Femtochemistry

The topic of femtochemistry is surveyed from both theoretical and experimen tal points of view. A time-dependent wave packet description of the photodi ssociation of the O-C-S molecule reveals vibrational motion in the transiti on-state region and suggests targets for direct experimental observation. T heoretical approaches for treating femtosecond chemical phenomena in conden sed phases are featured along with prospects for laser-controlled chemical reactions by using tailored ultrashort chirped pulses. An experimental stud y of the photoisomerization of retinal in the protein bacteriorhodopsin is discussed with an aim to gain insight into the potential energy surfaces on which this remarkably efficient and selective reactions proceeds. Finally, a prospective view of new frontiers in femtochemistry is given.