Greater than the Sum of Its Parts: A Heterodinuclear Polymerization Catalyst
Greater than the Sum of Its Parts: A Heterodinuclear Polymerization Catalyst
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DOI：
10.1021/jacs.5b09913
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发表时间：
2015-12-09
影响因子：
15
通讯作者：
Williams, Charlotte K.
中科院分区：
文献类型：
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作者：
Garden, Jennifer A.;Saini, Prabhjot K.;Williams, Charlotte K.
同双核催化剂在环氧化物和二氧化碳/酸酐共聚反应中有很好的先例;相反，迄今为止纯异双核催化剂是未知的。报道了一种对称大环配体配位的锌（II）/镁（II）杂环配合物的合成和性质。与同双核类似物或它们的任何组合相比，它显示出高聚合选择性、控制性和显著更大的活性。事实上，与同双核配合物的50：50混合物相比，它显示出5倍（CO2/环氧化物）或40倍（酸酐/环氧化物）的活性。
Homodinuclear catalysts have good precedent for epoxide and carbon dioxide/anhydride copolymerizations; in contrast, so far pure heterodinuclear catalysts are unknown. The synthesis and properties of a heterodinudear Zn(II)/Mg(II) complex coordinated by a symmetrical macrocydic ligand are reported. It shows high polymerization selectivity, control, and significantly greater activity compared to either of the homodinuclear analogues or any combinations of them. Indeed, compared to a 50:50 mixture of the homodinuclear complexes, it shows 5 times (CO2/epoxide) or 40 times (anhydride/epoxide) greater activity.