The relaxation of chemically induced electron polarization (CIDEP) in photoexcited triplet benzophenone is measured in competition with triplet quenching by 2,2'-azobis[isobutyronitrile] (AIBN). The spin polarization, transferred to the resulting 2-cyano-2-propyl radicals, is determined by time-reso
Measurement of spin-lattice relaxation times of triplet states in fluid solution
โ Scribed by P.W. Atkins; A.J. Dobbs; K.A. McLauchlan
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- English
- Weight
- 192 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
A techniqvc is reported for me&wing triplet spin-lattice relaxatioc times in fluid solution. It is based on the observation of phemically induced electrob spin polarizstion, in the prewlce'of a triplet quencher. Spin-lattice relaxation times of the order of 10 ns are repWed for the dilroquinone triple t in various solven'rs.
๐ SIMILAR VOLUMES
Calculation of tissue TI in double spin-echo imaging (90"-T-I 80"-2T-1 SO0) using two repetition times (6, and b2) has entailed an approximation that ignores the two 180" pulses. The theoretical consequence of the simplification is to overestimate TI with a fractional error that increases with incre