Zero-field absorption ODMR of reaction centers of rhodobacter sphaeroides at temperatures between 4.2 and 75 k

✍ Scribed by J. Ullrich; A. Angerhofer; J.U. Von Schütz; H.C. Wolf

• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 467 KB
• Volume: 140
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(87)80758-3

✦ Synopsis

Absorption-detected ODMR of reaction centers from different strains of Rhodobacter sphaeroides in the temperature range from 4.2 to 75 K are reported. The D and E parameters are independent of temperature. There is no indication of a temperaturedependent charge transfer admixture. Absorption ODMR intensities are interpreted with spin-lattice relaxation and triplet-triplet transfer to the carotinoid of the reaction center. The zfs values of the carotinoid triplet are D= (2823~4) x 10m4 cm-' andE=(445~1)~10-~cm-'.