Designing an "a-ring-with-branches" polymer topology by electrostatic self-assembly and covalent fixation with interiorly functionalized telechelics having cyclic ammonium groups

Citation
H. Oike et al., Designing an "a-ring-with-branches" polymer topology by electrostatic self-assembly and covalent fixation with interiorly functionalized telechelics having cyclic ammonium groups, MACRO RAPID, 22(14), 2001, pp. 1128-1134
Citations number
28
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
MACROMOLECULAR RAPID COMMUNICATIONS
ISSN journal
10221336 → ACNP
Volume
22
Issue
14
Year of publication
2001
Pages
1128 - 1134
Database
ISI
SICI code
1022-1336(20010928)22:14<1128:DA"PTB>2.0.ZU;2-F
Abstract
A novel and unusual polymer topology, i.e. a-ring-with-two-branches, has be en constructed efficiently by making use of an interiorly functionalized po ly(tetrahydrofuran) (poly(THF)) having two pyrrolidinium groups. The dicarb oxylate counterion, i.e. terephthalate, was then introduced by an ion-excha nge reaction of the interiorly located pyrrolidinium group. Subsequent heat treatment under appropriate, dilution caused an efficient polymer cyclizat ion to produced an a-ring-with-two-branches polymer topology in high yield through the selective and quantitative ring-opening of the pyrrolidinium gr oups by the dicarboxylate counterion.