FT-IR spectroscopic investigations on sol-gel-derived coatings from acid-modified titanium alkoxides

Sol-gel-derived coatings with potentially bioadhesive properties for applic ation on implant metals were prepared from the reaction products of titaniu m alkoxides and endogenous organic molecules, i.e., trans-propene-1.2.3-tri -carboxylic acid, l-cysteine, l-leucine and taurine. Spin coated titanium s ubstrates and amorphous solids isolated from the modified alkoxide sols wer e characterized by means of FT-IR spectroscopy. Free functional groups, lik e thiol, carboxylate and sulphonate could be detected. On the basis of spec troscopic data, coordination modes were deduced and molecular structure pro posals were given for the new species. (C) 2000 Elsevier Science B.V. All r ights reserved.