Portal de Periódicos da CAPES

Optimal Control of Photoisomerization

2005; American Physical Society; Volume: 94; Issue: 6 Linguagem: Inglês

10.1103/physrevlett.94.068305

1092-0145

G. Vogt, Gerhard Krampert, P. Niklaus, Patrick Nuernberger, G. Gerber,

Photoreceptor and optogenetics research

We report on optimal control of the photoisomerization of 3,3-diethyl-2,2-thiacyanine iodide dissolved in methanol. Enhancement and reduction of the relative yield of $cis$ to $trans$ isomers are achieved; i.e., the quantum efficiency of the photoisomerization is controlled with optimally phase and amplitude shaped 400 nm femtosecond laser pulses. Single-parameter control schemes, like chirp or intensity variation, fail to change the ratio of the photoproducts. The successful modification of the molecular structure can be regarded as a first step towards controlled stereoselectivity in photochemistry.