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Indian Journal of Biochemistry and Biophysics (IJBB) >
IJBB Vol.40 [2003] >
IJBB Vol.40(6) [December 2003] >
| Title: | Effect of side chain length on the aggregation of amphiphilic 5,10,15-tris (1-methylpyridinium-4-yl)-20-[4-(alkoxy) phenyl] 21H, 23H porphyrin tritosylates |
| Authors: | Chauhan, S M S
Kumar, Anil
Srinivas, K A
Mishra, M K |
| Keywords: | Aggregation
binary solvent
amphiphilic porphyrins
vesicles
higher aggregates |
| Issue Date: | Dec-2003 |
| Publisher: | CSIR |
| Abstract: | Self-aggregation of cationic amphiphilic 5, 10, 15-tris-(1-methylpyridinium-4-yl)-20-[4-(alkoxy)phenyl]-21H, 23H porphyrin tritosylates (2a-e) with different alkoxy chain length in aqueous and binary solvent systems has been studied by UV-visible, fluorescence and 1H NMR spectroscopy. Binary solvent, concentration, ionic strength, presence of surfactants, and temperature govern the aggregations of 2a-e. Porphyrins having side chain length more than ten carbon atoms (2c-e) form higher aggregates, such as vesicles by sonication of dimers formed initially, whereas porphyrins with lesser side chain length (2a & b) form lower aggregates only. Further, the size and the formation of vesicles have been confirmed by transmission electron microscopy (TEM) and dye entrapment experiments for 2e. |
| Page(s): | 429-438 |
| ISSN: | 0301-1208 |
| Source: | IJBB Vol.40(6) [December 2003]
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