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Ultrafast Optical Spectroscopy of Retinal Chromophore

The branching ratio of the excited-state population at the conical intersection between the S1 and S0 energy surfaces (ΦCI) was studied by multipulse ultrafast transient absorption spectroscopy. Pump–dump–probe experiments allowed to measure the photoisomerization time constant with unprecedented precision. Starting from these results, we demonstrate that the polarity of the solvent is the key factor influencing the ΦCI and the photoisomerization yield.

Article Published on J. Am. Chem. Soc., 2012, 134 (2), pp 955–961 ( Link: http://pubs.acs.org/doi/abs/10.1021/ja205763x )
Last Updated on Sunday, 04 March 2012 11:46