Liu Yu, Yang Zi-Xin, Chen Yong, Song Yun, Shao Nan
Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China.
ACS Nano. 2008 Mar;2(3):554-60. doi: 10.1021/nn700288q.
The preorganized bis(polypseudorotaxane) (approximately 20 nm long) formed by the multiple metallo-bridged poly(beta-cyclodextrin)s has been successfully converted to the lengthened bis(molecular tube) (approximately 200 nm long) through the intermolecular joining of approximately 10 discrete bis(polypseudorotaxane) units and the subsequent removal of the polymer templates. The obtained bis(molecular tube), which is quite soluble in water, dimethylformamide, and dimethyl sulfoxide, has been comprehensively characterized by NMR, gel permeation chromatography, static light scattering, X-ray powder diffraction, thermogravimetric analysis, scanning electron microscopy, transmission electron microscopy, and scanning tunneling microscopy. Further investigations demonstrate that this bis(molecular tube) can capture C(60) through interaction with its many pi-electron-rich biquinolino groups.
由多个金属桥连的聚（β-环糊精）形成的预组织双（聚准轮烷）（长度约20纳米）已通过约10个离散双（聚准轮烷）单元的分子间连接以及随后聚合物模板的去除成功转化为延长的双（分子管）（长度约200纳米）。所得的双（分子管）在水、二甲基甲酰胺和二甲基亚砜中相当易溶，已通过核磁共振、凝胶渗透色谱、静态光散射、X射线粉末衍射、热重分析、扫描电子显微镜、透射电子显微镜和扫描隧道显微镜进行了全面表征。进一步研究表明，这种双（分子管）可通过与其许多富π电子的联喹啉基团相互作用捕获C(60)。
