文摘
The molecular organization of a mixed film, containing a water-soluble tetracationic porphyrin (TMPyP) and ap-tert-butyl calix[8]arene octacarboxylic acid derivative (C8A), at the air-water interface and on a solid support (LBfilm), has been investigated. Although the TMPyP aggregation was not detected at the air-water interface, TMPyPJ-aggregates have been found in the LB films (Y-type). Unlike tetraanionic porphyrins, for example TSPP, the TMPyPJ-aggregates are not induced by a zwitterion formation. The TMPyP J-aggregation is a result of a "double comb"configuration, where porphyrins from opposite layers are interwoven in a linear infinite J-aggregate. Our resultsconfirm that TMPyP molecules tend to self-aggregate strongly, provided the electrostatic repulsions of their peripheralgroups are cancelled by the anionic groups of the C8A matrix.