We report herein strong intermetallic interactions of Cu(I1) chelates formed at the surface of bilayer aggregates.Synthetic bilayer membranes are two-dimensional arrays of molecules and are useful vehicles for ordering of part or whole molecules because of their structural flexibility. The molecular ordering produces various interesting properties. For instance, efficient energy migration among chromophores was implied in ammonium bilayers that contained anthracene' and carbazole2 units, and large enhancements due to extensive dipolar coupling were observed in circular dichroism of chiral bilayer membranes." These unique characteristics should be similarly applicable to preparation of ordered arrays of metal chelates.Simon and others carried out extensive investigations on micellar and liquid-crystalline metal c~m p l e x e s~~~ and found, among other results, a remarkable enhancement of the dioxygen stability constant for micellar cobaltous complexes.8 We examined previously the interaction of metal ions with ligands at the bilayer surface, which caused subsequent changes of membrane physical state^.^,'^ In these cases, however, the direct interaction of metal

The amphiphile (I), containing the azobenzene moiety in the hydrophobic part and a cyclic tetramine as the hydrophilic head, was dispersed in deionized water by sonication together with CuClz.