Boydston Andrew J, Williams Kyle A, Bielawski Christopher W
Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, Texas 78712, USA.
J Am Chem Soc. 2005 Sep 14;127(36):12496-7. doi: 10.1021/ja054029k.
A highly efficient route to a new class of organometallic polymers containing difunctional N-heterocyclic carbenes has been developed. Bis(imidazolium) halides and divalent group X metals were copolymerized to afford organometallic polymers in up to quantitative yields and with molecular weights up to 10(6) Da, depending on the structure of the N-heterocyclic carbene and the incorporated transition metal. Enhanced solubilities were demonstrated through post-polymerization ligation with phosphines. Finally, selective end-group functionalization and excellent molecular weight control was achieved through the inclusion of monofunctional chain transfer agents during the polymerization.
已开发出一种高效合成含双官能团氮杂环卡宾的新型有机金属聚合物的方法。双（咪唑鎓）卤化物与二价X族金属共聚，可得到产率高达定量且分子量高达10⁶Da的有机金属聚合物，这取决于氮杂环卡宾的结构和引入的过渡金属。通过与膦进行后聚合连接，证明了溶解性的增强。最后，通过在聚合过程中加入单官能链转移剂，实现了选择性端基官能化和出色的分子量控制。
