Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Ian D. Hands"'
Publikováno v:
Journal of Molecular Structure. 838:78-83
A Jahn–Teller (JT) coupling model is developed for the p 2 ⊗ h JT system as a possible model for the doubly charged C 60 2 - dianion. The model described specifically includes second-order electron–vibration interactions which generate minima i
Publikováno v:
Journal of Molecular Structure. 838:60-65
Jahn-Teller (JT) problems are often characterised by an adiabatic potential energy surface (APES) containing either a set of isoenergetic wells or a trough of equivalent-energy points, which may be warped by higher-order coupling terms or anisotropic
Publikováno v:
Journal of Molecular Structure. 838:66-73
A general consideration is made of the vibronic coupling in a ( h u + ) 2 ⊗ h g Jahn–Teller system, that is to say, a system in which two holes of H u symmetry are coupled to vibrations of h g symmetry. We find that the resulting high-spin states
Publikováno v:
Fullerenes, Nanotubes and Carbon Nanostructures. 14:551-555
A theory is outlined that allows the rate of pseudorotation to be related to the molecular vibronic coupling constants in systems subject to the Jahn‐Teller effect. Results are illustrated for C60 − for two distinct cases corresponding to distort
Publikováno v:
ResearcherID
A Huckel model is developed for the bonds in buckminsterfullerene that simultaneously allows for bond alternation and the sphericity of the molecule. The theory is made self-consistent by comparison with the bond lengths determined by experiment and
Publikováno v:
Optics Communications. 174:285-290
The generation in solution of optically induced second harmonics, through six-wave mixing, has been observed using three distinct optical geometries. The established phase-conjugate geometry is not useful for ultrafast time-resolved experiments. A gr
Autor:
Michael P. Higlett, Ian D. Hands, Michael J. Hope, Colin A. Bates, Janette L. Dunn, David L. Andrews, Stephen R. Meech
Publikováno v:
Chemical Physics Letters. 474:112-114
The ultrafast decay rates of photoexcited C 60 - and C 60 2 - ions have been measured in the condensed phase. The mechanism for decay is internal conversion, and the decay rate is a strong function of the charge on the ion. A bottleneck in the ground
Publikováno v:
The Journal of Physical Chemistry A. 103:3830-3836
The optically induced generation of second harmonics in isotropic media, which arises through a six-wave mixing interaction, is employed in ultrafast studies of orientational relaxation in solution (4-diethylamino-4‘-nitrostilbene in a range of sol
Publikováno v:
The Journal of Chemical Physics. 109:10580-10586
The theory underlying a six-wave mixing experiment is developed using the methods of molecular quantum electrodynamics. This general theory allows the intensity of the second harmonic radiation generated by the six-wave process to be found for arbitr
Autor:
David L. Andrews, Ian D. Hands
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 31:2809-2824
The theory of sum frequency generation (SFG) is treated within a molecular quantum electrodynamical framework and applied to an ensemble of partially oriented molecules, for lucid analysis of the SFG intensity dependence on beam polarization and mole