4-Isobutyl homologs of farnesyl bacteriochlorophyll c in carbon tetrachloride
- 1 October 1991
- journal article
- research article
- Published by Springer Nature in Photosynthesis Research
- Vol. 30 (1) , 45-48
- https://doi.org/10.1007/bf00035681
Abstract
Absorption (ABS) and circular dichroism (CD) spectra were recorded for 3 concentrations (2.3, 19 and ca. 75 μM) of 4-isobutyl homologs. Monomer spectra were the same as those for 4-n-propyl-5-ethyl farnesyl bacteriochlorophyll c. Pure polymer spectra were obtained by subtracting the 2.3-μM spectra appropriately scaled from the ca. 75-μM spectra. The polymer showed an ABS peak at 742 nm and a CD trough at ca. 742 nm. These properties are in harmony with the aggregate model proposed by Smith KM, Kehrs LA and Fajer J (1983, J Am Chem Soc 105: 1387–1389). A log-logplot of absorbance at 742 nm vs. monomer concentration could be fitted by a straight line of slope 1.6.Keywords
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