Studies on mixed monolayers and Langmuir-Blodgett films of Schiff-base complex Cu(SBC18)(2) and Calix[4]arene

Mixed monolayers of Schiff-base complex Cu(SBC18)(2) with an octadecyl hydr ocarbon chain and Calix[4]arene without a long alkyl chain at an air/water interface were studied in ultrapure water at different temperatures. Interf ace behavior and thermodynamic estimation of the mixed monolayer indicate t hat a strong intermolecular interaction exists between the mixed components (Cu(SBC18)(2) and calix[4]arene) and the two-dimensional miscibility decre ases with the molar fraction of Cu(SBC18)(2). It is noticeable that the cal ix[4]arene monolayer can be transferred successfully onto solid substrates due to the introduction of Cu(SBC18)(2). FTIR transmission and UV-Vis absor ption spectra of mixed LB films provide further evidence of molecular inter action between the headgroups. (C) 2001 Academic Press.