Quantum yield of singlet molecular oxygen sensitization by copper(II) tetracarboxyphthalocy anine

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The quantum yield φΔ for sensitization of singlet molecular oxygen, O2(1Δg), by copper(II) tetracarboxyphthalocyanine (CuTCPc) in dimethyl sulphoxide was determined under stationary illumination, using diphenyl-isobenzofurane as chemical quencher. A constant value of φΔ = 0.16 ± 0.03 was obtained, i...

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Detalles Bibliográficos
Autores principales: Lagorio, M.G., Dicelio, L.E., San Román, E.A., Braslavsky, S.E.
Formato: JOUR
Materias:
Copper(II) tetracarboxyphthalocyanine
quantum yield
singlet molecular oxygen
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_10111344_v3_n4_p615_Lagorio
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:The quantum yield φΔ for sensitization of singlet molecular oxygen, O2(1Δg), by copper(II) tetracarboxyphthalocyanine (CuTCPc) in dimethyl sulphoxide was determined under stationary illumination, using diphenyl-isobenzofurane as chemical quencher. A constant value of φΔ = 0.16 ± 0.03 was obtained, independent of sensitizer concentration in the range 2-26 μM even though dimers and possibly oligomers are present at the highest concentrations. The monomer and the aggregates of CuTCPc physically quench O2(1Δg) with a nearly diffusional rate constant. © 1989.

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