ELECTROCHEMICAL AND SPECTROSCOPIC PROPERTIES OF INDOLIZINO[1,2-B] QUINOLE DERIVATES

A series of indolizino[1,2-b] quinole derivates compounds were characterized by various electrochemical and spectroscopic techniques. Electrochemical studies reveal that there are two redox processes controlled by diffusion, the first step corresponds to the formation of a semiquinone radical Q--, w...

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Autores principales:	ALCALDE,Mª JOSÉ, MOLERO,LEONARD, CAÑETE,ALVARO, DEL RÍO,RODRIGO, DEL VALLE,MªANGÉLICA, MALLAVIA,RICARDO, ARMIJO,FRANCISCO
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2013
Materias:	Indolequinone Quinone Electrochemical Characterization Optical Absorption Fluorescence Emission
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072013000400014
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spelling	oai:scielo:S0717-970720130004000142014-09-02ELECTROCHEMICAL AND SPECTROSCOPIC PROPERTIES OF INDOLIZINO[1,2-B] QUINOLE DERIVATESALCALDE,Mª JOSÉMOLERO,LEONARDCAÑETE,ALVARODEL RÍO,RODRIGODEL VALLE,MªANGÉLICAMALLAVIA,RICARDOARMIJO,FRANCISCO Indolequinone Quinone Electrochemical Characterization Optical Absorption Fluorescence Emission A series of indolizino[1,2-b] quinole derivates compounds were characterized by various electrochemical and spectroscopic techniques. Electrochemical studies reveal that there are two redox processes controlled by diffusion, the first step corresponds to the formation of a semiquinone radical Q--, while the second step corresponds to the formation of quinone dianion, Q2--. The presence of acceptor groups such as -CN and -COOH shifted reduction potentials, due to a more favorable electronic stabilization. There was no significant effect of the substituents on the absorption spectra of indolizino[1,2-b] quinole derivates. The substituents influenced the fluorescence properties from indolizino[1,2-b] quinole derivates. The emission and excitation spectra obtained of these compounds suggested that the molecule emits from a locally excited state having identical geometry with that of ground state geometry. Finally it was observed that the group with higher acceptor capacity (-CN), has the highest quantum yield, which is indicating that this group always stabilized electronic state with a higher conjugation.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.58 n.4 20132013-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072013000400014en10.4067/S0717-97072013000400014
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Indolequinone Quinone Electrochemical Characterization Optical Absorption Fluorescence Emission
spellingShingle	Indolequinone Quinone Electrochemical Characterization Optical Absorption Fluorescence Emission ALCALDE,Mª JOSÉ MOLERO,LEONARD CAÑETE,ALVARO DEL RÍO,RODRIGO DEL VALLE,MªANGÉLICA MALLAVIA,RICARDO ARMIJO,FRANCISCO ELECTROCHEMICAL AND SPECTROSCOPIC PROPERTIES OF INDOLIZINO[1,2-B] QUINOLE DERIVATES
description	A series of indolizino[1,2-b] quinole derivates compounds were characterized by various electrochemical and spectroscopic techniques. Electrochemical studies reveal that there are two redox processes controlled by diffusion, the first step corresponds to the formation of a semiquinone radical Q--, while the second step corresponds to the formation of quinone dianion, Q2--. The presence of acceptor groups such as -CN and -COOH shifted reduction potentials, due to a more favorable electronic stabilization. There was no significant effect of the substituents on the absorption spectra of indolizino[1,2-b] quinole derivates. The substituents influenced the fluorescence properties from indolizino[1,2-b] quinole derivates. The emission and excitation spectra obtained of these compounds suggested that the molecule emits from a locally excited state having identical geometry with that of ground state geometry. Finally it was observed that the group with higher acceptor capacity (-CN), has the highest quantum yield, which is indicating that this group always stabilized electronic state with a higher conjugation.
author	ALCALDE,Mª JOSÉ MOLERO,LEONARD CAÑETE,ALVARO DEL RÍO,RODRIGO DEL VALLE,MªANGÉLICA MALLAVIA,RICARDO ARMIJO,FRANCISCO
author_facet	ALCALDE,Mª JOSÉ MOLERO,LEONARD CAÑETE,ALVARO DEL RÍO,RODRIGO DEL VALLE,MªANGÉLICA MALLAVIA,RICARDO ARMIJO,FRANCISCO
author_sort	ALCALDE,Mª JOSÉ
title	ELECTROCHEMICAL AND SPECTROSCOPIC PROPERTIES OF INDOLIZINO[1,2-B] QUINOLE DERIVATES
title_short	ELECTROCHEMICAL AND SPECTROSCOPIC PROPERTIES OF INDOLIZINO[1,2-B] QUINOLE DERIVATES
title_full	ELECTROCHEMICAL AND SPECTROSCOPIC PROPERTIES OF INDOLIZINO[1,2-B] QUINOLE DERIVATES
title_fullStr	ELECTROCHEMICAL AND SPECTROSCOPIC PROPERTIES OF INDOLIZINO[1,2-B] QUINOLE DERIVATES
title_full_unstemmed	ELECTROCHEMICAL AND SPECTROSCOPIC PROPERTIES OF INDOLIZINO[1,2-B] QUINOLE DERIVATES
title_sort	electrochemical and spectroscopic properties of indolizino[1,2-b] quinole derivates
publisher	Sociedad Chilena de Química
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072013000400014
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ELECTROCHEMICAL AND SPECTROSCOPIC PROPERTIES OF INDOLIZINO[1,2-B] QUINOLE DERIVATES

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