Journal ArticleDOI
Electronic Structure of the S8 Molecule and Its lons and the Transport Properties in the Crystalline Solid and the Liquid
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TLDR
In this paper, a number of relevant intramolecular and intermolecular overlaps are calculated to show that the electron band is sufficiently narrow for a Franck-Condon molecular distortion to accompany the motion of the carrier.Abstract:
Recent work by a number of different authors on mobility of electrons and holes in both crystalline and molten sulphur has shown that this material possesses interesting and unusual transport properties. In this paper an attempt is made to interpret these properties in the light of the electronic structure of S8, S8 − and S8 +. A number of relevant intramolecular and intermolecular overlaps are calculated to show that the electron band is sufficiently narrow for a Franck-Condon molecular distortion to accompany the motion of the carrier. Reasons are presented indicating that this distortion is the same that takes place when S8 is ionized in solution when either the positive or negative ion is formed. It is shown that the most likely rearrangement involves a flattening of the molecule and a change of at least some of the sp3-orbitals to sp2-hybrids.read more
Citations
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Journal ArticleDOI
Homo- and heteroatomic chalcogen rings
TL;DR: A recent review as discussed by the authors summarizes recent progress in the chemistry of homo- and heterocyclic chalcogen species summarizing their preparation, structural characterization, bonding, and spectroscopic properties.
Journal ArticleDOI
The Optical Absorption Spectrum of Fluid Sulfur up to Supercritical Conditions
G. Weser,F. Hensel,W. W. Warren +2 more
TL;DR: Optical absorption spectra in the range 0.5-4.9 eV (250 to 2000 nm) are reported for fluid sulfur up to 1100°C and at pressures up to supercritical pressures.
Journal ArticleDOI
Optical absorption spectra of liquid sulphur over a wide absorption range
TL;DR: The optical absorption coefficient alpha of liquid sulphur has been measured in a wide absorption range from 5.5*10-2 to 2*105 cm-1 at temperatures from 130 to 450 degrees C as mentioned in this paper.
Journal ArticleDOI
Reflection Spectra of Fluid Sulphur in the Sub‐ and Supercritical Region
K. Tamura,H. P. Seyer,F. Hensel +2 more
TL;DR: In this article, the dielectric dispersion of fluid sulphur has been investigated by means of normal incident reflectivity measurements in the range 0.5-6.0 eV over the entire liquid vapor range at temperatures between 120°C and 1100°C, and at pressures between 20 bar and 500 bar.
Journal ArticleDOI
A comparison of the electronic structure and properties of orthorhombic sulphur and monoclinic selenium
R.J.F. Dalrymple,W.E. Spear +1 more
TL;DR: In this paper, electron and hole transport in S α and Se α is compared on the basis of the available drift mobility data and it is concluded that in both crystals holes propagate in a band with a lattice mobility of about 10 cm 2 s −1 V −1.
References
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Journal ArticleDOI
Studies of polaron motion: Part I. The molecular-crystal model
TL;DR: In this paper, a model for polaron motion is described, in simplified form, incorporating the principal physical features of the problem, and the conditions under which the size of the polaron becomes comparable to a lattice spacing (small) are discussed.
Journal ArticleDOI
On electronic current in NiO
TL;DR: In this paper, an extra electron which is tightly bound by an ion in an ionic lattice is discussed, where the wave function of the electron is localized closely around an ion and the motion of an electron is so slow that lattice polarization is induced around the electron.
Journal ArticleDOI
Vibrational assignment and force constants of S8 from a normal-coordinate treatment
TL;DR: In this article, normal coordinate calculations for S8 were revised by using of new far-infrared spectral data that locate the low infrared-active fundamentals at 191 (e1) and 243 (b2) cm−1 (solution state).
Journal ArticleDOI
Electron hopping transport and trapping phenomena in orthorhombic sulphur crystals
D.J. Gibbons,W.E. Spear +1 more
TL;DR: In this paper, a detailed investigation of the temperature dependence of the electron transport in orthorhombic S crystals has been carried out using drift mobility techniques and it is suggested that electron conduction in S is an intermolecular hopping mechanism.
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