Quantum-mechanical modeling of the femtosecond isomerization in rhodopsin

Article Abstract:

A technique for the photoisomerization of retinal rhodopsin using a vibronically coupled electronic two-state system is described.

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Isomerization and reactivity of allyl groups adsorbed on coinage metals

Article Abstract:

Adsorbed C(sub 3)H(sub 5) fragments and halogen atoms are generated by the use allyl halides (C(sub 3)H(sub 5)X, X=Cl, Br). Using vibrational and thermal desorption spectroscopies, isomerization and reactivity of sigma-bonded (mew(super 1)) and pie-bonded(mew(super 3)) C(sub 3)H(sub 5) on Cu(100) and Ag(111) are studied.

Thermal properties, Halides, Atomic properties

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Femtosecond dynamics of rhodopsin photochemistry probed by a double pump spectroscopic approach

Article Abstract:

Fematosecond pump-probe measurements of the excitation pathway of bovine rhodopsin to bathorhodopsin show varying transient events in the photoinduced absorption spectrum. The results suggest that the trajectory of excited rhodopsin splits into two pathways very early that is one which results in bathorhodopsin formation on the ~200 fs time scale, and another which lives in the excited state for ca. 3 ps before undergoing internal conversion to rhodopsin.

Usage, Excited state chemistry, Absorption spectra, Chemical properties

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