Pyrromethene derivatives in three-component photoinitiating systems for free radical photopolymerization

1,3,5,7,8-pentamethyl pyrromethene difluoroborate complex (HMP) and 2,6-diethyl-8-phenyl-1,3,5,7-tetramethylpyrromethene difluoroborate complex (EPP) were used to initiate the polymerization of a diacrylate in a two- and a three-component photoinitiating system (PIS), together with an amine (ethyl-4...

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Detalles Bibliográficos
Autor principal: Tarzi, Olga Inés
Publicado: 2010
Materias:
Electron transfer
Kinetics
Photochemistry
Photopolymerization
Pyrromethene dye
Triazine
Beneficial effects
Co-initiators
Diacrylates
Dimethylaminobenzoate
Electron transfer kinetics
Electron transfer process
Electron-transfer reactions
Excited singlet state
Fluorescence quantum yield
Fluorescence quenching
Free radical photopolymerization
Laser flash photolysis
Photoinitiating systems
Pyrromethene
Secondary reactions
Steady state
Three-component
Three-component system
Time resolved technique
Time-resolved
Electron transitions
Fluorescence
Free radicals
Metal recovery
Organic compounds
Photolysis
Quantum theory
Reaction intermediates
Secondary recovery
Free radical reactions
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0887624X_v48_n12_p2594_Tarzi
http://hdl.handle.net/20.500.12110/paper_0887624X_v48_n12_p2594_Tarzi
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_0887624X_v48_n12_p2594_Tarzi
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spelling paper:paper_0887624X_v48_n12_p2594_Tarzi2023-06-08T15:46:53Z Pyrromethene derivatives in three-component photoinitiating systems for free radical photopolymerization Tarzi, Olga Inés Electron transfer Kinetics Photochemistry Photopolymerization Pyrromethene dye Triazine Beneficial effects Co-initiators Diacrylates Dimethylaminobenzoate Electron transfer Electron transfer kinetics Electron transfer process Electron-transfer reactions Excited singlet state Fluorescence quantum yield Fluorescence quenching Free radical photopolymerization Laser flash photolysis Photochemistry Photoinitiating systems Pyrromethene Secondary reactions Steady state Three-component Three-component system Time resolved technique Time-resolved Electron transitions Fluorescence Free radicals Metal recovery Organic compounds Photolysis Photopolymerization Quantum theory Reaction intermediates Secondary recovery Free radical reactions 1,3,5,7,8-pentamethyl pyrromethene difluoroborate complex (HMP) and 2,6-diethyl-8-phenyl-1,3,5,7-tetramethylpyrromethene difluoroborate complex (EPP) were used to initiate the polymerization of a diacrylate in a two- and a three-component photoinitiating system (PIS), together with an amine (ethyl-4-dimethylaminobenzoate, EDB) and triazine A (2-(4methoxyphenyl)-4,6- bis(triehloromethyl)-1,3,5-triazine, TA) as coinitiators. For both pyrromethene dyes, the highest conversion was achieved with the three-component PIS. As these dyes have high-fluorescence quantum yields, steady state and time-resolved techniques were used to study the possible fluorescence quenching by the amine and the triazine, as well as laser flash photolysis to investigate the electron transfer process that occurs in these PIS from either the singlet or triplet excited states. The electron transfer reaction is evidenced by using time-resolved photoconductivity. Experiments show that the main interaction between the dye and both coinitiators is through its excited singlet state and the process is more efficient when TA is present. The beneficial effect noted when both coinitiators are used in a three-component system is ascribed to secondary reactions between the coinitiators and intermediates that lead to the generation of higher amount of initiating species and the recovery of the initial dye © 2010 Wiley Periodicals, Inc. Fil:Tarzi, O.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0887624X_v48_n12_p2594_Tarzi http://hdl.handle.net/20.500.12110/paper_0887624X_v48_n12_p2594_Tarzi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Electron transfer
Kinetics
Photochemistry
Photopolymerization
Pyrromethene dye
Triazine
Beneficial effects
Co-initiators
Diacrylates
Dimethylaminobenzoate
Electron transfer
Electron transfer kinetics
Electron transfer process
Electron-transfer reactions
Excited singlet state
Fluorescence quantum yield
Fluorescence quenching
Free radical photopolymerization
Laser flash photolysis
Photochemistry
Photoinitiating systems
Pyrromethene
Secondary reactions
Steady state
Three-component
Three-component system
Time resolved technique
Time-resolved
Electron transitions
Fluorescence
Free radicals
Metal recovery
Organic compounds
Photolysis
Photopolymerization
Quantum theory
Reaction intermediates
Secondary recovery
Free radical reactions
spellingShingle Electron transfer
Kinetics
Photochemistry
Photopolymerization
Pyrromethene dye
Triazine
Beneficial effects
Co-initiators
Diacrylates
Dimethylaminobenzoate
Electron transfer
Electron transfer kinetics
Electron transfer process
Electron-transfer reactions
Excited singlet state
Fluorescence quantum yield
Fluorescence quenching
Free radical photopolymerization
Laser flash photolysis
Photochemistry
Photoinitiating systems
Pyrromethene
Secondary reactions
Steady state
Three-component
Three-component system
Time resolved technique
Time-resolved
Electron transitions
Fluorescence
Free radicals
Metal recovery
Organic compounds
Photolysis
Photopolymerization
Quantum theory
Reaction intermediates
Secondary recovery
Free radical reactions
Tarzi, Olga Inés
Pyrromethene derivatives in three-component photoinitiating systems for free radical photopolymerization
topic_facet Electron transfer
Kinetics
Photochemistry
Photopolymerization
Pyrromethene dye
Triazine
Beneficial effects
Co-initiators
Diacrylates
Dimethylaminobenzoate
Electron transfer
Electron transfer kinetics
Electron transfer process
Electron-transfer reactions
Excited singlet state
Fluorescence quantum yield
Fluorescence quenching
Free radical photopolymerization
Laser flash photolysis
Photochemistry
Photoinitiating systems
Pyrromethene
Secondary reactions
Steady state
Three-component
Three-component system
Time resolved technique
Time-resolved
Electron transitions
Fluorescence
Free radicals
Metal recovery
Organic compounds
Photolysis
Photopolymerization
Quantum theory
Reaction intermediates
Secondary recovery
Free radical reactions
description 1,3,5,7,8-pentamethyl pyrromethene difluoroborate complex (HMP) and 2,6-diethyl-8-phenyl-1,3,5,7-tetramethylpyrromethene difluoroborate complex (EPP) were used to initiate the polymerization of a diacrylate in a two- and a three-component photoinitiating system (PIS), together with an amine (ethyl-4-dimethylaminobenzoate, EDB) and triazine A (2-(4methoxyphenyl)-4,6- bis(triehloromethyl)-1,3,5-triazine, TA) as coinitiators. For both pyrromethene dyes, the highest conversion was achieved with the three-component PIS. As these dyes have high-fluorescence quantum yields, steady state and time-resolved techniques were used to study the possible fluorescence quenching by the amine and the triazine, as well as laser flash photolysis to investigate the electron transfer process that occurs in these PIS from either the singlet or triplet excited states. The electron transfer reaction is evidenced by using time-resolved photoconductivity. Experiments show that the main interaction between the dye and both coinitiators is through its excited singlet state and the process is more efficient when TA is present. The beneficial effect noted when both coinitiators are used in a three-component system is ascribed to secondary reactions between the coinitiators and intermediates that lead to the generation of higher amount of initiating species and the recovery of the initial dye © 2010 Wiley Periodicals, Inc.
author Tarzi, Olga Inés
author_facet Tarzi, Olga Inés
author_sort Tarzi, Olga Inés
title Pyrromethene derivatives in three-component photoinitiating systems for free radical photopolymerization
title_short Pyrromethene derivatives in three-component photoinitiating systems for free radical photopolymerization
title_full Pyrromethene derivatives in three-component photoinitiating systems for free radical photopolymerization
title_fullStr Pyrromethene derivatives in three-component photoinitiating systems for free radical photopolymerization
title_full_unstemmed Pyrromethene derivatives in three-component photoinitiating systems for free radical photopolymerization
title_sort pyrromethene derivatives in three-component photoinitiating systems for free radical photopolymerization
publishDate 2010
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0887624X_v48_n12_p2594_Tarzi
http://hdl.handle.net/20.500.12110/paper_0887624X_v48_n12_p2594_Tarzi
work_keys_str_mv AT tarziolgaines pyrromethenederivativesinthreecomponentphotoinitiatingsystemsforfreeradicalphotopolymerization
_version_ 1768542893293699072

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