作者:Hai Ming Wang、Gerhard Wenz
DOI:10.1002/asia.201100217
日期:2011.9.5
A series of hydrophilic per‐6‐thio‐6‐deoxy‐γ‐cyclodextrins (CDs) were synthesized from per‐6‐iodo‐6‐deoxy‐γ‐CD. These new hosts are able to solubilize polycyclic aromatic guests in aqueous solution to much higher extents than native CDs. Phase‐solubility diagrams were mostly linear in accordance with both 1:1 and 1:2 CD–guest complexes in aqueous solution. The stoichiometry of the inclusion complexes
从每6-碘-6-脱氧-γ-CD合成了一系列亲水的6-6-硫-6-脱氧-γ-环糊精(CD)。这些新的宿主能够以比天然CD高得多的程度溶解水溶液中的多环芳族客体。相溶性图根据水溶液中1:1和1:2 CD-客体配合物的关系大多是线性的。通过荧光光谱进一步研究了包合物的化学计量,该光谱揭示了1:2络合物典型的非常明显的斯托克斯位移。通过使用CD和客体的横截面积,通过客体二聚体形成的量子力学计算和对空间填充的考虑,进一步巩固了这一发现。计算出的二聚能与针对1:2配合物测得的结合自由能密切相关,