The 341 nm band system of pyridine-N-oxide. Analysis of the in-plane vibrational structure
作者： H.D. Bist , J.S. Parihar , J.C.D. Brand
DOI: 10.1016/0022-2852(76)90024-2
关键词: Absorption (chemistry) 、 Infrared 、 Pyridine-N-oxide 、 Ring (chemistry) 、 Chlorobenzene 、 Raman spectroscopy 、 Materials science 、 Molecule 、 Excited state 、 Atomic physics 、 Physical and Theoretical Chemistry 、 Spectroscopy 、 Atomic and Molecular Physics, and Optics
摘要: Abstract The near-ultraviolet absorption of pyridine-N-oxide has been photographed at high resolution in the range 295–365 nm, and a weak, long-axis polarized subsystem A-type bands identified spectrum for first time. presence both A- B-type system establishes conclusively that transition is π ∗ ← [ 1 B 2 A ] . complete set a1 b2 fundamental frequencies ground excited states transition, using infrared Raman measurements to supplement data from electronic analysis. Physical structure state not determined but appears qualitatively involve generalized increase dimensions ring, coupled with decrease NO distance. band very similar isovalent aromatic molecules, including phenol chlorobenzene.
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