title: Characterization of the complex formation of 1,6-anhydro-beta-maltotriose with potassium using 1H and 39K NMR spectroscopy.
abstract: The (1)H and (39)K longitudinal relaxation times (T(1)) and (1)H diffusion coefficients were measured to investigate the complex formation of 1,6-anhydro-beta-maltotriose and potassium ions. Although the (1)H-T(1) values of H3', H5', H1'' and H4'' decreased in the presence of potassium ions, (1)H chemical shifts and (1)H diffusion coefficients did not show significant changes. The long-range coupling constants of (3)J(C-H) around the glycosyl bonds did not show significant changes either. In the measurements of (39)K spectra, the (39)K signal obviously broadened and the (39)K-T(1) values decreased in the presence of 1,6-anhydro-beta-maltotriose, indicating the complex formation of 1,6-anhydro-beta-maltotriose and potassium ions. These results indicate that the conformation and molecular volume were unaffected in the complex formation.
authors: Graduate School of Chemistry, Meisei University, Hodokubo, Hino, Tokyo 191-8506, Japan.
authors: Takayuki
authors: T
authors: Kato
authors: Koji
authors: K
authors: Tsubono
authors: Osamu
authors: O
authors: Kamo
authors: Toshiyo
authors: T
authors: Kato
authors: Kazuo
authors: K
authors: Furihata
authors: Takashi
authors: T
authors: Fujimoto
authors: Tomoya
authors: T
authors: Machinami
authors: Mitsuru
authors: M
authors: Tashiro