AbstractsPhysics

Heisenberg spin exchange in two triglycerides

by Alvaro Federico Demarzi




Institution: California State University – Northridge
Department: Department of Physics
Degree: MS
Year: 1973
Keywords: Triglycerides – Research.; Dissertations, Academic  – CSUN  – Physics
Record ID: 1525847
Full text PDF: http://hdl.handle.net/10211.2/4389


Abstract

Studies of Heisenberg Spin Exchange (HSE) of DTBN in Glyceryl Tributyrate (TB), and Glyceryl Tricaproate (TC) were performed. Concentrations of 1.5 x 10-2 M and 3.0 x lo-2 M of DTBN in the triglycerides were used. HSE was observed from 20??C to 60??C and values of JT=1 were obtained which indicate that DTBN undergoes intermediate exchange. This unexpected result is explained in terms of the solvent's molecular size. The exchange frequency WHE was found to be higher in TB than in TC. Similar results were obtained T2-1 and k the second-order rate constant, namely, that they were higher in TB than in TC. The values for WHE, T2-1 and k fell within typical values found in the literature. Also measured were the g factors and the hyperfine coupling constants. For DTBN in TB g = 2.0057 and aN= 15.4 G, and for DTBN in TC g == 2.0058 and aN = 15.4 G. Values of g = 2.0053 and aN= 17.1 G for DTBN in water were assumed.