Small polaron model for the absorption spectrum of solvated electrons in alcohols

1977 ◽  
Vol 73 (2) ◽  
pp. 274 ◽  
Author(s):  
Robert L. Bush ◽  
Koichi Funabashi
Keyword(s):  
Absorption Spectrum ◽  
Small Polaron ◽  
Solvated Electrons ◽  
Polaron Model

Article

1998 ◽  
Vol 76 (4) ◽  
pp. 411-413
Author(s):  
Yixing Zhao ◽  
Gordon R Freeman
Keyword(s):  
Absorption Spectrum ◽  
Optical Absorption ◽  
Temperature Dependence ◽  
Optical Absorption Spectrum ◽  
Infrared Light ◽  
Solvated Electron ◽  
Solvated Electrons ◽  
Tert Butanol ◽  
Solvent Dependence ◽  
Increasing Temperature

The energy and asymmetry of the optical absorption spectrum of solvated electrons, es- , change in a nonlinear fashion on changing the solvent through the series HOH, CH3OH, CH3CH3OH, (CH3)2CHOH, (CH3)3COH. The ultimate, quantum-statistical mechanical, interpretation of solvated electron spectra is needed to describe the solvent dependence. The previously reported optical spectrum of es- in tert-butanol was somewhat inaccurate, due to a small amount of water in the alcohol and to limitations of the infrared light detector. The present note records the remeasured spectrum and its temperature dependence. The value of the energy at the absorption maximum (EAmax) is 155 zJ (0.97 eV) at 299 K and 112 zJ (0.70 eV) at 338 K; the corresponding values of G epsilon max (10-22 m2 aJ-1) are 1.06 and 0.74. These unusually large changes are attributed to the abnormally rapid decrease of dielectric permittivity of tert-butanol with increasing temperature. The band asymmetry at 299 K is Wb/Wr = 1.8.Key words: optical absorption spectrum, solvated electron, solvent effects, tert-butanol, temperature dependence.

Is there any Correlation between the Mobility and the Absorption Spectra of Solvated Electrons in Polar Solvents?

2000 ◽  
Vol 214 (10) ◽  
Author(s):  
P. Krebs
Keyword(s):  
Absorption Spectrum ◽  
Optical Absorption ◽  
Absorption Spectra ◽  
Optical Absorption Spectrum ◽  
Chem Phys ◽  
Solvated Electrons ◽  
Polar Solvents ◽  
Excess Electrons

Some years ago Jay-Gerin and Ferradini attempted to establish a correlation between the optical absorption spectrum and the mobility of excess electrons in various polar solvents (J. Chem. Phys.

Infrared Spectra of Electronically Doped Polythiophene

2016 ◽  
Vol 1141 ◽  
pp. 222-231
Author(s):  
Hitesh Parmar ◽  
R.K. Shah ◽  
A.T. Oza
Keyword(s):  
Optical Properties ◽  
Band Gap ◽  
Infrared Spectra ◽  
Small Polaron ◽  
Ftir Spectra ◽  
Polaron Model ◽  
Chemical Company ◽  
Electronic Doping ◽  
Semiconducting Property

Polythiophene was prepared by oxidation of thiophene. It was electronically doped with organic acceptors such as TCNE, TCNQ, DDQ, Chloranil and kI-I2. The FTIR spectra revealed only little change of intermolecular band gap of about 0.21ev of polythiophene .However, polythiophene (pure) obtained from chemical company revealed degenerate semiconducting property. The electronic doping with the organic acceptors and kI-I2 revealed optical properties in small polaron model in the FTIR range. Thus both non-degenerate and degenerate polythiophenes were studied with 60% doping of organic acceptors.

Resolution of the Absorption Spectrum of Solvated Electrons

1972 ◽  
Vol 57 (5) ◽  
pp. 2122-2129 ◽  
Author(s):  
Roberto Lugo ◽  
Paul Delahay
Keyword(s):  
Absorption Spectrum ◽  
Solvated Electrons

Electron Transport in Single Crystals of Niobium Dioxide

1974 ◽  
Vol 52 (22) ◽  
pp. 2272-2280 ◽  
Author(s):  
G. Bélanger ◽  
J. Destry ◽  
G. Perluzzo ◽  
P. M. Raccah
Keyword(s):  
Electron Transport ◽  
Single Crystals ◽  
Thermoelectric Power ◽  
Lattice Distortion ◽  
Small Polaron ◽  
Metallic State ◽  
Polaron Model ◽  
Distortion Model ◽  
Niobium Dioxide ◽  
Power Measurements

We have made measurements of the Hall effect and resistivity as well as of thermoelectric power in the temperature range 300–450 K. The results of these measurements are interpreted in terms of a small polaron model of conduction. Additionally, our resistivity and thermoelectric power measurements were extended to 1200 K in an attempt to elucidate the nature of the transition in conductivity occurring in the range 1071–1103 K. For the c direction, this transition appears to be from a semiconducting to a metallic state and a possible explanation for this is given in terms of a lattice distortion model.

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