某些有机物在氧化物载体表面的自发单层分散

XRD and FT-IR methods were applied to the studies of organic monolayer dispersionsystems. Naphthalene, borneol, benzoic acid, salicylic acid, phthalic acid and tartaric acid weremixed with γ-Al2O3 and SiO2 separately. The results showed that the organic compounds canalso disperse spontaneously onto the surfaces of different oxide-supports to become high dispersionstates like the behavior of inorganic salts and oxides. The organic substances studied are moreready to disperse with 1ess carboxyl or hydroxyl groups on their aromatic nucleus, suggesting themigration on the surface of the support is rate-determining during the dispersion. This point ofview is supported by the result of IR spectroscopy. The IR spectra of dispersed systems suggestthat the carboxy1 may react with the surface hydroxyl groups of the support to form salt-likestructures on the surface.