Excited-state reaction dynamics of bacteriorhodopsin studied by femtosecond spectroscopy
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چکیده
منابع مشابه
Excited-state Reaction Dynamics of Bacteriobhodopsin Studied by Femtosecond Spectroscopy
The photodynamics of bacteriorhodopsin were studied by transient absorption and gain measurements after excitation with femtosecond pulses at 620 nm. With probing pulses at longer wavelengths (A> 770 nm) the previously reported formation of the J intermediate (with a time constant of 500f 100 fs) was confirmed. With probing pulses around 700 nm, a faster process with a relaxation time of 200 rt...
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متن کاملFemtosecond stimulated Raman study of excited-state evolution in bacteriorhodopsin.
Femtosecond time-resolved stimulated Raman spectroscopy (FSRS) is used to examine the photoisomerization dynamics in the excited state of bacteriorhodopsin. Near-IR stimulated emission is observed in the FSRS probe window that decays with a 400-600-fs time constant. Additionally, dispersive vibrational lines appear at the locations of the ground-state vibrational frequencies and decay with a 26...
متن کاملAnalysis of femtosecond stimulated Raman spectroscopy of excited-state evolution in bacteriorhodopsin.
The dispersive lines observed in time-resolved femtosecond stimulated Raman spectroscopy (FSRS), using a pair of 809 nm, 3 ps Raman pump, and 840-960 nm ultrashort probe pulse, for the first 500 fs photoisomerization dynamics in the excited state of bacteriorhodopsin, BR* (S(1)), created by a prior 500 nm, 35 fs actinic pump pulse, have previously been attributed to Raman initiated by nonlinear...
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ژورنال
عنوان ژورنال: Chemical Physics Letters
سال: 1988
ISSN: 0009-2614
DOI: 10.1016/0009-2614(88)87120-3