Preparation and characterization of Langmuir-Blodgett films of N-hexadecyl-8-hydroxy-2-quinolinecarboxamide and its lanthanum complex

A new amphiphilic ligand, N-hexadecyl-8-hydroxy-2-quinolinecarboxamide (HHQ), and its lanthanum complex La(HHQ)(2), were synthesized and characterized by elemental analysis, IR and H-1 NMR spectroscopy. The characteristics of the monolayer, Langmuir-Blodgett (LB) films and cast films of HHQ and La(HHQ)(2) were investigated by different physical methods, including surface pressure-area isotherms, absorption and fluorescence spectra and low-angle X-ray diffraction analysis. The LB him of La(HHQ)(2) has good vertical homogeneity and the in-plane conductivity parallel to the compression direction is found to be 3.85 x 10(-5) S m(-1).