Aggregate between xanthan and nonyphenyloxypropyl beta-hydroxyltrimethylammonium bromide in aqueous solution: MesoDyn simulation and binding isotherm measurement

Article Abstract:

The aggregation behavior of the nonyphenyloxypropyl beta-hydroxyltrimethylammonium bromide (C(sub 9)phNBr) and xanthan (XC) in aqueous solution is investigated by MesoDyn density functional simulating and binding isotherm measurement. The results agree with binding isotherms of (C(sub 9)phNBr) to XC obtained through the potentiometric titration method that shows a typical cooperative binding between (C(sub 9)phNBr) and XC.

Bromides, Volumetric analysis, Chemical properties, Bromides (Chemistry)

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Examination of charge-sensitive vibrational modes in bis(ethylenedithio)tetrathiafulvalene

Article Abstract:

The two C=C stretching modes of the five-membered rings of ET (ET = bis (ethylenedithio)- tetrathiafulvalene), namely, v(sub 2) ( in-phase mode) and v(sub 27) (out-of-phase mode) are investigated. It is clarified from the DFT calculations that the frequency of the v(sub 27) mode of the flat ET(super 0) molecule was significantly different from that of the boat-shaped ET(super 0) molecule.

Carbon, Vibrational spectra, Atomic properties

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