Title of article :
Long-lived perpendicular conformation in the photoisomerization path of 1,1′-dimethylstilbene and 1,1′-diethylstilbene
Author/Authors :
Berndt، نويسنده , , F. and Dobryakov، نويسنده , , A.L. and Quick، نويسنده , , M. and Mahrwald، نويسنده , , R. and Ernsting، نويسنده , , N.P. and Lenoir، نويسنده , , D. A. KOVALENKO، نويسنده , , S.A.، نويسنده ,
Abstract :
Olefinic bismethylation (bisethylation) lowers the barrier to isomerization in photoexcited stilbene, resulting in ultrafast (0.3 ps) twist to the perpendicular conformation which is the common intermediate for the trans–cis and cis–trans reaction. The perpendicular state is long-lived, 19 ps in hexane and 2.9 ps in acetonitrile.
