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- W2074057083 abstract "Site-selection spectra of title compounds in different frozen solvents at 5K have been obtained: fluorescence spectra on selective excitation in vibronic as well as in the O-O absorption region and excitation spectra with narrow-band fluorescence recording. Frequencies of vibrational modes active in fluorescence and excitation spectra of bacteriochlorophyll a (BChl) and its metal-free derivative have been determined from these fine-line spectra. Most favourable vibronic line-to-background intensity ratios have been found in non-polar aprotic glassy environments (triethylamine, di-iso-amylether). The intensity of zero-phonon lines in microcrystallic protic matrices was low, indicating strong electron-phonon coupling. The vibrational frequencies of the excited electronic state characteristic of axially (at Mg atom) mono- and disolvated BChl species have been identified. Narrow spectral holes of about 20% of the initial absorption could be burned with ≈10-4 quantum yield within the O-O band of BChl and bacteriopheophytin." @default.
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- W2074057083 date "1987-08-01" @default.
- W2074057083 modified "2023-09-26" @default.
- W2074057083 title "Site-selection optical spectra of bacteriochlorophyll and bacteriopheophytin in frozen solutions" @default.
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- W2074057083 doi "https://doi.org/10.1016/0022-2313(87)90161-x" @default.
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