The solid channel structure inclusion complex formed between guest styrene and host γ-cyclodextrin

2006-06-01
Uyar, Tamer
El-Shafei, Ahmed
Wang, Xingwu
Hacaloğlu, Jale
Tonelli, Alan E.
The solid complex of guest styrene included inside the channels of host gamma-cyclodextrin (styrene/gamma-CDchannnel-IC) was formed in order to perform polymerization of styrene in a confined environment (gamma-CD channels). The experimental molar ratio of styrene to gamma-CD in styrene/gamma-CDchannel-IC was found to be 2:1, which is consistent with molecular modeling studies, utilizing Quantum Mechanics PM3 parameters that indicate the gamma-CD/two styrene molecular complex is the most energetically favorable. Consistent with modeling of the gamma-CD/two styrene molecular complex, no experimental indication of intermolecular pi-pi interactions between the pairs of included styrene molecules inside the gamma-CD channels was observed. Once included in the host T-CD cavities, the thermal stability of normally volatile bulk styrene to elevated temperatures (much above its boiling point) was observed until the gamma-CD host molecules themselves began to degrade at similar to 300 degrees C. In addition, the thermal degradation of host gamma-CD from the styrene/gamma-CDchannel-IC was observed to be different from that of pure gamma-CD due to codegradation of styrene and gamma-CD.
Citation Formats
T. Uyar, A. El-Shafei, X. Wang, J. Hacaloğlu, and A. E. Tonelli, “The solid channel structure inclusion complex formed between guest styrene and host γ-cyclodextrin,” pp. 109–121, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/31823.