CARBOXYLATED ZINC‐PHTHALOCYANINE, INFLUENCE OF DIMERIZATION ON THE SPECTROSCOPIC PROPERTIES. AN ABSORPTION, EMISSION, AND THERMAL LENSING STUDY

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Monomer and dimer absorption and emission spectra, and dimerization constants are reported for the diamide of the zinc‐tetracarboxyphthalocyanine in pure dimethylformamide (DMF) and in H2O/DMF mixtures at room temperature. The dimerization constant increases steadily with the water content. The mono...

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Autores principales: NEGRI, R.M., ZALTS, A., SAN ROMáN, E.A., ARAMENDíA, P.F., BRASLAVSKY, S.E.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00318655_v53_n3_p317_NEGRI
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00318655_v53_n3_p317_NEGRI
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spelling todo:paper_00318655_v53_n3_p317_NEGRI2023-10-03T14:41:31Z CARBOXYLATED ZINC‐PHTHALOCYANINE, INFLUENCE OF DIMERIZATION ON THE SPECTROSCOPIC PROPERTIES. AN ABSORPTION, EMISSION, AND THERMAL LENSING STUDY NEGRI, R.M. ZALTS, A. SAN ROMáN, E.A. ARAMENDíA, P.F. BRASLAVSKY, S.E. Monomer and dimer absorption and emission spectra, and dimerization constants are reported for the diamide of the zinc‐tetracarboxyphthalocyanine in pure dimethylformamide (DMF) and in H2O/DMF mixtures at room temperature. The dimerization constant increases steadily with the water content. The monomer absorption Q‐band is insensitive to the solvent composition, whereas dimer spectra show great variations with the water content. Stationary emission measurements show that fluorescence originates exclusively from the monomers. The fluorescence spectrum as well as its absolute fluorescence quantum yield, measured by steady‐state thermal lensing, are also insensitive to the solvent composition. The thermal lensing method is discussed for the case of two absorbing species in equilibrium. Copyright © 1991, Wiley Blackwell. All rights reserved Fil:NEGRI, R.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:ZALTS, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:SAN ROMáN, E.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:ARAMENDíA, P.F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:BRASLAVSKY, S.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00318655_v53_n3_p317_NEGRI
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Monomer and dimer absorption and emission spectra, and dimerization constants are reported for the diamide of the zinc‐tetracarboxyphthalocyanine in pure dimethylformamide (DMF) and in H2O/DMF mixtures at room temperature. The dimerization constant increases steadily with the water content. The monomer absorption Q‐band is insensitive to the solvent composition, whereas dimer spectra show great variations with the water content. Stationary emission measurements show that fluorescence originates exclusively from the monomers. The fluorescence spectrum as well as its absolute fluorescence quantum yield, measured by steady‐state thermal lensing, are also insensitive to the solvent composition. The thermal lensing method is discussed for the case of two absorbing species in equilibrium. Copyright © 1991, Wiley Blackwell. All rights reserved
format JOUR
author NEGRI, R.M.
ZALTS, A.
SAN ROMáN, E.A.
ARAMENDíA, P.F.
BRASLAVSKY, S.E.
spellingShingle NEGRI, R.M.
ZALTS, A.
SAN ROMáN, E.A.
ARAMENDíA, P.F.
BRASLAVSKY, S.E.
CARBOXYLATED ZINC‐PHTHALOCYANINE, INFLUENCE OF DIMERIZATION ON THE SPECTROSCOPIC PROPERTIES. AN ABSORPTION, EMISSION, AND THERMAL LENSING STUDY
author_facet NEGRI, R.M.
ZALTS, A.
SAN ROMáN, E.A.
ARAMENDíA, P.F.
BRASLAVSKY, S.E.
author_sort NEGRI, R.M.
title CARBOXYLATED ZINC‐PHTHALOCYANINE, INFLUENCE OF DIMERIZATION ON THE SPECTROSCOPIC PROPERTIES. AN ABSORPTION, EMISSION, AND THERMAL LENSING STUDY
title_short CARBOXYLATED ZINC‐PHTHALOCYANINE, INFLUENCE OF DIMERIZATION ON THE SPECTROSCOPIC PROPERTIES. AN ABSORPTION, EMISSION, AND THERMAL LENSING STUDY
title_full CARBOXYLATED ZINC‐PHTHALOCYANINE, INFLUENCE OF DIMERIZATION ON THE SPECTROSCOPIC PROPERTIES. AN ABSORPTION, EMISSION, AND THERMAL LENSING STUDY
title_fullStr CARBOXYLATED ZINC‐PHTHALOCYANINE, INFLUENCE OF DIMERIZATION ON THE SPECTROSCOPIC PROPERTIES. AN ABSORPTION, EMISSION, AND THERMAL LENSING STUDY
title_full_unstemmed CARBOXYLATED ZINC‐PHTHALOCYANINE, INFLUENCE OF DIMERIZATION ON THE SPECTROSCOPIC PROPERTIES. AN ABSORPTION, EMISSION, AND THERMAL LENSING STUDY
title_sort carboxylated zinc‐phthalocyanine, influence of dimerization on the spectroscopic properties. an absorption, emission, and thermal lensing study
url http://hdl.handle.net/20.500.12110/paper_00318655_v53_n3_p317_NEGRI
work_keys_str_mv AT negrirm carboxylatedzincphthalocyanineinfluenceofdimerizationonthespectroscopicpropertiesanabsorptionemissionandthermallensingstudy
AT zaltsa carboxylatedzincphthalocyanineinfluenceofdimerizationonthespectroscopicpropertiesanabsorptionemissionandthermallensingstudy
AT sanromanea carboxylatedzincphthalocyanineinfluenceofdimerizationonthespectroscopicpropertiesanabsorptionemissionandthermallensingstudy
AT aramendiapf carboxylatedzincphthalocyanineinfluenceofdimerizationonthespectroscopicpropertiesanabsorptionemissionandthermallensingstudy
AT braslavskyse carboxylatedzincphthalocyanineinfluenceofdimerizationonthespectroscopicpropertiesanabsorptionemissionandthermallensingstudy
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