Preparation of copper sulphide clusters in organic-inorganic composites ofLangmuir-Blodgett films of amphiphilic Schiff bases

Copper sulphide clusters were prepared in Langmuir-Blodgett films of copper complexes of amphiphilic Schiff bases-3,4-dimethoxy-N-benzylidene hexadeyl amine (I) and 3,4-dimethoxy-N-benzylidene-4 '-(hexadecylamino) benzylamine (II) The clusters obtained were analysed using UV-Vis spectroscopy and opti cal microscopy. Brewster angle microscopic studies on monolayers of I and I I at air/water interface showed formation of needle-like domains which seem to cluster faster in I than in II. Atomic force microscopy (AFM) studies a lso showed fairly uniform sized clusters in II whereas in the case of I the y seem to show varying sizes. From the results it is concluded that pi -elo ngation in the polar head groups leads to controlled cluster sizes in compo und II as compared to those in compound I.