title: Study by Use of1H NMR Spectroscopy of the Adsorption and Decomposition of Glycine, Leucine, and Derivatives in TiO2Photocatalysis.
abstract: The photocatalytic decomposition and adsorption of glycine (Gly), Gly-Gly, and Gly-Gly-Gly, and leucine (Leu), Leu-Gly, Gly-Leu, and Leu-Gly-Gly, in TiO2(100% anatase crystal form) aqueous suspension were investigated by1H NMR spectroscopy. The side chain of Leu, the carboxylic group, and the peptide bond were recognized as the adsorptive sites of the peptides on the surface of TiO2. For Gly-Leu and Leu-Gly-Gly, the photocatalytic decomposition that took place under UV irradiation resulted from the preferable adsorption of the hydrophobic side chain of Leu on the TiO2surface, while for Gly-Gly and Gly-Gly-Gly, the photodecomposition proceeded by weak adsorption of the peptide bonds on the surface of TiO2.
authors.affiliation: Department of Materials Science and Technology, Nagaoka University of Technology , Nagaoka 940-2188, Japan.
authors.forename: Atsuko Y
authors.initials: AY
authors.lastname: Nosaka
authors.affiliation: Department of Materials Science and Technology, Nagaoka University of Technology , Nagaoka 940-2188, Japan.
authors.forename: Goro
authors.initials: G
authors.lastname: Tanaka
authors.affiliation: Department of Materials Science and Technology, Nagaoka University of Technology , Nagaoka 940-2188, Japan.
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Nosaka