SEIRA of the Ligand Azabipiridyl and Its Complexes

The cobalt and the N-hexyl nickel substituted complexes structure in the surface is different from that of the compound at higher concentrations this was 

The multilayer spectrum of the Co complex is not different to that obtained in KBr pellets. The most relevant spectral changes in frequency and the relative intensity by dilution in the case of the copper complex, concern only the bands in the range 1,390-1,450 cm , and the one near 1,170 cm The spectrum of the copper complex dispersed in KBr is not much different to that of the multilayer sample on the gold surface. The surface effect is less important in this case than in the others three macrocycles. 

The SEIRA study of the compounds deposited onto Au films reveals slight structural modifications upon dilution. 

Little work dealing with vibrational studies of the macrocycle-surface interaction have been published for naphthalocyanine and its metal complexes. One deals with the ZnNc complex for which the orientation onto different substrates has been inferred from IR reflection-absorption spectroscopy and other measurements three types of molecular orientations were assigned for the deposited thin films depending on NaCl, graphite and glass at 250 = C. The orientation of different metal complexes of naphthalocyanine was studied by X-ray 

P orientation, in which their molecular planes came into a parallel contact to the substrate surface AlNcCl and GaNcF, and VONc took the eclipsed, slipped stacking, I orientation, holding their molecular planes slightly inclined to the substrate surface. 

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