Mass spectrometric assay of polymerization catalysts for combinational screening
Mass spectrometric assay of polymerization catalysts for combinational screening
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DOI：
10.1016/s1387-3806(99)00229-8
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发表时间：
2000-01-21
影响因子：
1.8
通讯作者：
Chen, P
中科院分区：
文献类型：
--
作者：
Hinderling, C;Chen, P
由Pd（II）二亚胺络合物催化的均相齐格勒-纳塔聚合的电喷雾电离质谱显示了两个不同的分布的金属结合的低聚离子对应的催化中心没有经历链转移和那些。通过描述聚合反应的动力学方程的数值积分的两个分布的拟合给出了聚合反应中的引发、传播和链转移的绝对速率，由此可以预测本体聚合物的性质。质谱法需要mg量的催化剂，仅需要几分钟，并且适用于催化剂库的合并和平行筛选。(C)2000 Elsevier Science B.V.
Electrospray ionization mass spectrometry of a homogeneous Ziegler-Natta polymerization catalyzed by a Pd(II) diimine complex shows two distinct distributions of metal-bound oligomeric ions corresponding to catalytic centers which have not undergone chain transfer and those that have. A fit of two distributions by numerical integration of the kinetic equations describing the polymerization gives the absolute rates for initiation, propagation, and chain transfer in the polymerization reaction, from which the bulk polymer properties can be predicted. The mass spectrometric method requires mg quantities of catalyst, requires only a few minutes, and is suitable for both pooled and parallel screens of catalyst libraries. (C) 2000 Elsevier Science B.V.