LANGMUIR-SCHAEFER FILMS OF DISTYRYLPHENANTHROLINES AND RHENIUM TRICARBONYL CHLORIDE COMPLEXES - HEADGROUP INFLUENCE ON ANISOTROPY

Seven new compounds, four 4,7-bis(p-substituted-styryl)-1,10-phenanthr olines and three rhenium tricarbonyl chloride (diamine) complexes, wer e synthesized and characterized. These compounds which lack alkyl chai ns, formed stable Langmuir films. These films were transferred from th e air-water interface by horizontal lifting to a variety of solid surf aces such as Au/glass, Ge, and quartz with transfer ratios of 1.02+/-0 .10. UV/vis and three FTIR methods (transmission IR, grazing angle ref lectance IR, and attenuated total reflectance IR) were used to analyze the transferred films. p-(methacryloyloxy)styryl]-2,2'-bipyridine]rhe nium tricarbonyl chloride and 4,7-bis(p-nitrostyryl)-1,10-phenanthroli ne showed the largest anisotropy in the Langmuir-Schaefer (LS) films. The orientation of the other compounds varied from moderately anisotro pic to totally isotropic. Hence, the net orientation of these material s in LS films is greatly influenced by the terminating functional grou ps.