ELECTRON SPIN RESONANCE STUDIES IN ACRYLAMIDE POLYMERIZATION USING RHENIUM COMPLEXES AS PHOTOSENSITIZERS

Acrylamide can be polymerized using new catalytic systems. These are based on rhenium complexes as photosensitizers with triethylamine (TEA). Electron Spin Resonance (ESR) was used for the detection of radicals species which were formed in the polymerization process. Also, we used Spin Trapping to c...

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Autores principales:	OLEA AZAR,C., TERRAZA,C.A., GUERRERO,J., RIGOL,C., RECABARREN,G.
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2002
Materias:	ESR polymerization acrylamide Re complexes Spin Trapping
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0366-16442002000300004
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id	oai:scielo:S0366-16442002000300004
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spelling	oai:scielo:S0366-164420020003000042014-08-20ELECTRON SPIN RESONANCE STUDIES IN ACRYLAMIDE POLYMERIZATION USING RHENIUM COMPLEXES AS PHOTOSENSITIZERSOLEA AZAR,C.TERRAZA,C.A.GUERRERO,J.RIGOL,C.RECABARREN,G. ESR polymerization acrylamide Re complexes Spin Trapping Acrylamide can be polymerized using new catalytic systems. These are based on rhenium complexes as photosensitizers with triethylamine (TEA). Electron Spin Resonance (ESR) was used for the detection of radicals species which were formed in the polymerization process. Also, we used Spin Trapping to confirm the presence of the acrylamide radical. AM1 and INDO calculations were performed to obtain the optimized geometries and theoretical hyperfine constants of the acrylamide radical. Our results agree with a cyclic process where triethylamine is an electron donor agent reacting with an excited rhenium complex. In this system, we postulate the [Re(II)(CO)3L.-(CF3 SO3)]* as the activated species in the catalytic polymerization of acrylamideinfo:eu-repo/semantics/openAccessSociedad Chilena de QuímicaBoletín de la Sociedad Chilena de Química v.47 n.3 20022002-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0366-16442002000300004en10.4067/S0366-16442002000300004
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	ESR polymerization acrylamide Re complexes Spin Trapping
spellingShingle	ESR polymerization acrylamide Re complexes Spin Trapping OLEA AZAR,C. TERRAZA,C.A. GUERRERO,J. RIGOL,C. RECABARREN,G. ELECTRON SPIN RESONANCE STUDIES IN ACRYLAMIDE POLYMERIZATION USING RHENIUM COMPLEXES AS PHOTOSENSITIZERS
description	Acrylamide can be polymerized using new catalytic systems. These are based on rhenium complexes as photosensitizers with triethylamine (TEA). Electron Spin Resonance (ESR) was used for the detection of radicals species which were formed in the polymerization process. Also, we used Spin Trapping to confirm the presence of the acrylamide radical. AM1 and INDO calculations were performed to obtain the optimized geometries and theoretical hyperfine constants of the acrylamide radical. Our results agree with a cyclic process where triethylamine is an electron donor agent reacting with an excited rhenium complex. In this system, we postulate the [Re(II)(CO)3L.-(CF3 SO3)]* as the activated species in the catalytic polymerization of acrylamide
author	OLEA AZAR,C. TERRAZA,C.A. GUERRERO,J. RIGOL,C. RECABARREN,G.
author_facet	OLEA AZAR,C. TERRAZA,C.A. GUERRERO,J. RIGOL,C. RECABARREN,G.
author_sort	OLEA AZAR,C.
title	ELECTRON SPIN RESONANCE STUDIES IN ACRYLAMIDE POLYMERIZATION USING RHENIUM COMPLEXES AS PHOTOSENSITIZERS
title_short	ELECTRON SPIN RESONANCE STUDIES IN ACRYLAMIDE POLYMERIZATION USING RHENIUM COMPLEXES AS PHOTOSENSITIZERS
title_full	ELECTRON SPIN RESONANCE STUDIES IN ACRYLAMIDE POLYMERIZATION USING RHENIUM COMPLEXES AS PHOTOSENSITIZERS
title_fullStr	ELECTRON SPIN RESONANCE STUDIES IN ACRYLAMIDE POLYMERIZATION USING RHENIUM COMPLEXES AS PHOTOSENSITIZERS
title_full_unstemmed	ELECTRON SPIN RESONANCE STUDIES IN ACRYLAMIDE POLYMERIZATION USING RHENIUM COMPLEXES AS PHOTOSENSITIZERS
title_sort	electron spin resonance studies in acrylamide polymerization using rhenium complexes as photosensitizers
publisher	Sociedad Chilena de Química
publishDate	2002
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0366-16442002000300004
work_keys_str_mv	AT oleaazarc electronspinresonancestudiesinacrylamidepolymerizationusingrheniumcomplexesasphotosensitizers AT terrazaca electronspinresonancestudiesinacrylamidepolymerizationusingrheniumcomplexesasphotosensitizers AT guerreroj electronspinresonancestudiesinacrylamidepolymerizationusingrheniumcomplexesasphotosensitizers AT rigolc electronspinresonancestudiesinacrylamidepolymerizationusingrheniumcomplexesasphotosensitizers AT recabarreng electronspinresonancestudiesinacrylamidepolymerizationusingrheniumcomplexesasphotosensitizers
_version_	1718438147026583552

ELECTRON SPIN RESONANCE STUDIES IN ACRYLAMIDE POLYMERIZATION USING RHENIUM COMPLEXES AS PHOTOSENSITIZERS

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