scholarly journals Calculation of the Nonradiative Transition Rate for the1B1u→1B2uTransition in Benzene

1973 ◽  
Vol 46 (5) ◽  
pp. 1297-1300 ◽  
Author(s):  
Noriyuki Shimakura ◽  
Yuichi Fujimura ◽  
Takeshi Nakajima
Keyword(s):  
Transition Rate ◽  
Nonradiative Transition

Ab initio quantum dynamical analysis of ultrafast nonradiative transitions via conical intersections in pyrazine

2015 ◽  
Vol 17 (3) ◽  
pp. 2012-2014 ◽  
Author(s):  
Manabu Kanno ◽  
Yuta Ito ◽  
Noriyuki Shimakura ◽  
Shiro Koseki ◽  
Hirohiko Kono ◽  
...  
Keyword(s):  
Ab Initio ◽  
Transition Rate ◽  
Dynamical Analysis ◽  
Nonradiative Transition ◽  
Conical Intersections ◽  
Quantum Dynamical ◽  
Nonradiative Transitions

Ab initio quantum dynamical calculations reveal the contributions of the optically dark S1 (1B3u), S3 (1Au), and S4 (1B2g) states to ultrafast nonradiative transition from the optically bright S2 (1B2u) state in pyrazine and suggest a much faster transition rate than previously believed.

scholarly journals Induced Nonradiative Transitions in Benzene

1970 ◽  
Vol 25 (6) ◽  
pp. 946-955
Author(s):  
J. W. Eastman
Keyword(s):  
Vibrational Relaxation ◽  
Transition Rate ◽  
Threshold Energy ◽  
Zero Point ◽  
Nonradiative Transition ◽  
Initial State ◽  
Rate Determining Step ◽  
Liquid Solutions ◽  
Nonradiative Transitions ◽  
Limiting Values

AbstractA nonradiative electronic transition in benzene occurs at about 2400 cm -1 above the zero-point vibration of the 1B2u electronic state. The rate-determining step may be the vibrational relaxation of the product or the nonradiative transition itself. The rate of the latter is limited to 108 < kAC < 1011 sec-1 in the vapor at 100 torr and kAC ~ 1012 sec-1 in liquids. There are also limiting values in liquids for the threshold energy and the rate of vibrational relaxation of the initial state.In liquid solutions, the observed transition rate increases with increasing intermolecular force, but it is not increased by alkyl substitutions. Symmetry perturbation and other sources of solventinduced transitions are discussed. Also, means are suggested by which it may be possible to catalyse the formation of benzvalene.

Reexamination of KNO3IV and transition rate of KNO3II ⇋ KNO3IV*

1962 ◽  
Vol 117 (5-6) ◽  
pp. 399-410 ◽  
Author(s):  
Briant L. Davis ◽  
Leason H. Adams
Keyword(s):  
Transition Rate

Temperature Effect on the Two-Dimensional Phase Transition Kinetics of Adenine Adsorbed at the Hg Electrode/Aqueous Solution Interface

2003 ◽  
Vol 68 (8) ◽  
pp. 1407-1419 ◽  
Author(s):  
Claudio Fontanesi ◽  
Roberto Andreoli ◽  
Luca Benedetti ◽  
Roberto Giovanardi ◽  
Paolo Ferrarini
Keyword(s):  
Phase Transition ◽  
Aqueous Solution ◽  
Phase Change ◽  
Temperature Effect ◽  
Transition Rate ◽  
Effect Of Temperature ◽  
Two Dimensional ◽  
Solution Interface ◽  
Phase Transition Kinetics ◽  
Kinetics Of

The kinetics of the liquid-like → solid-like 2D phase transition of adenine adsorbed at the Hg/aqueous solution interface is studied. Attention is focused on the effect of temperature on the rate of phase change; an increase in temperature is found to cause a decrease of transition rate.

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