Laser induced singlet-oxygen-sensitised delayed fluorescence of dyes in aqueous solutions

Journal Article · Thu Jan 31 00:00:00 EST 2002 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2002V032N01ABEH002132· OSTI ID:21454758

Krasnovskii, A A; Bashtanov, M E; Drozdova, N N ^[1]; Yuzhakova, O A; Luk'yanets, Evgenii A ^[2]

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1. A.N. Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow (Russian Federation)
2. Russian Research Centre 'Research Institute of Organic Intermediates and Dyes', Moscow (Russian Federation)

It is shown that water-soluble derivatives of phthalocyanines - poly(diethoxyphosphinylmethyl)substituted aluminium phthalocyanines - emit intense singlet-oxygen-sensitised delayed fluorescence upon laser-induced formation of singlet oxygen in air-saturated aqueous (D{sub 2}O) solutions. The delayed fluorescence is emitted by the dye molecules which accepted energy from two molecules of singlet oxygen. The quantum efficiency of delayed fluorescence in aerated D{sub 2}O of the chloroaluminium complex of octa(diethoxyphosphinylmethyl) phthalocyanine corresponds to the rate constant of population of excited dye molecules which is equal to (5.5 {+-} 3) x 10{sup 12} mole{sup -2} L{sup 2} s{sup -1}. This value is only an order of magnitude smaller than that for tetra(4-tert.-butyl)phthalocyanine earlier studied in aerated organic solvents. It is shown that these phthalocyanine derivatives can be used as highly sensitive luminescence indicators of singlet oxygen produced in aqueous solutions of different compounds upon laser excitation. (laser applications and other topics in quantum electronics)

• OSTI ID: 21454758
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Vol. 32, Issue 1; Other Information: DOI: 10.1070/QE2002v032n01ABEH002132; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALUMINIUM COMPOUNDS
AQUEOUS SOLUTIONS
DYES
EXCITATION
FLUORESCENCE
HEAVY WATER
LASERS
MOLECULES
ORGANIC SOLVENTS
OXYGEN
PHTHALOCYANINES
QUANTUM EFFICIENCY
REACTION KINETICS
DEUTERIUM COMPOUNDS
DISPERSIONS
EFFICIENCY
ELEMENTS
EMISSION
ENERGY-LEVEL TRANSITIONS
HETEROCYCLIC COMPOUNDS
HOMOGENEOUS MIXTURES
HYDROGEN COMPOUNDS
KINETICS
LUMINESCENCE
MIXTURES
NONAQUEOUS SOLVENTS
NONMETALS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHOTON EMISSION
SOLUTIONS
SOLVENTS
WATER