Electronic relaxation of xenon chloride (Xe2+Cl-) in solid and liquid xenon

Abstract

lation suggesting that the stable conformation of the radical is planar,9 and thus it might be possible to assert that the circumstances of the canal complex make the nonplanar structure stable. If the above assertion is true, it follows that the most stable conformation (S) is pyramidal and the next stable one (U) is planar as in the MINDO calculation. These two structures cannot exist at the same time unless unreasonable structures are assumed.However, if a pyramidal conformation is the most stable at the equilibrium state, it is reasonable to suppose that the next stable (9) Igual, J. THEOCHEM 1985, 121, 221. one is its inverse conformation. This is the present case.In conclusion, the structure of the methylcyclohexyl radical is pyramidal at the equilibrium state and the angle of CCC is about 117°. At the low temperature, there are two nonplanar conformations and the radical does the umbrella inversion between these conformations. The existence of the wall of thiourea makes it possible to observe this inversion. At the higher temperatures, this umbrella inversion occurs rapidly and the radical can be thought to be planar.

Condensed Phase Laser InducedHarpoon Reactions

“…The latter consideration makes these systems ideal for the study of solvation dynamics, in particular since these exciplexes are long lived in the liquid phase--in dilute solutions the relaxation is dominated by radiation; in concentrated solutions the relaxation is due to diffusion controlled encounters of the exciplex with the parent molecular halogen. 15 It is important to point out that with the exception of XeEF, all of these emissions are stable with respect to duration of excitation. In contrast with the low temperature matrices, in the liquids the halogen atoms are free to recombine between exaltation pulses.…”

Rydberg and charge transfer states of F atoms in neon matrices

“…15 and 16͒ and Cl 2 ͑Refs. 17-19͒, together with experimental studies of these systems [19][20][21][22][23][24][25][26][27] have demonstrated both caging and mobility of photoproducts. The dynamics of halogens in rare gas solids at high kinetic energies are sensitive to the nonadiabatic processes involving curve crossings between valence, Rydberg, and charge transfer states, and the interaction of the matrix host with these states.…”

Synergistic Effects in Two‐Photon Absorption: the Quantum Electrodynamics of Bimolecular Mean‐Frequency Absorption

“…This discovery clearly delineates the underlying mechanism for the process as one in which the synergistic excitation of the two absorbing species results from molecular proximity rather than any collisional effect. The reaction mechanism (1.1) has been further corroborated by Apkarian and co-workers, who have also extended the study to charge transfer reactions in solid and liquid xenon (Fajardo and Apkarian 1986Wiedeman et al 1987Wiedeman et al , 1988. It has additionally been shown to be the predominant reaction route in the case of Xe:Cl, van der Waals complexes generated in seeded molecular beams (Boivineau et al 1986a, b).…”