Direct observation of catalytically active species in reaction solution by X-ray absorption spectroscopy (XAS)

被引：6

作者：

Nomura, Kotohiro ^{[1
]}

Mitsudome, Takato ^{[2
]}

Yamazoe, Seiji ^{[1
]}

机构：

[1] Tokyo Metropolitan Univ, Dept Chem, Hachioji, Tokyo 1920397, Japan

[2] Osaka Univ, Dept Mat Engn Sci, Toyonaka, Osaka 5608531, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2019年 / 58卷 / 10期

关键词：

(IMIDO)VANADIUM(V) DICHLORIDE COMPLEXES; N-HETEROCYCLIC CARBENES; STRUCTURAL-ANALYSIS; METAL-COMPOUNDS; AL COCATALYST; ZIEGLER-NATTA; ETHYLENE; POLYMERIZATION; LIGANDS; DIMERIZATION;

D O I：

10.7567/1347-4065/ab3e5c

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Solution V, Nb K-edge XANES (X-ray absorption near edge structure) analysis of molecular catalysis, high oxidation state vanadium(V), niobium(V) complexes containing both imido ligands (possessing metal-nitrogen double bond, NR) and mono anionic ancillary donor ligands (L) of type, M(NR)(L)X-2 (X = Cl, Me), which catalyze ethylene dimerization/polymerization in the presence of Al cocatalysts, has been explored. The analysis method is highly useful to obtain the direct information of the active species (oxidation state, basic framework around the centered metal) in solution (in situ), and should thus become a powerful tool for better understanding the catalysis mechanism, basic coordination and organometallic chemistry. (C) 2019 The Japan Society of Applied Physics

引用

页数：9

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