The role of the molecular environment for the primary photoprocesses of phenol in solution

1980 ◽  
Vol 58 (19) ◽  
pp. 2006-2010 ◽  
Author(s):  
J. Zechner ◽  
G. Köhler ◽  
G. Grabner ◽  
N. Getoff
Keyword(s):  
Excitation Energy ◽  
Quantum Yields ◽  
Strongly Correlated ◽  
Solvated Electron ◽  
Excited Singlet ◽  
Solvent Interactions ◽  
Singlet States ◽  
Excited Singlet States

Quantum yields of fluorescence as well as of solvated electron and H atom formation have been measured for phenol in several pure solvents and mixtures of varying polarity. The influence of excitation energy has been studied by excitation of phenol in the first and second excited singlet states. The solvent dependences of fluorescence and photoejection parameters are strongly correlated. The results are interpreted in terms of specific solute–solvent interactions, in particular H-bonded structures.

Relaxation of the second excited singlet states of aromatic thiones: the role of specific solute-solvent interactions

1985 ◽  
Vol 107 (10) ◽  
pp. 2831-2837 ◽  
Author(s):  
A. Maciejewski ◽  
D. R. Demmer ◽  
D. R. James ◽  
A. Safarzadeh-Amiri ◽  
R. E. Verrall ◽  
...  
Keyword(s):  
Excited Singlet ◽  
Solvent Interactions ◽  
Singlet States ◽  
Excited Singlet States

ChemInform Abstract: RELAXATION OF THE SECOND EXCITED SINGLET STATES OF AROMATIC THIONES: THE ROLE OF SPECIFIC SOLUTE-SOLVENT INTERACTIONS

1985 ◽  
Vol 16 (42) ◽  
Author(s):  
A. MACIEJEWSKI ◽  
D. R. DEMMER ◽  
D. R. JAMES ◽  
A. SAFARZADEH-AMIRI ◽  
R. E. VERRALL ◽  
...  
Keyword(s):  
Excited Singlet ◽  
Solvent Interactions ◽  
Singlet States ◽  
Excited Singlet States

The third-order polarizability γ of C60: The role of low-lying two-electron excited singlet states Ag and Hg

2000 ◽  
Vol 112 (15) ◽  
pp. 6603-6607 ◽  
Author(s):  
Yasushi Nomura ◽  
Takashi Miyamoto ◽  
Toshiki Hara ◽  
Susumu Narita ◽  
Tai-ichi Shibuya
Keyword(s):  
Excited Singlet ◽  
Third Order ◽  
The Third ◽  
Singlet States ◽  
Excited Singlet States

Photochemical Reactions of Primary Aromatic Amines with Chloromethanes in Solution. I. Spectrochemical Studies

1989 ◽  
Vol 44 (12) ◽  
pp. 1585-1588 ◽  
Author(s):  
Wojciech Boszczyk ◽  
Tadeusz Latowski
Keyword(s):  
Hydrogen Chloride ◽  
Stability Constants ◽  
Aromatic Amines ◽  
Photochemical Reactions ◽  
Quantum Yields ◽  
Excited Singlet ◽  
Singlet States ◽  
Primary Aromatic Amines ◽  
Excited Singlet States ◽  
Induced Reaction

Interactions were studied of aniline, 4-methoxyaniline and 4-ethoxyaniline with tetrachloromethane, chloroform and dichloromethane in their ground and first excited singlet states. Stability constants of the complexes of these amines with the chloromethanes in cyclohexane were determined as well as their quantum yields of fluorescence in this solvent. The quenching of fluorescence of aniline and its derivatives by the chloromethanes was ascertained and characterized. Quantum yields of the formation of hydrogen chloride, ψΗCl, were measured during photochemically induced reaction of the amines in tetrachloromethane, chloroform and dichloromethane.

THE LUMINESCENCE OF COMPLEX MOLECULES IN RELATION TO THE INTERNAL CONVERSION OF EXCITATION ENERGY: PART II. N-HETEROAROMATICS

1960 ◽  
Vol 38 (2) ◽  
pp. 233-239 ◽  
Author(s):  
Robin M. Hochstrasser
Keyword(s):  
Excitation Energy ◽  
Internal Conversion ◽  
Absolute Ethanol ◽  
Exciting Light ◽  
Excited Singlet ◽  
Complex Molecules ◽  
Heavy Atoms ◽  
Singlet States ◽  
Energy Part ◽  
Excited Singlet States

The relative fluorescence and/or phosphorescence yields of a number of methyl- and halogeno-quinolines, isoquinolines, and acridines have been measured as a function of the wavelength of the exciting light. In all cases the solvent was absolute ethanol. The results show that the efficiency of internal conversion processes between excited singlet states is extremely high in comparison to other intramolecular steps. The effect of substituted heavy atoms is discussed, as well as the fluorescence of the conjugate acids of the bases.

scholarly journals The lifetimes and energies of the first excited singlet states of diadinoxanthin and diatoxanthin: the role of these molecules in excess energy dissipation in algae

1996 ◽  
Vol 1277 (3) ◽  
pp. 243-252 ◽  
Author(s):  
Harry A. Frank ◽  
Agnes Cua ◽  
Veeradej Chynwat ◽  
Andrew Young ◽  
David Gosztola ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Excess Energy ◽  
Excited Singlet ◽  
Singlet States ◽  
Excited Singlet States
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