title: Observation of 1,6-anhydro-beta-maltose and 1,6-anhydro-beta-D-glucopyranose complexed with rubidium by NMR spectroscopy and electrospray ionization mass spectrometry.
abstract: A complex of 1,6-anhydro-beta-maltose with rubidium and that of 1,6-anhydro-beta-D-glucopyranose with rubidium were characterized using 87Rb NMR spectroscopy, diffusion-ordered NMR spectroscopy (DOSY) and electrospray ionization mass spectrometry (ESI-MS). Although subtle differences were observed in the 1H chemical shifts of 1,6-anhydro-beta-maltose in between the presence and absence of rubidium in deuterium oxide, measurements of the spin-lattice relaxation time (T1) of the 87Rb nucleus, the diffusion coefficients of 1,6-anhydro-beta-maltose using 1H DOSY and ESI-MS indicated the complex formation of 1,6-anhydro-beta-maltose with rubidium. The complex formation with rubidium was also identified for 1,6-anhydro-beta-D-glucopyranose using NMR and ESI-MS techniques.
authors.affiliation: Department of Chemistry, College of Science and Technology, Meisei University, Hino, Tokyo 191-8506, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Fujimoto
authors.forename: Satoshi
authors.initials: S
authors.lastname: Sakurai
authors.forename: Ayumi
authors.initials: A
authors.lastname: Tsutsui
authors.forename: Kazuo
authors.initials: K
authors.lastname: Furihata
authors.forename: Tomoya
authors.initials: T
authors.lastname: Machinami
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Tashiro
mesh_terms: D005947:Glucose / Q000031:analogs & derivatives* / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008320:Maltose / Q000031:analogs & derivatives* / Q000737:chemistry*; D012414:Rubidium Radioisotopes / Q000737:chemistry* / Q000378:metabolism; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
chemical_list: C506931:1,6-anhydro-beta-maltose; D012414:Rubidium Radioisotopes; C014989:1,6-anhydro-beta-glucopyranose; D008320:Maltose; D005947:Glucose