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Citation: MAO Xiang, HUANG Peng-Cheng. Preparation and Characterization of Inclusion Complex of p-Diethynylbenzene with β-Cyclodextrin[J]. Chinese Journal of Applied Chemistry, ;2005, 22(10): 1079-1082. shu

Preparation and Characterization of Inclusion Complex of p-Diethynylbenzene with β-Cyclodextrin

MAO Xiang ,
HUANG Peng-Cheng ^,

1.
Department of Polymer Materials and Composite, School of Material Science and Engineering, Beihang University, Beijing 100083

Corresponding author: HUANG Peng-Cheng,
Received Date: 22 December 2004
Available Online: 16 April 2005
Fund Project: 国家自然科学基金资助项目(29974002) (29974002)

The inclusion complex(IC) of p-diethynylbenzene(DEB) with β-cyclodextrin was synthesized via different methods and was characterized by ¹H NMR spectroscopy,XRD and DSC.The results show that(insoluble) DEB dissolves in D₂O after entering the cavity of β-CD,and the DEB molecules in the cavity cause an upfield shift of H-3 and H-5 of β-cyclodextrin in the ¹H NMR spectrum.The DSC and XRD analyses indicate that there is no crystalline DEB in the inclusion complex.The presence of DEB in the cavity makes the dehydration peak of β-cyclodextrin shift to lower temperature.The fluorescence spectra of the solid inclusion complex and DEB show that DEB molecules have entered the cavities of β-cyclodextrin either in single or in dimolecular forms.The absence of the emission of solid DEB in the solid-state emission spectrum of the inclusion complex also suggests that complexation can inhibit the π-π stacking of DEB effectively.
- β-cyclodextrin,
- diethynylbenzene,
- inclusion complex,
- π-π stacking
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