Surface-Enhanced Vibrational and RAIRS Studies

Several surface vibrational studies were oriented to determine the effect that different metal surfaces have on the structure and orientation of macrocycles displaying different ring macrocycle size and the electronic energy extension, and the number of the eventual metal coordinating nitrogen New 

Diagonal force constants Interaction force constants  

In other molecular systems containing a nitro fragment, such as 2-nitrofluo-rene and 1-nitropyrene, the adsorbate-metal surface interaction is verified through the oxygen atoms of the nitro groups  

A surface vibrational study of bis(phenylhydrazine)-l,10-phenanthroline (PHP) macrocycle complexes has been intended PHP macrocycles display a non-planar and asymmetric coordination site. No surface effect study is possible to perform on the ligand because it is easily decomposed by solvent dilution. 

These structural characteristics also are responsible of the fact that the SERS spectrum is not observed. The same situation was found for the Co(II), 

---