Femtosecond investigations on the ultrafast photo-dissociation dynamics of CpMn(CO)3 and its fragment ions

Abstract

This work is devoted to investigation on the ultrafast dissociation phenomena of the cyclopentadienyl manganese tricarbonyl–CpMn(CO)₃⁻ molecule and its emerging fragments by means of mass spectrometry and pump–probe spectroscopy. Studies on the laser intensity and wavelength dependence observed in the recorded mass spectra are reported. Time-resolved mass spectra were measured in order to investigate the fragmentation time scale. From the recorded two-color pump and probe spectra the lifetimes of the electronically excited states for all CpMn(CO)_n⁺ (1 ≤ n ≤ 3) ions were extracted. By employing laser pulses of ca. 40 fs, wave packet dynamics of the parent ion CpMn(CO)₃⁺ as well as for the first fragment have been resolved. These findings have already been successfully exploited in optimal control experiments. The present studies are extended to different pump pulse intensities.