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Photophysical Parameters, Photodecomposition, Fluorescence Quenching and Convolutive Voltammetry of 7-Diethylaminocoumarin (DEAC) Laser Dye

S. A. El-Daly|I. S. El-Hallag
대한화학회|2010.02|대한화학회지 (Journal of the Korean Chemical Society)|제54권 제1호|pp. 13-22

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키워드

형광FluorescencePhotophysical parametersLaser parametersConvolutive voltammetryElectrochemical parameters광물리적 파라미터레이저 파라미터전기화학적 파라미터
주제분류화학

초록

The photophysical properties of 7-diethylaminocoumarin (DEAC) laser dye have been measured in different solvents. The emission spectrum of DEAC has also been measured in cationic (CTAC) and anionic (SDS) micelles. The laser parameters have been calculated in different solvents namely acetone, dioxane, ethanol and dimethylforamide(DMF). The photoreactivity of DEAC has been studied in CCl4 solvent using 366 nm light. The values of photochemical yield (ϕc) and rate constant (k) are determined. The interaction of organic acceptors such as picric acid (PA), tetracyanoethylene (TCNE) and 7,7,8,8-tetracynoquinonedimethane (TCNQ)with DEAC are also studied using fluorescence measurements in acetonitrile (CH3CN). The electrochemical investigation of (DEAC)has been carried out using cyclic voltammetry and convolutive voltammetry combined with digital simulation technique at a platinum electrode in 0.1 mol L-1 tetrabutyl ammonium perchlorate (TBAP) in CH3CN solvent. The electrochemical parameters of the investigated compound were determined using cyclic and convolutive voltammetry. The extracted electrochemical parameters were verified and confirmed via digital simulation method.

Abstract

The photophysical properties of 7-diethylaminocoumarin (DEAC) laser dye have been measured in different solvents. The emission spectrum of DEAC has also been measured in cationic (CTAC) and anionic (SDS) micelles. The laser parameters have been calculated in different solvents namely acetone, dioxane, ethanol and dimethylforamide(DMF). The photoreactivity of DEAC has been studied in CCl4 solvent using 366 nm light. The values of photochemical yield (ϕc) and rate constant (k) are determined. The interaction of organic acceptors such as picric acid (PA), tetracyanoethylene (TCNE) and 7,7,8,8-tetracynoquinonedimethane (TCNQ)with DEAC are also studied using fluorescence measurements in acetonitrile (CH3CN). The electrochemical investigation of (DEAC)has been carried out using cyclic voltammetry and convolutive voltammetry combined with digital simulation technique at a platinum electrode in 0.1 mol L-1 tetrabutyl ammonium perchlorate (TBAP) in CH3CN solvent. The electrochemical parameters of the investigated compound were determined using cyclic and convolutive voltammetry. The extracted electrochemical parameters were verified and confirmed via digital simulation method.

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