Determination of femtosecond lifetimes of higher excited singlet states by means of transient photophysical hole-burning. The S2 state of phenanthrene

Zusammenfassung

Transient photophys. hole-burning was studied as a method of measuring femtosecond lifetimes of higher excited electronic states of polyat. mols. For the 0,0 transition to the S2 state of phenanthrene in isopentane/2-methylpentane glass at 4 K, a homogeneous linewidth of 67 +- 7 cm-1 was found corresponding to a lifetime of 79 +- 8 fs for this state.