Mizoguchi, Tadashi and Limantara, Leenawaty and Matsuura, Katsumi and Shimada, Keizo and Koyama, Yasushi (1996) Aggregation forms of 8-Ethyl-12-Ethyl Farneshyl bacteriochlorophyll c in methanol-chloroform mixtures as revealed by 1H NMR spectroscopy. Journal of Molecular Structure, 379 (1-3). pp. 249-265.
Full text not available from this repository. (Request a copy)Abstract
8-Ethyl-12-ethyl farnesyl bacteriochlorophyll c was dissolved in chloroform and changes in the 1H NMR spectrum due to the titration of methanol were traced. Based on the changes in chemical shift and in peak intensity, the structures of two aggregate forms have been proposed. Form I showing the Qy electron absorption at 675 nm was ascribed to a dimer which has a “piggy-back” stacking of the macrocycles and a pair of MgŻOH coordination bonds. This structure was confirmed by an intermolecular 1H―1H nuclear Overhauser effect correlation. However, Form II showing the Qyabsorption at 705 nm was ascribed to an oligomer in which the dimer units are stacked to form an inclined column.
| Item Type: | Artikel |
|---|---|
| Subjects: | Q Science > QD Chemistry |
| Divisions: | Fakultas Teknologi dan Desain > Teknik Sipil |
| Depositing User: | Admin Repository |
| Date Deposited: | 15 Apr 2020 04:31 |
| Last Modified: | 03 Jun 2022 02:55 |
| URI: | http://eprints.upj.ac.id/id/eprint/73 |
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