"Photolysis of triiodide studied by femtosecond pump-probe spectroscopy with emission detection"P. Gilch, I. Hartl, Q. An, W. Zinth
J. Phys. Chem. A, 106 (2002) 1647-1653
The photodissociation of triiodide into diiodide and iodine in ethanol
solution was studied by a novel femtosecond pump-probe technique.
The dispersed emission of the triiodide sample was recorded as a
function of the delay between a 407 nm pump pulse and a 815 nm
probe pulse. The most prominent feature of the resulting time
dependent spectra is a strong anti-Stokes (with respect to the probe
wavelength) contribution. This contribution rises with a delay of
~500 fs and decays on the 2 ps time scale. The decay of the
anti-Stokes spectrum is discussed in terms of the cooling dynamics
of nascent diiodide for which the technique presented here gives a
more direct access than transient absorption spectroscopy.
BMO authors (in alphabetic order):
The flow of vibrational energy in molecules