Optimal control of photoisomerization.
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.
Vogt
G
G
Physikalisches Institut, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
Krampert
G
G
Niklaus
P
P
Nuernberger
P
P
Gerber
G
G
D002232:Carbocyanines / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry; D007536:Isomerism; D010777:Photochemistry / Q000379:methods*; D013816:Thermodynamics
D002232:Carbocyanines; D004396:Coloring Agents