence quantum yields ØP and ØDF respectively, to the fluorescence quantum yield ØF were carried out for three acridine dyes: acridine yellow, acridine orange and proflavine in poly(vinyl alcohol) films as a function of temperature. From these measurements, rate constants were determined for the radiative and radiationless transitions for both the lowest singlet excited state S1 and the triplet state T1. The temperature dependence of the efficiency ØT of the population of the triplet state was also examined.

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