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Molecular Rydberg States and Ionization Energy Studied by Two‐Photon Resonant Ionization Spectroscopy
Author(s) -
Chen YitTsong
Publication year - 2002
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200200104
Subject(s) - chemistry , rydberg formula , excited state , photoionization , polyatomic ion , ionization , atomic physics , ionization energy , valence (chemistry) , resonance enhanced multiphoton ionization , spectroscopy , rydberg state , photoexcitation , ab initio , photoemission spectroscopy , ion , spectral line , physics , organic chemistry , quantum mechanics , astronomy
Abstract In this article, I will review the excited valence/Rydberg states and ionization energies of vinyl chloride, propyne, and allyl radical that we have examined recently in our laboratory by 2+1 resonance enhanced multiphoton ionization (REMPI) spectroscopy. In these studies, we have emphasized spectroscopic investigations from the first excited electronic states to the first ionization energies of the molecules and radicals of interest. In spectroscopic analysis, successful electronic identifications have been facilitated with theoretical ( ab initio and density functional) calculations. In particular, we have applied calculated Franck‐Condon factors to assist vibrational assignment for experimental vibronic spectra. The spectroscopic studies of these polyatomic excited valence/Rydberg states help us to illuminate the photodissociation pathways and to manifest the complicated chemical‐reaction mechanisms due to the multi‐dimensionality in polyatomic molecular potential energy surfaces.