Functionalization of Supramolecular Polymers

超分子聚合物的官能化

基本信息

批准号：
14103015
负责人：
HARADA Akira
金额：
$ 73.38万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (S)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2006
项目状态：
已结题

项目摘要

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

1.超分子聚合物的构建当客体部分与环糊精（CD）共价连接时，它们形成超分子二聚体、环状菊链、超分子低聚物和聚合物，发现t-Boc-肉桂酰胺-α-CD形成手性超分子聚合物。超分子聚[2]轮烷聚合物和超分子α-， 2.超分子聚合物动力学研究了一种新的一锅法，通过在γ-CDs存在下，通过聚合物链末端9-蒽基的光环二聚反应制备含γ-CDs的聚轮烷。 .我们通过将α-CD穿入其上的动力学控制，构建了具有带有吡啶基端盖的轴分子的α-CD的假轮烷连接到轴分子末端的单个取代的吡啶基调节 α-CD 通过它们的速率，两个甲基取代基可以控制 α-CD 与客体分子形成复合物的程度，并导致。进入轴端的CD分子面方向的区别在轴分子的两个站单元处沿一个方向排列。聚乙二醇(PEG)取代的CDs。已经合成了不同链长的PEG取代的CDs，在水溶液中形成自穿线复合物，并且自穿线和脱线之间的构象交换动力学可以通过其链长来调节。 3.内酯CDs的聚合被发现可以引发环化。一些环酯选择性开环聚合，得到链端带有CD的聚酯。4.凝胶到溶胶和溶胶到凝胶利用α-CD的分子识别，我们通过简单组分α-CD、十二烷基改性聚丙烯酸和光响应竞争客体4,4'-偶氮二苯甲酸的组合成功构建了光响应水凝胶系统。通过紫外线和可见光的重复照射，反复发生溶胶到凝胶和溶胶到凝胶的转变。

项目成果

期刊论文数量（185）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Polymerizations of cyclic esters catalyzed by titanium complexes having chalcogen-bridged chelating diaryloxo ligands

DOI：
10.1021/ma0204711
发表时间：
2002-08
期刊：
Macromolecules
影响因子：
5.5
作者：
Y. Takashima;Y. Nakayama;Kouji Watanabe;Tetsuya Itono;N. Ueyama;A. Nakamura;and Hajime Yasuda;A. Harada;J. Okuda
通讯作者：
Y. Takashima;Y. Nakayama;Kouji Watanabe;Tetsuya Itono;N. Ueyama;A. Nakamura;and Hajime Yasuda;A. Harada;J. Okuda

Contraction of Supramolecular Double-Threaded Dimer Formed by α-Cyclodextrin with a Long Alkyl Chain

长烷基链α-环糊精形成的超分子双线二聚体的收缩