Vanadium-based Ziegler-Natta: challenges, promises, problems
Vanadium-based Ziegler-Natta: challenges, promises, problems
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DOI：
10.1016/s0010-8545(02)00298-9
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发表时间：
2003-02-01
影响因子：
20.6
通讯作者：
Gambarotta, S
中科院分区：
文献类型：
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作者：
Gambarotta, S
从钒作为烯烃均聚和共聚催化剂的能力的角度对钒的化学进行了综述。一些钒催化剂进行无规和超无规共聚的独特能力使得这些物质特别适合弹性体制造，尽管它们的活性相当低。为了评估影响活性的因素，我们合成了许多基于不同供体原子的单齿和多齿配体的钒配合物，并尝试分离催化活性中间体。在这篇综述中，研究了几种配体特征，它们影响金属氧化态的能力与钒-碳键的稳定性和催化活性有关。 (C) 2002 Elsevier Science B.V. 保留所有权利。
The chemistry of vanadium is reviewed in the view of the ability of this metal to act as a catalyst for olefin homo- and copolymerization. The unique ability of some vanadium catalysts to perform random and super-random copolymerization makes these species particularly desirable for elastomer manufacture in spite of their rather chronic low activity. In order to assess the factors that affect the activity, we have synthesized a number of vanadium complexes of mono- and polydentate ligands based on different donor atoms and attempted the isolation of catalytically active intermediates. In this review, several ligand features have been examined and their ability to affect the metal oxidation state has been related to the stability of the vanadium-carbon bond and catalytic activity. (C) 2002 Elsevier Science B.V. All rights reserved.