Functionalization of Supramolecular Polymers

1.超分子聚合物的构建当客体部分共价连接到环糊精(CD)上时，它们形成超分子二聚体、环状菊花链、超分子低聚物和聚合物。发现T-Boc-肉桂酰胺-α-CD在水溶液中形成了手性超分子聚合物。合成了超分子聚[2]轮烷聚合物和超分子α-，β-CD共聚物。2.超分子聚合物的动力学研究了一种新的一锅法合成含γ-Cd的聚轮烷，方法是在γ-Cd存在下，通过高分子链末端的9-蒽基的光环二聚反应合成了α-CD的拟轮烷。通过将α-Cd穿接到轴分子上的动力学控制，我们构建了含吡啶端帽的轮烷的拟轮烷。连接到轴分子末端的单一取代吡啶基团调节α-CD通过它们的速率。两个甲基取代基可以控制a-CD与客体分子和Resu…的络合程度更多的是由于Cd分子进入轴端的面方向的区别。将α-CDs定向排列在轴分子的两个基团上，合成了不同链长的聚乙二醇单取代的CDS。利用α-CD的分子识别作用，我们成功地构建了α-CD、十二烷基修饰的聚(丙烯酸)和4，4‘-偶氮二苯甲酸的光响应性水凝胶体系。通过重复的紫外光和可见光的照射，凝胶到溶胶和溶胶到凝胶的转变反复发生。较少

1.Construction of Supramolecular PolymersWhen a guest part was covalently attached to cyclodextrin (CD), they formed supramolecular dimers, a cyclic daisy chain, supramolecular oligomers, and polymers. t-Boc-cinnamamide-α-CD was found to form chiral supramolecular polymers in aqueous solutions. Supramolecular poly[2]rotaxane polymers and supramolecular α-, β-CD copolymers were obtained.2.Dymanics of Supramolecular PolymersWe investigated a new one-pot method to prepare polyrotaxanes containing γ-CDs by the photocyclodimerization reactions of 9-anthryl groups at the ends of the polymer chain in the presence of γ-CDs.We have constructed pseudo-rotaxanes of α-CD with axle molecules bearing pyridyl end caps via kinetic control of threading of α-CD onto axle molecules. A single substituted pyridyl group attached to the ends of the axle molecule regulated the rate for α-CD passing them. Two methyl substituents could govern the degree of complex formation of a-CD with guest molecules and resu … More lted in the distinction of face direction of CD molecules entering the axle ends. α-CDs were arranged in one direction at two station units of the axle molecule.Poly(ethylene glycol) (PEG)-substituted CDs with different chain lengths have been synthesized. PEG-substituted CDs formed self-threading complexes in aqueous solutions, and the conformational exchange dynamics between self-threading and dethreading could be regulated by its chain length.3.Polymerization of lactonesCDs were found to initiate ring-opening polymerization of some cyclic esters selectively to give a polyester with a CD at the chain end.4.Gel-to-Sol and Sol-to-Gel TransitionsUsing molecular recognition of α-CD, we have successfully constructed a photoresponsive hydrogel system by combination of simple components, α-CD, dodecyl-modified poly(acrylic acid), and a photoresponsive competitive guest, 4,4'-azodibenzoic acid. Gel-to-sol and sol-to-gel transitions occurred repeatedly by repetitive irradiations of UV and visible light. Less