Photochemical hole-burning in excited vibrational states of the S₁←S₀ transitīon of frēe-base porphin in an n-octane crystal

Photochemical hole-burning was used to study vibronic relaxation in the S1←S0 transition of H2P in n-octane at 4.2 K. Vibronic lines up to 1600 cm-1 above the origin were measured. The holewidths differ strongly and do not appear to be correlated with the excess in energy above the 0-0 transition. © 1979.