Femtosecond transient absorption, Raman, and electrochemistry studies of tetrasulfonated copper phthalocyanine in water solutions

The femtosecond pump-probe transient absorption spectroscopy is used to measure the ultrafast time-resolved electronic spectra of primary events induced in copper tetrasulfonated phthalocyanine Cu[(tsPc).sup.4-]) in aqueous solution. Combining of spectroscopy and electrochemical measurements gives clear interpretation of primary events upon light excitation, photochemical mechanisms and spectral features relating to photophysical and photochemical mechanisms.