We report on the electronic emission spectra of free-base phthalocyanine doped into superfluid He4 droplets. The emission spectra of phthalocyanine obtained upon vibronic excitation show a doubling of all lines, absent in the gas phase [Fitch, Wharton, and Levy, J. Chem. Phys. 70, 2018 (1979)]. Similar features found for Mg-phthalocyanine in He4 droplets suggest that this doubling is due to the helium environment. Quantized relaxation states of the first helium layer surrounding the embedded molecule are discussed as likely causes of the doubling.
No takes yet. Share an insight, caveat, or question.
Lehnig et al. (2003) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: