pH-Responsive Ruthenium-Based Olefin Metathesis Catalysts: Controlled Ring-Opening Metathesis Polymerization in Alcoholic and Aqueous Media upon Acid Addition

被引：38
|
作者：
Dunbar, Miles A. [1 ]
Balof, Shawna L. [1 ]
Roberts, Adam N. [1 ]
Valente, Edward J. [2 ]
Schanz, Hans-Joerg [1 ]
机构：
[1] Univ So Mississippi, Dept Chem & Biochem, Hattiesburg, MS 39406 USA
[2] Univ Portland, Dept Chem, Portland, OR 97203 USA
来源：
ORGANOMETALLICS | 2011年 / 30卷 / 02期
关键词：
WATER; ROMP; BENZYLIDENE; INITIATORS;
D O I：
10.1021/om100633f
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The new hexacoordinate catalysts (PCy3)(DMAP)(2-) Cl2Ru=CH(p-C6H4)CH2NMe2 (7) and (PCy3)(DMAP)(2-)Cl2Ru=CH(p-C6H4)N(CH3)(2) (8) have been synthesized via exchange of a PCy3 ligand for two DMAP ligands from their (PCy3)(2)Ru precursors 4 and 5 in a one-step reaction in high yield. The catalysts promoted controlled ROMP of two cationic exo-7-oxanorbornene derivatives under homogeneous conditions in various acidic protic media, including acidic aqueous media. Very low polydispersities were accomplished in TFE/0.1 M HClaq. (1:1 v/v) with PDIs as low as 1.05.
引用
收藏
页码：199 / 203
页数：5
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