title: Dissociation characteristic of the inclusion complex of cyclomaltohexaose (alpha-cyclodextrin) with 1-methylcyclopropene in response to stepwise rising relative humidity.
abstract: The dissociation of a crystalline complex of cyclomaltohexaose (alpha-cyclodextrin) and 1-methylcyclopropene has been studied in response to stepwise rising relative humidity at 50 degrees C using a dynamic vapor sorption instrument. The dissociation of the inclusion complex was monitored with a proton transfer reaction mass spectrometer. The increase in relative humidity generally triggered the complex dissociation. However, the dissociation was greatly retarded at 80% relative humidity, presumably owing to collapse of the crystalline structure. Abrupt dissociation was observed at 90% relative humidity which corresponded to complex dissolution. The changes in powder X-ray diffraction pattern of the inclusion complex during the storage period were also investigated.
authors.affiliation: Department of Applied Biological Science, Kagawa University, Kagawa 761-0795, Japan. neoh@ag.kagawa-u.ac.jp
authors.forename: Tze Loon
authors.initials: TL
authors.lastname: Neoh
authors.forename: Katie
authors.initials: K
authors.lastname: Koecher
authors.forename: Gary
authors.initials: G
authors.lastname: Reineccius
authors.forename: Takeshi
authors.initials: T
authors.lastname: Furuta
authors.forename: Hidefumi
authors.initials: H
authors.lastname: Yoshii
mesh_terms: D003521:Cyclopropanes / Q000737:chemistry*; D006813:Humidity; D008855:Microscopy, Electron, Scanning; D014961:X-Ray Diffraction; D047391:alpha-Cyclodextrins / Q000737:chemistry*
chemical_list: D003521:Cyclopropanes; D047391:alpha-Cyclodextrins; C412563:1-methylcyclopropene; C032613:alpha-cyclodextrin