Abstract:The resonance Raman spectra of the lowest lying singlet (S 1 ) state of free-base tetraphenylporphyrin and seven of its isotopomers were recorded under pump-and-probe conditions with a time delay of −2 ns between pump and probe laser pulses. In the S 1 spectra of the isotopomers, as in the ground state, there are dramatic splittings of what appear to be single bands in the natural isotopic abundance spectrum. The most structurally significant bands of the S 1 state were assigned on the basis of the isotope dat… Show more
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