Nonequilibrium Nuclear Spin States of Ethylene during Acetylene Hydrogenation with Parahydrogen over Immobilized Iridium Complexes

被引：3
|
作者：
Skovpin, I. V. [1 ]
Sviyazov, S. V. [1 ,2 ]
Burueva, D. B. [1 ]
Kovtunova, L. M. [1 ,3 ]
Nartova, A. V. [3 ]
Kvon, R. I. [3 ]
Bukhtiyarov, V. I. [3 ]
Koptyug, I. V. [1 ]
机构：
[1] Russian Acad Sci, Int Tomog Ctr, Siberian Branch, Novosibirsk 630090, Russia
[2] Novosibirsk State Univ, Novosibirsk 630090, Russia
[3] Russian Acad Sci, Siberian Branch, Boreskov Inst Catalysis, Novosibirsk 630090, Russia
来源：
DOKLADY PHYSICAL CHEMISTRY | 2023年 / 512卷 / 02期
关键词：
hyperpolarization; parahydrogen; parahydrogen-induced nuclear polarization; NMR; heterogeneous catalysis; immobilized complexes; XPS selective hydrogenation; ethylene; INDUCED POLARIZATION; HETEROGENEOUS HYDROGENATION; ISOMERS; SILICA; SPECTROSCOPY; CONVERSION; MECHANISM; CATALYST;
D O I：
10.1134/S0012501623600237
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Immobilized rhodium and iridium complexes have been prepared and characterized by X-ray photoelectron spectroscopy. For the first time, hyperpolarized 13C-ethylene was detected directly in the gas phase during acetylene hydrogenation with parahydrogen over immobilized iridium complexes. The line shape of polarized 13C-ethylene unambiguously indicates that the hydrogen addition to the triple bond of acetylene over immobilized iridium complexes proceeds stereoselectively via syn-addition. It has been shown that the selective acetylene hydrogenation with parahydrogen over immobilized iridium complexes is an efficient chemical method for enriching the nuclear spin isomers of ethylene.
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收藏
页码：149 / 157
页数：9
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