Author/Authors :
Thomas and Malkmus، نويسنده , , S. and Koller، نويسنده , , F.O. and Heinz، نويسنده , , B. and Schreier، نويسنده , , W.J. and Schrader، نويسنده , , T.E. and Zinth، نويسنده , , W. and Schulz، نويسنده , , C. and Dietrich، نويسنده , , S. and Rück-Braun، نويسنده , , K. and Braun، نويسنده , , M.، نويسنده ,
Abstract :
The photo-induced ring-opening reaction C → E of a photochromic indolyl-fulgimide is investigated by sub-picosecond pump–probe spectroscopy in the visible and infrared spectral range. The thermally stable C-isomer shows a pronounced absorption in the visible spectral range without spectral overlap with the absorption of the E- and Z-isomer. The comparison of infrared and visible transient absorption data allows to assign the observed exponential 2.1 ps dynamics to the ring-opening reaction and the non-exponential 10–40 ps component to the cooling of the hot molecules. The transient absorption spectra taken 80 ps after photo-excitation are identical with the steady state difference spectra.
