FABRICATION OF ALTERNATING DIACETYLENIC MULTILAYERS AND THE ROLE OF SUBPHASE CONDITIONS

Multilayer assemblies were prepared by alternating acid and amine amph ipliles of aliphatic and diacetylenic compounds in an effort to prepar e polar molecular assemblies. Divalent cationic stabilization was requ ired for floating diacetylenic acid monolayers. As a consequence of th e deposition technique ionization in both acid and amine compounds was thus considered, and the isoelectric deposition process developed. Sp ectroscopic analysis showed at the isoelectric pH the alternated acid and amine monolayers to be deposited as fully ionized salts. Structura l investigations showed the aliphatic assemblies to possess near verti cal alignment of the deposited amphiphiles, whereas the diacetylenic c ompounds were tilted to accommodate the diyne functionality.