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A coordination-marker Raman line of bacteriochlorophyll a in the T1 state

✍ Scribed by Ei-ichi Nishizawa; Yasushi Koyama

Book ID: 103031162
Publisher: Elsevier Science
Year: 1991
Tongue: English
Weight: 382 KB
Volume: 176
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(91)90049-f

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✦ Synopsis

In tetrahydrofuran, acetone, diethyl ether and dichloromethane, the strongest Raman line of bacteriochlorophyll a, to be ascribed to a ring-breathing mode, appeared at 1579, 1584, 1591 and 1596 cm-', respectively, in the T, state. No discrete shift of the particular Raman line, such as that used to discriminate the penta-and hexa-coordinated states in the So state, was found. Changing the amount of tetrahydrofuran in dichloromethane in a solvent mixture caused a continuous shift of the above coordination*marker line, but the frequenciesofother T, Raman lines (at 1712,1476, 1412 and 1328 cm-') remained unchanged. No solvent effect was found for T, (So) bacteriopheophytin a.

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