Abstract
A theory is described for U(θ2), the potential of mean torque of rigid solutes at infinite dilution in a uniaxial liquid crystal phase. The general form of U(θ2), is an infinite expansion of modified spherical harmonics CLn (θ2), and truncation at the second rank terms produces a practical form for U(θ2) which is used to calculate Sxx-Syy and Szz , the principal elements of the Saupe ordering matrix of a biaxial solute. The theory predicts that the dependence of Sxx-Syy on Szz for a particular solute-solvent mixture is determined entirely by λ, a parameter describing the departure from cylindrical symmetry of the potential of mean torque, and which is independent of temperature. Furthermore, if U(θ2) is determined entirely by dispersion forces then λ is predicted to be independent of the solvent and to depend entirely on the anisotropy of the electric polarizability tensor of the solute. These predictions are tested by determining the values of Sxx-Syy and Szz by analysing proton N.M.R. spectra of a solut...
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
