Analysis of the degree of nematic ordering within dense aqueous dispersions of charged anisotropic colloids by (super 23)Na NMR spectroscopy

Article Abstract:

Aqueous dispersions of Laponite, a synthetic clay neutralized by sodium counterions are used as a model of charged anisotropic colloids to probe the influence of the shape of the particles on their organization within a macroscopic nematic phase. The line shape analysis of the (Super 23)Na NMR spectra and measurements of the Hahn echo attenuation to quantify the degree of alignment of the individual clay particles along a single nematic director.

All Other Basic Inorganic Chemical Manufacturing, Potassium & Sodium Compounds, Sodium & Sodium Compounds, Usage, Nuclear magnetic resonance spectroscopy, Sodium compounds, Aqueous solution reactions, Chemical properties

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A quantum mechanical/molecular mechanical approach to relaxation dynamics: calculation of the optical properties of solvated bacteriochlorophyll-a

Article Abstract:

Issues concerning the reproduction of experimental optical absorption and emission spectra for bacteriochlorophyll-a in menthanol by using the quantum mechanical/molecular mechanical method are discussed.

Research and Development in the Physical, Engineering, and Life Sciences, Chemistry, Research, Chemical research, Chemistry, Physical and theoretical, Physical chemistry, Quantum chemistry

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