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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

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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
 
Creator Chauhan, S M S
Kumar, Anil
Srinivas, K A
Mishra, M K
 
Subject Aggregation
binary solvent
amphiphilic porphyrins
vesicles
higher aggregates
 
Description 429-438
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.
 
Date 2009-04-13T11:46:50Z
2009-04-13T11:46:50Z
2003-12
 
Type Article
 
Identifier 0301-1208
http://hdl.handle.net/123456789/3821
 
Language en_US
 
Publisher CSIR
 
Source IJBB Vol.40(6) [December 2003]