Ultrafast laser excitation and rotational de-excitation of cis-stilbene

作者：Dou Yusheng^*; Wu Weifeng; Tang Hong; Allen Roland E

来源：Chemical Physics, 2008, 353(1-3): 104-108.

DOI：10.1016/j.chemphys.2008.07.018

• cis-Stilbene
• Photoisomerization
• Rotational dynamics
• Solvent effect

A realistic dynamical simulation is reported for ultrafast laser excitation and rotational de-excitation of cis-stilbene. Upon irradiation by a laser pulse with a FWHM of 100 fs, the molecule first rotates around its vinyl bond to about 90 degrees, where an avoided crossing leads to electronic de-excitation. The molecule then immediately twists back to about -60 degrees within only about 80 fs, avoiding isomerization. The other principal dihedral angles, within the phenyl rings, tag behind in time, so there is significant large strain between the phenyl rings and vinyl bond.

• 出版日期2008-11-3
• 单位重庆邮电大学