✦ LIBER ✦

Spin polarization in the lowest triplet state of chlorophyll

✍ Scribed by Joop F. Kleibeuker; Tjeerd J. Schaafsma

Publisher: Elsevier Science
Year: 1974
Tongue: English
Weight: 768 KB
Volume: 29
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(74)80146-6

No coin nor oath required. For personal study only.

✦ Synopsis

Chlorophyll-b in glassy solution has a spin-polarized lowest triplet state at and above 7? K. Ths magnitude of the .).'_, .:

effect is different for MTHF and ethanol as soIvents, in contrast to what is found for the porphin free base. Chloro-_-phyla-a does not exhibit spa-polar~ation under identical conditions as for.c~lorophyli-b. Zero-fidld parameter: are found'to be:

. chlcrophyll-a @THF) D = (281+ 6) x 104'cni-';'E = (39 + 3) x IO4 "R~; chlorophyll-b (MTHF) D 7 (289 f 4) x 113~ cm-';'E = (49 f 3) X IO4 cm-l, ,.

From ESR signal kinetics it follows that for chlorophyl~b, population and depoptilation .mtiy involve the spin level '. ; (. : .

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