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Singlet oxygen lifetime in polymer films
Author(s) -
Schiller Kurt,
Müller Franz Werner
Publication year - 1991
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4990250105
Subject(s) - singlet oxygen , polymer , singlet state , diffusion , reaction rate constant , molecule , solvent , oxygen , vibrational energy , chemistry , chemical physics , materials science , photochemistry , thermodynamics , polymer chemistry , atomic physics , physics , excited state , kinetics , quantum mechanics , organic chemistry
Abstract Singlet oxygen lifetimes [τ( 1 O 2 )] in polymer matrices were calculated using the strong exponential correlation between the incremental rate constant (K xy ) of energy transfer from 1 O 2 to terminal oscillators X—Y contained in solvent molecules and the energy (E xy ) of the highest fundamental vibration of the oscillator X—Y . The lifetimes in polymers correspond very well to experimental data in the literature. They depend only on the nature and quantity of molecular oscillators in the medium but not on the state of aggregation. The computed lifetimes in common polymers vary only from 10 to 50 μs. Therefore the lifetime of 1 O 2 in singlet oxygen reactions in polymers is of secondary importance in comparison to the diffusion coefficient.