Now showing items 61-70 of 140
On the application of group theory to molecular excitons
(Elsevier, 1975-08)
In this paper a group theoretical approach was employed for the classification and construction of molecular exciton wavefunctions for two important crystal structures (naphthalene--anthracene and benzene), utilizing the ...
Schrodinger equation for a dirac bubble potential
(Elsevier, 1979-07-15)
The quantum-mechanical problem of a particle moving in a "Dirac bubble potential" U(r) = ([lambda]/ro)[delta](r - ro) is solved exactly for both bound and continuum states by making use of partial wave Green's functions ...
Molecular structure of Pt(PF3)4 by gas-phase electron diffraction
(Elsevier, 1976-03)
The structure of Pt(PF3)4 was reinvestigated making use of a new theory of intramolecular dynamic scattering. Derived molecular parameters were insensitive to the dynamic corrections. Refinements for this tetrahedral ...
An energy denominator study of the phonon side band in isotopic mixed naphthalene crystals
(Elsevier, 1974-11-15)
The fluorescence phonon sidebands of C10H8 and 1,4,5,8-C10D4H4 guests in C10H8 are studied and compared at 2 K. The mild differences are attributed to the increased delocalization of the C10D4H4 1B2u electronic state. The ...
Energy transfer in one-, two-, and three-dimensionally coupled salts of divalent manganese
(Elsevier, 1979-12-01)
The emission spectra of several antiferromagnetic complexes of divalent manganese (CsMnBr3, Rb2MnCl4, CsMnCl3 and KMnCl3) which contain rare-earth ion impurities have been studied as a function of temperature. In all cases ...
Phonons in disordered molecular solids: Raman spectra of heavily doped mixed crystals of benzene and perdeuterobenzene
(The American Institute of Physics, 1973-01-01)
Raman spectra of mixed crystals of benezene‐h6 and benzene‐d6 have been studied throughout the whole concentration range (0%–100%). They are discussed in the virtual crystal limit, suitable for small trap depths. It is ...
Spectroscopic evidence for a continuous change in molecular and crystal structure: deformation of biphenyl in the low temperature solid
(Elsevier, 1974-01-01)
A Raman temperature study of biphenyl-h10 and biphenyl-d10 crystals reveals an unusual spectral change over a wide temperature region. Many internal and external infrared-active modes appear gradually as the temperature ...
Tetrahedral complexes from N,N' ethylenedimorpholine[1]
(Elsevier, 1970-01)
The ligand N,N' ethylenedimorpholine (EDM) reacts with divalent first row transition metal halides to give complexes of the type MX2(EDM); (M = Zn, Cu, Co, Ni) (X = Cl, Br, I). Although there are four potential donor atoms ...
Localized In‐Band Rotational Phonons in Mixed Molecular Crystals: Electronic Spectra of Naphthalene Doped Biphenyl and Durene
(The American Institute of Physics, 1972-04-01)
Exciton percolation. II: Naphthalene 1B2u supertransfer
(Elsevier, 1977-05)
The exciton percolation theory has been tested for the migration of the lowest singlet exciton in our model organic alloy system at low temperature (2 K): binary isotopic mixed crystals of naphthalene (C10H8--C10D8), with ...