In the liquid crystal "Phase IV" which exhibits its nematic range between 16 and 76 "C ENDOR spectra of perinaphthenyi and tri-t-butylphencxyl radicals collld be recorded. it is demonstrated that the combined use of the ENDOR and liquid crystal methods yieIds valuabIe structural information.
Observation of quadrupole splittings of organic radicals in solution by endor in liquid crystals
✍ Scribed by K.P. Dinse; K. Möbius; M. Plato; R. Biehl; H. Haustein
- Publisher
- Elsevier Science
- Year
- 1972
- Tongue
- English
- Weight
- 393 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The analysis of the Iine'shifts yields ezq;3 Q//I = -2.5 MHz. This result could be rationalized by a population analysis of the nitrogen bonds, The theory predicts that the main contribution to the observed splitting comes from ihc unpzked n-electron.
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Solution \*sM-ENDOR and TRIPLE n~~~~+nce esperiments have been performed on the bacteriochlorophyll a (BChl a) zJ anion and cation radicals enriched in 25hIg. The 2shfg isotropic hyperfime coupling constants for BChl a\* and BChl ar have been determined. The vaIues are in good agreement with those o
The cation radical of the primary donor P7oo of photosystem I (PS I) is investigated by ESEEM on single crystals of PSI from the cyanobacterium Synechococcus elongatus. The nuclear quadrupole parameters K and ~ of five different 14N nuclei are determined and 14N hyperfine couplings (hfc's) of PT"o~