ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
An experimental and theoretical study of the 19F relaxation in solid tetrakis (pentafluorosulfanyl) hydrazine due to the reorientation of the SF5 groups has been undertaken. T1 and T1ρ have been measured from 138 to 292 K. T1 is very long, reaching a maximum of 1140 s at the lowest temperature for one sample, and is determined primarily by paramagnetic impurities. T1ρ appears to be influenced by paramagnetic impurities below 227 K and determined by the reorientation of the SF5 groups above 227 K. Expressions for T1 and T1ρ have been derived for two different reorientational models. In the first model the SF5 group is assumed to undergo 90° jumps about the C4 axis; whereas, in the second model the SF5 group is assumed to undergo rotational diffusion about the C4 axis. The T1ρ measurements above 227 K have been fit to the derived expressions to obtain the correlation time for the reorientation.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.454046
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