State Selected Charge Transfer and Chemical Reactions by the Tesico Technique

Communication: Rovibrationally selected absolute total cross sections for the reaction H2O+(X2B1; v1+v2+v3+ = 000; N+Ka+Kc+) + D2: Observation of the rotational enhancement effect

“…[1][2][3][4][5][6][7][8] Among the many previous state-selected ion-molecule reaction studies, the overwhelming majority has been devoted to a) Electronic mail: cyng@ucdavis.edu. the investigation of kinetic, 9 vibrational, and electronic energy effects of reactant ions.…”

“…Many previous state-selected experiments have shown that for endothermic reactions, internal vibrational excitation is more effective than kinetic energy in driving specific chemical processes. [1][2][3][4][5][6][7][8] However, the rotational effects on chemical reactivity have not been examined with equal vigor compared to the study of vibrational effects, partly due to the difficulty in preparing reactant molecules in single rotation states because of the small energy spacing between rotational levels. The rotational effect may not be observable in reaction cross section measurements if the center-of-mass kinetic energy (E cm ) spread is significantly larger than the rotational excitation of reactant molecules.…”

“…the investigation of kinetic, 9 vibrational, and electronic energy effects of reactant ions. [2][3][4][5][6][7][8] Up to the present, five stateselected ion-molecule reaction studies 1,[10][11][12][13][14][15][16] have been reported aiming to examine the reactivity of ions in different rotational levels. All of these studies were concerned with the rotational selection of diatomic reactant ions, H 2 + , NO + , CO + , HBr + , and N 2 + , prepared by the autoionization, resonance-enhanced multi-photon ionization, or pulsed field ionization-photoion 17 (PFI-PI) methods.…”

3 Optical studies of ion–molecule reactions

“…However, the coupling of synchrotron radiation to coincidence techniques has been used successfully to study the effects of reagent ion internal state on reactivity and reaction dynamics. Such studies have been reviewed both recently 51 and previously 52,53 and will not be a major focus of the current review. However, the very recent incorporation of pulsed field ionisation techniques into a photoelectron secondary ion coincidence apparatus (PFI-PESICO) 54 is highlighted and has resulted in rotational state-selected studies of the H 2 1 (X, v 1 ~0-17, N 1 ~1) reactions with Ar 55 and Ne.…”

Quantum-State-Selected Integral Cross Sections and Branching Ratios for the Ion–Molecule Reaction of N2+(X2Σg+: ν+= 0–2) + C2H4in the Collision Energy Range of 0.05–10.00 eV

“…The development of quantum-state-selected ion–molecule reaction studies in the past decades has rendered a major platform for the investigation of the E cm and the quantum-rovibronic-state effects on chemical reactivity − of ions. The most challenging task for these experiments is to prepare reactant ions into single quantum-rovibronic states and still maintain a sufficiently high intensity for the state-selected ions to undergo single-collision measurements .…”