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- W1989722607 abstract "The photoexcited triplet states of chlorophyll à and b are studied by the EPR method at ≈85 K using modulated light excitation. Both compounds show anomalous EPR line intensities and transient kinetics, indicating electron spin polarization (ESP) in the photoexcited triplet state. EPR studies, using Mg-tetraphenyl porphyrin (MgTPP) dissolved in n-octane show that ESP occurs also in that solvent. It is shown that the zero field splitting (ZFS) parameters of MgTPP depend strongly on the solvent. From the analysis of the data for chlorophyll a and b we evaluate: (1) the population rate constants (kp); (2) the ratio between the population rate constants (Ap) (p = x, y, z) and, (3) the spin lattice relaxation rate W. In both chlorophylls the in-plane component, x, is predominantly populated and depopulated. The ZFS parameters have been also determined for the above compounds." @default.
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- W1989722607 date "1975-02-01" @default.
- W1989722607 modified "2023-09-23" @default.
- W1989722607 title "EPR study of electron spin polarization in the photoexcited triplet state of chlorophyll a and b" @default.
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- W1989722607 doi "https://doi.org/10.1016/0009-2614(75)80073-x" @default.
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