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Resonance Raman effect in matrix isolated photolytically produced monomeric iodine: An investigation of the excitation profiles of the overtones
Author(s) -
Grzybowski Joseph M.,
Andrews Lester
Publication year - 1975
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250040111
Subject(s) - overtone , excitation , resonance (particle physics) , chemistry , analytical chemistry (journal) , raman spectroscopy , iodine , matrix (chemical analysis) , atomic physics , nuclear magnetic resonance , spectral line , optics , physics , astronomy , quantum mechanics , organic chemistry , chromatography
High intensity resonance Raman overtone progressions out to ν = 3, 14, 23, 24, 25, 17, and 3 have been observed with 457.9 nm, 476.5 nm, 488.0 nm, 514.5 nm, 530.9 nm, 568.2 nm, and 647.1 nm excitation respectively, for monomeric iodine isolated in an argon matrix. The normalised intensities have been determined and plotted as excitation profiles for the overtones. There is substantial evidence indicating a resonance coupling not only with the 3 ∏ Ou + electronic state of I 2 , but also with the 1 ∏ 1u state. The following spectroscopic constants for matrix‐isolated iodine have been calculated from the wavenumber data: ω e = (213.70±0.22) cm −1 , ω e X e = (0.60±0.01) cm −1 , and ω e Y e = (−0.019±0.002) cm −1 .