Excited states of bridged [14]annulenes

Fluorescence and Raman spectra of two representative bridged [14]annulenes, namely 1,6:8,13-ethanediylidene[14]-annulene and 1,6:8,13-propanediylidene[14]annulene are measured. The Raman spectra are measured using several excitation wavelengths in pre- and/or near-resonance conditions with respect to the L(sub a) and B(sub a) states.