High resolution electronic spectroscopy of para-alkyl substituted phenols and tetramethyl cyclobutane-1,3-dione

Technical Report · Fri Jul 01 00:00:00 EDT 1988

OSTI ID:6505503

Song, Kyuseok

High resolution electronic spectroscopy is demonstrated in the study of the electronic structure of para-alkyl substituted phenols (p-cresol, p-ethylphenol, p-isopropylphenol, p-propylphenol, p-sec-butylphenol, p-tert-butylphenol, and p-pentylphenol) and 2,2,4,4-tetramethyl cyclobutane-1,3-dione (TMCBD). The study on p-alkyl substituted phenols performed by laser induced fluorescence in a supersonic jet provided rich information of the electronic and vibrational structures of p-alkyl substituted phenols in the excited state as well as in the ground state. This study also provided a convenient method for the identification of conformational isomers of molecules in the excited state by observing fluorescence excitation spectra of the molecules to be studied. The study of TMCBD performed by fluorescence and low temperature polarized absorption spectroscopies provided an alternative technique for the study of electronic structures of molecules which cannot be studied in the gas phase under high resolution conditions due to the low fluorescence quantum yields or low vapor pressures of the molecules to be studied. Additionally, a complete vibrational analysis in the excited state (S/sub 1/) as well as in the ground state was performed. 43 refs., 16 figs., 5 tabs.

• Research Organization: Ames Lab., IA (USA)
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 6505503
• Report Number(s): IS-T-1376; ON: DE89007629
• Resource Relation: Other Information: Thesis (Ph.D.). Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CRESOLS
ELECTRONIC STRUCTURE
CYCLOALKANES
PHENOLS
BUTANE
ELECTRON SPECTROSCOPY
EXCITED STATES
FLUORESCENCE
GROUND STATES
ISOMERS
JETS
SPECTRA
SPECTROSCOPY
VIBRATIONAL STATES
ALKANES
AROMATICS
ENERGY LEVELS
HYDROCARBONS
HYDROXY COMPOUNDS
LUMINESCENCE
ORGANIC COMPOUNDS
400102* - Chemical & Spectral Procedures
400201 - Chemical & Physicochemical Properties