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- W2012112191 abstract "The relaxation dynamics of carbon disulfide are investigated in mixtures with polystyrene (PS) using the time-resolved optical heterodyne-detected optical Kerr effect (OHD-OKE). The data are analyzed using both the model-dependent approach, which assumes four distinct temporal responses, and the model-independent Fourier transform approach, which generates a spectral response that can be compared with results obtained by depolarized Rayleigh scattering. A slow dynamics is observed for the OHD-OKE transient decaying exponentially with a time constant that varies from 1.68ps for neat CS2 to 3.76ps for the most concentrated CS2∕PS mixture. The increase of this time constant accompanies an increase in the viscosity of the mixture, so we can associate this component with the diffusive reorientation process of the induced polarizability anisotropy of the carbon disulfide in the mixture. The short-time nuclear response is characterized in the frequency domain by a broad band that peaks around 30cm−1 for neat carbon disulfide, and is associated with a complex relaxation pattern. The vibrational distribution shifts to higher frequencies when the PS concentration is increased in the mixture. This result is discussed in terms of an increase in the interaction strength between the PS phenyl rings and the carbon disulfide molecules." @default.
- W2012112191 created "2016-06-24" @default.
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- W2012112191 date "2005-08-01" @default.
- W2012112191 modified "2023-10-01" @default.
- W2012112191 title "Time-resolved optical Kerr-effect investigation on CS2/polystyrene mixtures" @default.
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- W2012112191 doi "https://doi.org/10.1063/1.1994850" @default.
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