Dissociation characteristic of the inclusion complex of cyclomaltohexaose (alpha-cyclodextrin) with 1-methylcyclopropene in response to stepwise rising relative humidity.
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.
Neoh
Tze Loon
TL
Department of Applied Biological Science, Kagawa University, Kagawa 761-0795, Japan. neoh@ag.kagawa-u.ac.jp
Koecher
Katie
K
Reineccius
Gary
G
Furuta
Takeshi
T
Yoshii
Hidefumi
H
D003521:Cyclopropanes / Q000737:chemistry*; D006813:Humidity; D008855:Microscopy, Electron, Scanning; D014961:X-Ray Diffraction; D047391:alpha-Cyclodextrins / Q000737:chemistry*
D003521:Cyclopropanes; D047391:alpha-Cyclodextrins; C412563:1-methylcyclopropene; C032613:alpha-cyclodextrin