Spread monolayers and Langmuir–Blodgett films were prepared with 2,3-bis(N-(3-thiopropyl)phthalimido)-7,8,12,13,17,18-hexakis(octylthio)-5,10,15,20-tetraazaporphyrinate palladium(II) (PdR6R2′TAP). Although monolayers at the water/air interface tend to aggregate, transfer as multilayer films onto quartz slides was possible when the proper experimental conditions were chosen. The properties of the Langmuir–Blodgett films were investigated by UV-Vis and FTIR spectroscopy. Their structures were markedly influenced by transfer temperature. When the monolayer was transferred at T=309 K, the corresponding LB film showed a different packing structure with respect to the films transferred at lower temperatures. This resulted in a better homogeneity, as revealed by optical microscopy. The monolayer thickness and the refractive index were respectively determined by means of ellipsometry and with the aid of dark m-lines spectroscopy for LB films transferred at T=309 K.
Monolayers and Langmuir-Blodgett Films of a Palladium(II)-tetraazaporphyrin
RICCIARDI, Giampaolo;LELJ GAROLLA DI BARD, Francesco;
1999-01-01
Abstract
Spread monolayers and Langmuir–Blodgett films were prepared with 2,3-bis(N-(3-thiopropyl)phthalimido)-7,8,12,13,17,18-hexakis(octylthio)-5,10,15,20-tetraazaporphyrinate palladium(II) (PdR6R2′TAP). Although monolayers at the water/air interface tend to aggregate, transfer as multilayer films onto quartz slides was possible when the proper experimental conditions were chosen. The properties of the Langmuir–Blodgett films were investigated by UV-Vis and FTIR spectroscopy. Their structures were markedly influenced by transfer temperature. When the monolayer was transferred at T=309 K, the corresponding LB film showed a different packing structure with respect to the films transferred at lower temperatures. This resulted in a better homogeneity, as revealed by optical microscopy. The monolayer thickness and the refractive index were respectively determined by means of ellipsometry and with the aid of dark m-lines spectroscopy for LB films transferred at T=309 K.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
