Well-defined acetylene-functionalized oxanorbornene polymers and block copolymers

被引：46

作者：

Al-Badri, Zoha M. ^{[1
]}

Tew, Gregory N. ^{[1
]}

机构：

[1] Univ Massachusetts, Dept Polymer Sci & Engn, Amherst, MA 01003 USA

来源：

MACROMOLECULES | 2008年 / 41卷 / 12期

关键词：

D O I：

10.1021/ma8004179

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Well-defined and high molecular weight acetylene-functionalized poly(oxanorbornenes) were synthesized using ring-opening metathesis polymerization (ROMP) of cobalt-functionalized exo-oxanorbornene monomer 2a. Dicobalt hexacarbonyl, Co-2(CO)(6), was used as a protecting group for the acetylene moiety. This protecting group was found to be compatible with third-generation Grubbs' catalyst, offering well-defined homopolymers and block copolymers in high yields (up to 97%). Equally important, it was removed (>99%) by treating the polymers with ceric(IV) ammonium nitrate (CAN), under mild conditions, with no observable unwanted side reactions. This approach yields high fidelity polymers containing the acetylene functionality which is incompatible with Ru-based catalysis. The explosion of click chemistry makes these polymers attractive starting macromolecules for postpolymerization chemistry.

引用

页码：4173 / 4179

页数：7

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