Author/Authors :
Catherine and Portella-Oberli، نويسنده , , Marcia T and Jeannin، نويسنده , , Catherine and Soep، نويسنده , , Benoit and Zerza، نويسنده , , Gerald and Chergui، نويسنده , , Majed، نويسنده ,
Abstract :
The ultrafast production and decay of carbenes from the diphenyldiazomethane precursor in isooctane has been investigated by femtosecond transient absorption spectroscopy. Diphenylcarbene is produced in less than 300 fs in a singlet state. It then undergoes an ultrafast (∼300 fs) internal conversion followed by an intermediate step of a few picoseconds, which we attribute to a conformational change between its C1 and C2v geometries. Finally, intersystem crossing from S1 to the triplet ground state occurs in ∼100 ps.
