Excited Singlet State Radiative and Nonradiative Transition Probabilities for Acetone, Acetone‐d6, and Hexafluoroacetone in the Gas Phase, in Solution, and in the Neat Liquid

1971 ◽  
Vol 54 (3) ◽  
pp. 1271-1276 ◽  
Author(s):  
Arthur M. Halpern ◽  
William R. Ware
Keyword(s):  
Gas Phase ◽  
Singlet State ◽  
Transition Probabilities ◽  
Excited Singlet State ◽  
Nonradiative Transition ◽  
Excited Singlet

The Excited Singlet State of Chloropentafluoroacetone; Quenching by Unsaturated Hydrocarbons

1971 ◽  
Vol 49 (12) ◽  
pp. 2053-2058 ◽  
Author(s):  
H. S. Samant ◽  
A. J. Yarwood
Keyword(s):  
Gas Phase ◽  
Singlet State ◽  
Excited Singlet State ◽  
Energy Relation ◽  
Excited Singlet ◽  
Quenching Rate ◽  
Unsaturated Hydrocarbons ◽  
Linear Free Energy ◽  
Free Energy Relation ◽  
A Charge

The fluorescence of chloropentafluoroacetone in the gas phase at 23 °C is quenched by the addition of certain olefins. The quenching rate constants of 17 unsaturated hydrocarbons for the first excited singlet state of chloropentafluoroacetone are reported. The molecules are divided into two classes on the basis of their quenching abilities, (a) olefins with only electron-withdrawing substituents and (b) olefins with electron-donating substituents. It is shown that the quenching by molecules in the latter group can be quantitatively correlated with the ionization potential (i.p.) of the quenching molecule. The relation is log k = 18.0 − 0.79 (i.p.), i.e. a type of linear free energy relation is obeyed. This implies that the quenching by molecules containing only electron-donating substituents involves a charge-transfer complex.

Quenching of Fluorescence of Chloropentafluoroacetone by Saturated Hydrocarbons

1972 ◽  
Vol 50 (9) ◽  
pp. 1429-1432 ◽  
Author(s):  
A. J. Yarwood
Keyword(s):  
Gas Phase ◽  
Rate Constants ◽  
Singlet State ◽  
Fluorescence Yield ◽  
Excited Singlet State ◽  
Excited Singlet ◽  
Quenching Rate ◽  
Saturated Hydrocarbons ◽  
Phase Measurements ◽  
Electronically Excited

Saturated hydrocarbons can quench the electronically excited singlet state of a simple ketone in the gas phase. Measurements on the quenching of the fluorescence yield of chloropentafluoroacetone at 23 °C show that different saturated hydrocarbons can deactivate the excited singlet state with varying efficiencies. The quenching rate constants are reported and possible relationships considered.

Ab Initio MR-CISD Study of Gas-Phase Basicity of Formamide in the First Excited Singlet State

2004 ◽  
Vol 108 (46) ◽  
pp. 10317-10325 ◽  
Author(s):  
Ivana Antol ◽  
Mirjana Eckert-Maksic ◽  
Hans Lischka
Keyword(s):  
Ab Initio ◽  
Gas Phase ◽  
Singlet State ◽  
Excited Singlet State ◽  
Excited Singlet

The Gold Porphyrin First Excited Singlet State¶

2002 ◽  
Vol 76 (1) ◽  
pp. 47 ◽  
Author(s):  
Joakim Andréasson ◽  
Gerdenis Kodis ◽  
Su Lin ◽  
Ana L. Moore ◽  
Thomas A. Moore ◽  
...  
Keyword(s):  
Singlet State ◽  
Excited Singlet State ◽  
Excited Singlet

The Forbidden 11Bu– Excited Singlet State in Peridinin and Peridinin Analogues

2017 ◽  
Vol 122 (1) ◽  
pp. 130-139
Author(s):  
Jordan A. Greco ◽  
Nicole L. Wagner ◽  
Harry A. Frank ◽  
Robert R. Birge
Keyword(s):  
Singlet State ◽  
Excited Singlet State ◽  
Excited Singlet

ChemInform Abstract: Lowest Energy Excited Singlet State of Isolated cis-Hexatriene

ChemInform ◽  
2010 ◽  
Vol 22 (34) ◽  
pp. no-no
Author(s):  
W. J. BUMA ◽  
B. E. KOHLER ◽  
K. SONG
Keyword(s):  
Singlet State ◽  
Excited Singlet State ◽  
Excited Singlet
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