Photochemical reaction mechanisms and kinetics with molecular nanocrystals: surface quenching of triplet benzophenone nanocrystals

Organic molecular nanocrystals suspended in water are useful when studying reactions that occur in the solid state because they retain not only the reactive and supramolecular properties of bulk crystals, but are also amenable to transmission spectroscopy. Having previously studied the triplet state...

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Autores principales: Simoncelli, S., Kuzmanich, G., Gard, M.N., Garcia-Garibay, M.A.
Formato: JOUR
Materias:
Benzophenone
Nanocrystalline
Nanosecond flash photolysis
Particle size
Solid-state reaction kinetics
Surface quenching
Bulk crystals
Deuterations
Electronic excitation
Flash photolysis
Laser flash photolysis
Nanocrystallines
Quenching rate
Stern-volmer analysis
Supramolecular properties
Transmission spectroscopy
Triplet state
Anionic surfactants
Association reactions
Cationic surfactants
Deuterium
Dissolution
Dissolved oxygen
Dyes
Nanocrystals
Photolysis
Quenching
Solid state reactions
Supramolecular chemistry
Surface reactions
Reaction kinetics
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_08943230_v23_n4_p376_Simoncelli
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_08943230_v23_n4_p376_Simoncelli2023-10-03T15:42:03Z Photochemical reaction mechanisms and kinetics with molecular nanocrystals: surface quenching of triplet benzophenone nanocrystals Simoncelli, S. Kuzmanich, G. Gard, M.N. Garcia-Garibay, M.A. Benzophenone Nanocrystalline Nanosecond flash photolysis Particle size Solid-state reaction kinetics Surface quenching Bulk crystals Deuterations Electronic excitation Flash photolysis Laser flash photolysis Nanocrystalline Nanocrystallines Quenching rate Stern-volmer analysis Supramolecular properties Surface quenching Transmission spectroscopy Triplet state Anionic surfactants Association reactions Cationic surfactants Deuterium Dissolution Dissolved oxygen Dyes Nanocrystals Photolysis Quenching Solid state reactions Supramolecular chemistry Surface reactions Reaction kinetics Organic molecular nanocrystals suspended in water are useful when studying reactions that occur in the solid state because they retain not only the reactive and supramolecular properties of bulk crystals, but are also amenable to transmission spectroscopy. Having previously studied the triplet state of benzophenone nanocrystals by laser flash photolysis transmission spectroscopy, we now report nanosecond experiments in the presence of several possible quenchers: anionic and cationic surfactants, dissolved oxygen, and as a function of solvent deuteration (H2O and D2O). After finding these to have no effect, several anionic quenchers (IS, BrS, and NS3) were tested by Stern-Volmer analysis. Significant correlation between the quenching rates in solution and in nanocrystals suggests that the electronic excitation is accessible to quenchers at the surface. © 2010 John Wiley & Sons, Ltd. Fil:Simoncelli, S. 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_08943230_v23_n4_p376_Simoncelli
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Benzophenone
Nanocrystalline
Nanosecond flash photolysis
Particle size
Solid-state reaction kinetics
Surface quenching
Bulk crystals
Deuterations
Electronic excitation
Flash photolysis
Laser flash photolysis
Nanocrystalline
Nanocrystallines
Quenching rate
Stern-volmer analysis
Supramolecular properties
Surface quenching
Transmission spectroscopy
Triplet state
Anionic surfactants
Association reactions
Cationic surfactants
Deuterium
Dissolution
Dissolved oxygen
Dyes
Nanocrystals
Photolysis
Quenching
Solid state reactions
Supramolecular chemistry
Surface reactions
Reaction kinetics
spellingShingle Benzophenone
Nanocrystalline
Nanosecond flash photolysis
Particle size
Solid-state reaction kinetics
Surface quenching
Bulk crystals
Deuterations
Electronic excitation
Flash photolysis
Laser flash photolysis
Nanocrystalline
Nanocrystallines
Quenching rate
Stern-volmer analysis
Supramolecular properties
Surface quenching
Transmission spectroscopy
Triplet state
Anionic surfactants
Association reactions
Cationic surfactants
Deuterium
Dissolution
Dissolved oxygen
Dyes
Nanocrystals
Photolysis
Quenching
Solid state reactions
Supramolecular chemistry
Surface reactions
Reaction kinetics
Simoncelli, S.
Kuzmanich, G.
Gard, M.N.
Garcia-Garibay, M.A.
Photochemical reaction mechanisms and kinetics with molecular nanocrystals: surface quenching of triplet benzophenone nanocrystals
topic_facet Benzophenone
Nanocrystalline
Nanosecond flash photolysis
Particle size
Solid-state reaction kinetics
Surface quenching
Bulk crystals
Deuterations
Electronic excitation
Flash photolysis
Laser flash photolysis
Nanocrystalline
Nanocrystallines
Quenching rate
Stern-volmer analysis
Supramolecular properties
Surface quenching
Transmission spectroscopy
Triplet state
Anionic surfactants
Association reactions
Cationic surfactants
Deuterium
Dissolution
Dissolved oxygen
Dyes
Nanocrystals
Photolysis
Quenching
Solid state reactions
Supramolecular chemistry
Surface reactions
Reaction kinetics
description Organic molecular nanocrystals suspended in water are useful when studying reactions that occur in the solid state because they retain not only the reactive and supramolecular properties of bulk crystals, but are also amenable to transmission spectroscopy. Having previously studied the triplet state of benzophenone nanocrystals by laser flash photolysis transmission spectroscopy, we now report nanosecond experiments in the presence of several possible quenchers: anionic and cationic surfactants, dissolved oxygen, and as a function of solvent deuteration (H2O and D2O). After finding these to have no effect, several anionic quenchers (IS, BrS, and NS3) were tested by Stern-Volmer analysis. Significant correlation between the quenching rates in solution and in nanocrystals suggests that the electronic excitation is accessible to quenchers at the surface. © 2010 John Wiley & Sons, Ltd.
format JOUR
author Simoncelli, S.
Kuzmanich, G.
Gard, M.N.
Garcia-Garibay, M.A.
author_facet Simoncelli, S.
Kuzmanich, G.
Gard, M.N.
Garcia-Garibay, M.A.
author_sort Simoncelli, S.
title Photochemical reaction mechanisms and kinetics with molecular nanocrystals: surface quenching of triplet benzophenone nanocrystals
title_short Photochemical reaction mechanisms and kinetics with molecular nanocrystals: surface quenching of triplet benzophenone nanocrystals
title_full Photochemical reaction mechanisms and kinetics with molecular nanocrystals: surface quenching of triplet benzophenone nanocrystals
title_fullStr Photochemical reaction mechanisms and kinetics with molecular nanocrystals: surface quenching of triplet benzophenone nanocrystals
title_full_unstemmed Photochemical reaction mechanisms and kinetics with molecular nanocrystals: surface quenching of triplet benzophenone nanocrystals
title_sort photochemical reaction mechanisms and kinetics with molecular nanocrystals: surface quenching of triplet benzophenone nanocrystals
url http://hdl.handle.net/20.500.12110/paper_08943230_v23_n4_p376_Simoncelli
work_keys_str_mv AT simoncellis photochemicalreactionmechanismsandkineticswithmolecularnanocrystalssurfacequenchingoftripletbenzophenonenanocrystals
AT kuzmanichg photochemicalreactionmechanismsandkineticswithmolecularnanocrystalssurfacequenchingoftripletbenzophenonenanocrystals
AT gardmn photochemicalreactionmechanismsandkineticswithmolecularnanocrystalssurfacequenchingoftripletbenzophenonenanocrystals
AT garciagaribayma photochemicalreactionmechanismsandkineticswithmolecularnanocrystalssurfacequenchingoftripletbenzophenonenanocrystals
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