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

Abstract

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 ¹H 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 film of La(HHQ)₂ has good vertical homogeneity and the in-plane conductivity parallel to the compression direction is found to be 3.85 × 10^–5 S m^–1.