title: Interaction between beta-cyclodextrin and 1,10-phenanthroline: uncommon 2:3 inclusion complex in the solid state.
abstract: The crystallographic structure of the complex formed by beta-cyclodextrin with 1,10-phenanthroline has been studied by X-ray diffraction. The result shows that the complex adopts an uncommon 2:3 stoichiometry in solid state, that is, every complex unit contains three 1,10-phenanthroline molecules and two beta-cyclodextrin molecules, where two 1,10-phenanthroline molecules individually occupy two cyclodextrin cavities, and the third guest molecule is located in the interstitial space between two head-to-head cyclodextrin molecules. The intermolecular hydrogen bonds between the adjacent complex units further link these individual monomers to a channel-type assembly. Furthermore, 1H and 2D NMR spectroscopy has been employed to investigate the inclusion behavior between the host beta-cyclodextrin and guest 1,10-phenanthroline in aqueous solution.
authors.affiliation: Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, PR China. yuliu@public.tpt.tj.cn
authors.forename: Yu
authors.initials: Y
authors.lastname: Liu
authors.forename: Guo-Song
authors.initials: GS
authors.lastname: Chen
authors.forename: Heng-Yi
authors.initials: HY
authors.lastname: Zhang
authors.forename: Hai-Bin
authors.initials: HB
authors.lastname: Song
authors.forename: Fei
authors.initials: F
authors.lastname: Ding
mesh_terms: D002236:Carbohydrate Conformation; D018360:Crystallography, X-Ray; D003505:Cyclodextrins / Q000737:chemistry*; D006860:Hydrogen Bonding; D017665:Hydroxyl Radical / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D010618:Phenanthrolines / Q000737:chemistry*; D014867:Water / Q000737:chemistry; D047392:beta-Cyclodextrins
chemical_list: D003505:Cyclodextrins; D010618:Phenanthrolines; D047392:beta-Cyclodextrins; D014867:Water; D017665:Hydroxyl Radical