High-pressure studies of optical dephasing in polymer glasses

Article Abstract:

The effect of high pressure on the optical dephasing of chromophores in organic polymers is evaluated within the stochastic sudden jump two-level system (TLS) model. The modeling was able to account for the observed pressure-induced changes in the slope of the apparent power low temperature dependence even assuming a flat TLS distribution for all pressures.

Polymers, Optical properties, Chromophores

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Electrical relaxation of bismuth germanate silicate glasses

Article Abstract:

The frequency-dependent electrical data of the bismuth germanate silicate (BGSO) glasses are discussed in the framework of the electric modulus representation and the power-law conductivity. The proper relation between the exponent of the power-law conductivity and the stretched exponential of the modulus representation is shown.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Silicates, Bismuth

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Infrared absoption studies of n-heptane under high pressure

Article Abstract:

Mid-infrared spectra of neat n-heptane at room temperature is presented over a pressure range. Results are discussed in terms of liquid-solid phase transition and changes of molecular conformers.

Science & research, Research, Spectra, Hydrocarbons, Infrared spectroscopy

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