Supramolecular Structure of beta-Cyclodextrin and Poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) Inclusion Complexes
文献类型：期刊论文
| 作者 | Tsai, Chi-Chun2; Leng, Siwei2; Jeong, Kwang-Un3; Van Horn, Ryan M.2; Wang, Chien-Lung2; Zhang, Wen-Bin2; Graham, Matthew J.2; Huang, Jin4; Ho, Rong-Ming5; Chen, Yongming1 |
| 刊名 | MACROMOLECULES
 |
| 出版日期 | 2010-11-23 |
| 卷号 | 43期号:22页码:9454-9461 |
| ISSN号 | 0024-9297 |
| DOI | 10.1021/ma101943k |
| 英文摘要 | Supramolecular crystals were prepared via self assembly of a series of inclusion complexes of beta cyclodextrin (beta CD) with poly(ethylene oxide) block poly(propylene oxide) block poly(ethylene oxide) (PEO b-PPO b PEO) block copolymer In this study, two PEO b PPO b PEO copolymers were used with different molecular weights for the PEO blocks On the basis of two-dimensional (2D) wide angle X ray diffraction (WAXD) and selected area electron diffraction (SAED) experiments, the supramolecular crystal structure was determined to be a monoclinic lattice with a = 1 910 nm b = 2 426 nm, c = 1 568 nm and beta = 111 degrees for both inclusion complex systems Each crystal unit cell contained four inclusion complexes The space group was identified to be C-2 symmetry based on the relationship among diffraction spot intensity and systematic extinctions With the help of computer simulations of the supramolecular structure, the packing of inclusion complexes in the crystal lattice could be achieved The simulated 2D WAXD fiber patterns and SAED patterns agreed well with the experimental results Observations of the morphology in transmission electron microscopy combined with the [001] zone SAED patterns indicated that the supramolecular crystals are lozenge shaped, bound by four (110) planes Furthermore the tethered PEO blocks were found to crystallize, and the c axis of the PEO crystals was nearly parallel to the lamellar surface normal of the supramolecular crystals The existence of PEO crystals resulted in additional proof that beta-CDs are only selectively threaded onto the PPO blocks when forming the inclusion complexes These PEO crystals acted as locks to prevent the dethreading of the beta-CDs from the complexes and physically stabilized the supramolecular structure |
| 语种 | 英语 |
| WOS记录号 | WOS:000284177000031 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/70273]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Chen, Yongming |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China 2.Univ Akron, Dept Polymer Sci, Coll Polymer Sci & Polymer Engn, Akron, OH 44325 USA 3.Chonbuk Natl Univ, Polymer BIN Fus Res Ctr, Dept Polymer Nano Sci & Technol, Jeonju 561756, Jeonbuk, South Korea 4.Wuhan Univ Technol, Coll Chem Engn, Wuhan 430070, Peoples R China 5.Natl Tsing Hua Univ, Dept Chem Engn, Hsinchu 30013, Taiwan 6.Inst Charles Sadron, F-67034 Strasbourg, France |
| 推荐引用方式 GB/T 7714 | Tsai, Chi-Chun,Leng, Siwei,Jeong, Kwang-Un,et al. Supramolecular Structure of beta-Cyclodextrin and Poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) Inclusion Complexes[J]. MACROMOLECULES,2010,43(22):9454-9461. |
| APA | Tsai, Chi-Chun.,Leng, Siwei.,Jeong, Kwang-Un.,Van Horn, Ryan M..,Wang, Chien-Lung.,...&Cheng, Stephen Z. D..(2010).Supramolecular Structure of beta-Cyclodextrin and Poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) Inclusion Complexes.MACROMOLECULES,43(22),9454-9461. |
| MLA | Tsai, Chi-Chun,et al."Supramolecular Structure of beta-Cyclodextrin and Poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) Inclusion Complexes".MACROMOLECULES 43.22(2010):9454-9461. |
入库方式： OAI收割
来源：化学研究所
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