1. Photochemistry of sulfosalicylic acid in aqueous solutions
- Author
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Dmitry Yu. Vorobyev, Victor F. Plyusnin, Vjacheslav P. Grivin, Helge Lemmetyinen, Aleksandr I. Kruppa, and Ivan P. Pozdnyakov
- Subjects
Sulfosalicylic acid ,Chemistry ,CIDNP ,General Chemical Engineering ,General Physics and Astronomy ,General Chemistry ,Photoionization ,Photochemistry ,Fluorescence ,chemistry.chemical_compound ,Absorption band ,Excited state ,Flash photolysis ,Spectroscopy - Abstract
Nanosecond laser flash photolysis (XeCl, 308 nm), optical spectroscopy, fluorescence, and time-resolved chemically induced nuclear polarization (CIDNP) were used to determine photophysical and photochemical processes for 5-sulfosalicylic acid dianion (HSSA2−) in aqueous solutions and frozen matrices. The triplet–triplet absorption (TTA) band with a maximum at 470 nm was recorded under excitation in the region of the long-wave absorption band of dianion (λmax=300 nm). For high laser pulse intensities, a two-quantum formation of an aquated electron is observed. CIDNP in solutions and flash photolysis in frozen matrices, with preliminary excitation to populate T1 state, indicate that photoionization occurs during absorption of a second quantum by an excited singlet S1 state. The spectral and kinetic characteristics of the excited states of dianion and aquated electron were determined.
- Published
- 2004
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