title: Single site electronic spectra of free base porphin in an n-octane crystal at 5 K.
abstract: The single site fluorescence and excitation spectra of free base porphin in an n-octane crystal at 5 K are reported. The vibrational frequencies of the ground and excited states (Qx, Qy, and B bands) have been determined from the spectra. The Qx region is very similar to the previously reported results from supersonic jet expansion. However, the Qy region is quite different in the jet and mixed crystal: the crystal spectrum exhibits extensive vibronic coupling. The Soret band shows little vibronic structure.
authors.affiliation: Department of Chemistry, York College, City University of New York, Jamaica 11451, USA.
authors.forename: W Y
authors.initials: WY
authors.lastname: Huang
authors.forename: E
authors.initials: E
authors.lastname: Van Riper
authors.forename: L W
authors.initials: LW
authors.lastname: Johnson
mesh_terms: D003460:Crystallization; D015394:Molecular Structure; D009795:Octanes / Q000737:chemistry*; D011166:Porphyrins / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D013696:Temperature
chemical_list: D009795:Octanes; D011166:Porphyrins; C107018:porphine; C026728:octane