Blodgett Multilayers of Mono- and Bisporphyrin Species

Langmuir-Blodgett Multilayers of Mono- and Bisporphyrin Species 

Porphyrin dimers linked by barbituric acid derivatives can form well aligned species in which UV-visible absorbance and fluorescence properties are 

The construction of dyad systems within a LB architecture provides a straightforward approach to study photoinduced electron transfer. Ito has reported the construction of successive polyimide LB layers incorporating a ZnTPP electron donor, an insulating film, and pyromellitimide as an electron acceptor. The insulating film is equivalent to the spacer in covalent species in solution studies. It was shown that the efficiency of the eT process strongly depends of the thickness of the insulating layer. 

Porphyrins alone can be incorporated in LB monolayer films to confer tunneling diode and switching diode capabilities to the assembly. A highly lipophilic 

The conclusion concerning the geometry adopted by 162 in LB films is that a folding of the amide bonds generates a conformer in which a distance of ca. 8 A between the electron donor and acceptor is observed, instead of the 18 A distance obtained from solution studies. 

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