scholarly journals XUV-induced reactions in benzene on sub-10 fs timescale: nonadiabatic relaxation and proton migration

2017 ◽  
Vol 19 (30) ◽  
pp. 19822-19828 ◽  
Author(s):  
M. C. E. Galbraith ◽  
C. T. L. Smeenk ◽  
G. Reitsma ◽  
A. Marciniak ◽  
V. Despré ◽  
...  
Keyword(s):  
Fragmentation Channel ◽  
Transient Behaviour ◽  
Proton Migration

Short XUV pulses produce excited cationic states of benzene. Their dynamics are probed by few-cycle VIS/NIR pulses. Very fast τ ≈ 20 fs nonadiabatic processes dominate the relaxation. In the CH3+ fragmentation channel a non-trivial transient behaviour is observed.

Dielectric studies of proton migration and relaxation in wet cellulose and its derivatives

Polymer ◽  
1981 ◽  
Vol 22 (8) ◽  
pp. 1048-1053 ◽  
Author(s):  
Derek J. Crofton ◽  
Richard A. Pethrick
Keyword(s):  
Dielectric Studies ◽  
Proton Migration

Numerical Examination of Jets Induced by Multi-Bubble Interactions

2018 ◽  
Author(s):  
Joydip Mondal ◽  
Arpit Mishra ◽  
Rajaram Lakkaraju ◽  
Parthasarathi Ghosh
Keyword(s):  
Target Location ◽  
Effluent Treatment ◽  
Tannery Effluent ◽  
Particle Erosion ◽  
Coverage Area ◽  
Transient Behaviour ◽  
Bubble Interactions ◽  
Time Histories ◽  
The Many ◽  
Fictitious Particle

Jets produced by the interaction of collapsing cavitating bubbles containing high-pressure gases can be utilized for wide variety of applications e.g. particle erosion, medical purposes (lithotripsy, sonoporation), tannery effluent treatment, etc. Among the many parameters, this jetting is largely influenced by spatial orientation of bubbles, their times of inception, relative bubble size ratio. In this context, multiple cavitating bubbles are able to generate numerous simultaneous jets, under suitable conditions, hence operating over a wider coverage area. Such multi-bubble arrangements can go a long way in enhancing the erosive impact on a target location even at cryogenic temperature (< 123 K) and hence necessitate investigation. In this paper, different configurations of multiple-bubble interactions are numerically simulated to examine jets directed towards a target location (fictitious particle, cell etc.) using computational fluid dynamics. No phase change is considered and the effect of gravity is neglected. The transient behaviour of the interface between the two interacting fluids (bubble and ambient liquid) is modelled using VOF (volume of fluid) method. In this paper, results obtained for different bubble configurations through numerical simulation are validated against suitable literature and further explored to assess the resulting jet effects. The time histories of interacting bubbles are presented and the consequent flow-fields are evaluated by the pressure and velocity distributions obtained. The same calculation is repeated in cryogenic environment and the results are compared. An attempt is made to approach towards an optimum arrangement and conditions for particle erosion.

Ketone hydrogenation catalyzed by a new iron(ii)–PNN complex

2016 ◽  
Vol 6 (12) ◽  
pp. 4428-4437 ◽  
Author(s):  
B. Butschke ◽  
M. Feller ◽  
Y. Diskin-Posner ◽  
D. Milstein
Keyword(s):  
Hydride Complex ◽  
Mild Conditions ◽  
Ketone Hydrogenation ◽  
Proton Migration

A dearomatized Fe(ii)–hydride complex mediates the hydrogenation of enolizable ketones under very mild conditions. Deactivation occursviaintramolecular proton migration.

The transient behaviour of Pt-Rh(410) alloy surfaces upon interaction with O2, NO and CO

1989 ◽  
Vol 208 (3) ◽  
pp. A11
Author(s):  
F.C.M.J.M. van Delft ◽  
J. Siera ◽  
B.E. Nieuwenhuys
Keyword(s):  
Transient Behaviour
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