摘要超分子聚合物是由单体通过非共价相互作用，如氢键、金属配位、主-客体相互作用等连接形成的。基于主客体相互作用和金属配位作用，我们构建了不同拓扑结构的超分子聚合物。我们设计合成一端含二季铵盐，另一端含BIP基团的主体分子H1和两端含冠醚接团的客体分子G1。混合主体分子H1和客体分子G1就可得到二聚体2。紧接着，在二聚体2中加入Eu(NO3)3（3％摩尔每配体），将自组装成超分子三官能单元，这将作为交联部分。再将Zn(NO3)2（97％摩尔每配体）加入到该混合物中，便能得到超支化超分子聚合物6。而如果将Zn(NO3)2100%摩尔加入到二聚体2中，将得到线型超分子聚合物5。但是，如果在形成线型超分子聚合物后再加入Eu(NO3)3，将不能形成超支化超分子聚合物。这主要是由于BIP单元和Eu3+之间作用较弱，它不能取代Zn2+和BIP之间更为强烈的结合。并且由于以上过程都是可逆的，从而可以实现超分子聚合物在单体、线型和超支化聚合物这三种拓扑结构之间的可逆转化，进而达到轻易地控制超分子聚合物性能的目的。71276
毕业论文关键词：主客体作用;金属配位作用;超支化超分子聚合物;线性超分子聚合物
Abstract Supramolecular polymers are formed by connecting monomers through non-covalent interactions, such as hydrogen bonding, metal coordination, and host-guest interactions. Based on orthogonal host-guest interactions and metal coordination, we report the preparation of suparmolecular polymers with different architectures. We designed and prepared monomer H1, which contains a BIP unit at one end and a secondary ammonium salt (DBAS) at the other, and monomer G1, which consists of two symmetrical benzo-24-crown-8 (DB24C8) units. Mixing monomer H1 and G1 together is anticipated to afford the dimeric complex 2 through host-guest interaction. Upon addition of Eu(NO3)3 (3 mol% per ligand) to a large excess of complex 2 should result in the self-assembly of supramolecular tri-functional unit, which will act as a crosslinking moiety. Finally, when Zn(NO3)2 (97 mol% per ligand) is added to the mixture, hyperbranched supramolecular polymer 6 was obtained. When Zn(NO3)2 (100 mol% per ligand) is added directly to complex 2, the linear supramolecular polymer 5 was obtained. However, addition of Eu(NO3)3 after the formation of this linear supramolecelar polymer does not result in formation of the hyperbranched supramolecular polymer. This is mainly due to the weaker binding between BIP unit and EuⅢ ions, which can not displace the more strongly bound Znп ions. Furthermore, because of the above process is reversible, thereby enabling supramolecular polymer reversibly transformed between monomers, linear and hyperbranched polymers of these topologies, and thus reach easily control the supramolecular polymer properties of the object.
Key Words: host-guest interaction; metal–ligand coordination interactions; hyperbranched supramolecular; linear supramolecelar
目 录
中文摘要 Ⅱ
英文摘要 Ⅲ
1 引言 1
1.1基于主客体相互作用的超分子聚合物的概念 1
1.2基于冠醚及其衍生物的超分子聚合物 2
1.3基于环糊精及其衍生物的超分子聚合物 3
1.4基于杯芳烃及其衍生物的超分子聚合物 4
2 本论文的研究内容 6
2.1基本思路 利用不同金属配位作用构建线型和超支化超分子聚合物:http://www.youerw.com/cailiao/lunwen_80903.html