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Nuclear spin-lattice relaxation and molecular motion in benzene and some benzene derivatives

Figgins, Roger (1966) Nuclear spin-lattice relaxation and molecular motion in benzene and some benzene derivatives. Doctor of Philosophy (PhD) thesis, University of Kent. (doi:10.22024/UniKent/01.02.94347) (KAR id:94347)


Proton spin-lattice relaxation times, T1, have been measured in liquid benzene, liquid 1,3,5 trideuterobenzene and liquid bromobenzene, over a wide temperature range. The T1's of these liquids for a series of solutions in their respective perdeuterated analogues are also reported. The intermolecular and intramolecular contributions to T1 are separated by the technique of extrapolation to zero concentration. An experimental technique for separating the intramolecular dipolar and spin-rotation contributions to T1 is discussed for the cases of benzene and 1,3,5 trideuterobenzene. The results of this separation are examined critically in the light of independent measurements of similar parameters. Reliable values for the reorientational correlation time, τd, are obtained. An attempt to separate out a possible intermolecular spin-rotation interaction is discussed. Approximations for the intramolecular dipolar interaction for a many spin molecule are discussed. A simple indication of departure from non-exponential decay is considered and compared with more rigorous theory.

Item Type: Thesis (Doctor of Philosophy (PhD))
DOI/Identification number: 10.22024/UniKent/01.02.94347
Additional information: This thesis has been digitised by EThOS, the British Library digitisation service, for purposes of preservation and dissemination. It was uploaded to KAR on 25 April 2022 in order to hold its content and record within University of Kent systems. It is available Open Access using a Creative Commons Attribution, Non-commercial, No Derivatives ( licence so that the thesis and its author, can benefit from opportunities for increased readership and citation. This was done in line with University of Kent policies ( If you feel that your rights are compromised by open access to this thesis, or if you would like more information about its availability, please contact us at and we will seriously consider your claim under the terms of our Take-Down Policy (
Uncontrolled keywords: benzene, benzene derivatives, spin-lattice relaxation, molecular motion
Subjects: Q Science > QC Physics
Divisions: Divisions > Division of Natural Sciences > Physics and Astronomy
SWORD Depositor: SWORD Copy
Depositing User: SWORD Copy
Date Deposited: 23 May 2023 14:46 UTC
Last Modified: 23 May 2023 14:46 UTC
Resource URI: (The current URI for this page, for reference purposes)

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