Magnetic relaxation and quadrupole splitting for liquid crystalline solutions of poly-γ-benzyl-L-glutamate in CDCl3 and CD2Cl2
- 1 September 1974
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 61 (5) , 1698-1702
- https://doi.org/10.1063/1.1682164
Abstract
The spin‐lattice relaxation time (T1) of protons and deuterons and the deuterium quadrupole splitting in liquid crystalline solutions of poly‐γ‐benzyl‐L‐glutamate (PBLG) in CDCl3 and CD2Cl2 are reported. The proton T1 of PBLG has a strong frequency dependence; as a function of temperature, it shows a minimum at high frequencies. The data cannot be conveniently handled by a rigid ellipsoid model, but calculations based upon a log‐Gaussian distribution in the correlation time show reasonable agreement with experimental data. The deuterium quadrupole splittings of CDCl3 and CD2Cl2 are linear functions of the reciprocal temperature, with slopes independent of concentration. T1 for deuterium in the solvents does not show any anomaly in the concentration range in which the phase transition occurs.Keywords
This publication has 18 references indexed in Scilit:
- Nuclear Magnetic Resonance Relaxation Study of Poly(γ-benzyl L-glutamate) Side-Chain Mobility in Helix-Coil TransitionMacromolecules, 1973
- Proton, Deuteron, and Nitrogen Resonance of Dimethylformamide in Nematic Polypeptide Liquid CrystalsThe Journal of Chemical Physics, 1972
- Molecular order in liquid crystalline solutions of poly(.gamma.-benzyl L-glutamate) in dichloromethaneJournal of the American Chemical Society, 1971
- Distorted α‐helix for poly (γ‐benzyl L‐glutamate) in the nematic solid staleBiopolymers, 1971
- Collagen: Mobile Water Content of Frozen FibersScience, 1970
- Nuclear magnetic resonance study of liquid crystalline solutions of poly(.gamma.-benzyl L-glutamate) in dichloromethane and 1,2-dichloroethaneThe Journal of Physical Chemistry, 1970
- Complete determination of the alignment of dichloromethane-dideuteriodichloro methane molecules in poly(.gamma.-benzyl-L-glutamate) solution by the nuclear magnetic resonance of chlorine-35, deuterium and proton. Comparison of electric and magnetic orderingJournal of the American Chemical Society, 1968
- Magnetic ordering of poly(.gamma.-benzyl L-glutamate) solutionsJournal of the American Chemical Society, 1968
- Distributions of correlation times and their effect on the comparison of molecular motions derived from nuclear spin-lattice and dielectric relaxationTransactions of the Faraday Society, 1964
- Liquid crystalline structure in polypeptide solutions. Part 2Discussions of the Faraday Society, 1958