Monolayers of novel amphiphile with schiff base moiety as headgroup and its complex of copper(II)

A novel amphiphile 2.1-dihydroxy-N-octadecylbenzylideneamine (abbreviated a s SEC18) bearing a schiff base moiety as headgroup, and its complex Bis(2,3 -dihydroxy-N- o ctadecylbenzylideneaminato) Copper(II) (abbreviated as Cu(S BC18)(2)) were synthesized successfully. The pi -A isotherms were conducted to explore their monolayer behavior. The pi -A isotherm of an SBC18 monola yer shows that an orientational change may be accompanied by increase of in tramolecular hydrogen bonds in the plateau-like region, which were further confirmed by FTIR and UV-Vis spectroscopic results. By Comparison the plate au-like region disappeared in TC-A isotherms of surface film and subphase f ilm of Cu (SBC18)(2) which may be due to coordination of Cu2+ to SBC18 elim inating conversion of intermolecular to intramolecular hydrogen bonds. (C) 2001 Elsevier Science B.V. All rights reserved.