Collision energy dependence and product recoil velocity analysis of O+(4S)+C2H2 charge-transfer and chemical reaction channels

1998 ◽  
Vol 109 (13) ◽  
pp. 5300-5307 ◽  
Author(s):  
Yu-hui Chiu ◽  
Rainer A. Dressler ◽  
Dale J. Levandier ◽  
Skip Williams ◽  
Edmond Murad
Keyword(s):  
Charge Transfer ◽  
Energy Dependence ◽  
Chemical Reaction ◽  
Collision Energy ◽  
Velocity Analysis ◽  
Recoil Velocity ◽  
Reaction Channels

Guided-ion beam study of the O2++C2H2 charge-transfer and chemical reaction channels

1999 ◽  
Vol 110 (9) ◽  
pp. 4291-4299 ◽  
Author(s):  
Yu-hui Chiu ◽  
Rainer A. Dressler ◽  
Dale J. Levandier ◽  
Skip Williams ◽  
Edmond Murad
Keyword(s):  
Charge Transfer ◽  
Chemical Reaction ◽  
Ion Beam ◽  
Guided Ion Beam ◽  
Reaction Channels

Fragmentation of alkoxide ions following collisional activation. An energy-resolved study

1988 ◽  
Vol 66 (11) ◽  
pp. 2947-2953 ◽  
Author(s):  
Roger S. Mercer ◽  
Alex G. Harrison
Keyword(s):  
Kinetic Energy ◽  
Collisional Activation ◽  
Collision Energy ◽  
Relative Importance ◽  
Elimination Reaction ◽  
Proton Abstraction ◽  
Relative Stabilities ◽  
Collisionally Activated Dissociation ◽  
Reaction Channels ◽  
Alkane Elimination

The collisionally activated dissociation reactions of the C2 to C5 alkoxide ions have been studied for collisons occurring at 8 keV kinetic energy and also over the range 5 to 100 eV kinetic energy. The alkoxide ions fragment by 1,2-elimination of H2 and/or an alkane. Thus, primary alkoxide ions fragment by elimination of H2 only, secondary alkoxide ions show elimination of H2 and alkane molecules, while tertiary alkoxide ions show elimination of alkanes only. In alkane elimination, loss of CH4 is much more facilie than loss of larger alkanes. For secondary alkoxide ions, where more than one elimination reaction occurs, the energy dependence of fragmentation has been explored over the collision energy range 5 to 100 eV. The results are interpreted in terms of a step-wise mechanism involving formation of an anion-carbonyl compound ion-dipole complex, followed by proton abstraction by the H− or alkyl anion leading to the final products. The relative importance of the reaction channels is determined by the relative stabilities of these ion-dipole complexes.

scholarly journals Graphene catalyzes the reversible formation of a C–C bond between two molecules

2018 ◽  
Vol 4 (12) ◽  
pp. eaau9366 ◽  
Author(s):  
J. J. Navarro ◽  
M. Pisarra ◽  
B. Nieto-Ortega ◽  
J. Villalva ◽  
C. G. Ayani ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Transition Metal ◽  
Chemical Reaction ◽  
Transition Metal Catalysts ◽  
Magnetic Switch ◽  
Kondo Resonance ◽  
Efficient Charge ◽  
Catalytic Role ◽  
Reversible Formation

Carbon deposits are well-known inhibitors of transition metal catalysts. In contrast to this undesirable behavior, here we show that epitaxial graphene grown on Ru(0001) promotes the reversible formation of a C–C bond between −CH2CN and 7,7,8,8-tetracyano-p-quinodimethane (TCNQ). The catalytic role of graphene is multifaceted: First, it allows for an efficient charge transfer between the surface and the reactants, thus favoring changes in carbon hybridization; second, it holds the reactants in place and makes them reactive. The reaction is fully reversible by injecting electrons with an STM tip on the empty molecular orbitals of the product. The making and breaking of the C–C bond is accompanied by the switching off and on of a Kondo resonance, so that the system can be viewed as a reversible magnetic switch controlled by a chemical reaction.

Collision-Energy Dependence of the Ion–Molecule Charge Exchange Reaction Ar+ + NO

2018 ◽  
Vol 122 (47) ◽  
pp. 9171-9176 ◽  
Author(s):  
Jie Hu ◽  
Chun-Xiao Wu ◽  
Yunsheng Ma ◽  
Shan Xi Tian
Keyword(s):  
Exchange Reaction ◽  
Energy Dependence ◽  
Charge Exchange ◽  
Collision Energy ◽  
Charge Exchange Reaction
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