Optical spectroscopy study of some 3,4,9,10-tetra-(n-alkoxycarbonyl)-perylenes in Langmuir-Blodgett films

Langmuir (L) and Langmuir-Blodgett (LB) films of some 3,4,9,10-tetra-(n-alkoxy-carbonyl)-perylenes have been studied. On the basis of the surface pressure-mean molecular area isotherms, the molecular alignment on the air-water interface has been estimated. The optical spectroscopic study of the LB films has allowed conclusions to be drawn about the arrangement of the molecules on the quartz slides. The fluorescence spectra of the LB films of the perylene-derivatives investigated have revealed the formation of excited dimers.