In situ PHIP NMR - a new tool to investigate hydrogenation mediated by colloidal catalysts

被引：22

作者：

Eichhorn, A ^{[1
]}

Koch, A ^{[1
]}

Bargon, J ^{[1
]}

机构：

[1] Univ Bonn, Inst Phys & Theoret Chem, D-53115 Bonn, Germany

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2001年 / 174卷 / 1-2期

关键词：

PHIP; colloid; catalysis; hydrogenation; parahydrogen; ethynylbenzene; styrene;

D O I：

10.1016/S1381-1169(01)00195-9

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：

It is known that some colloidal catalysts show "homogeneous"-like behavior, but it is unclear which parameters define the borderline between heterogeneous, i.e. surface reactions, and homogeneous-type catalysis of colloidal systems. The reaction of ethynylbenzene (phenylacetylene) with parahydrogen using the colloidal palladium catalyst Pd-x[(N(octyl)(4)Cl](y) leads to nuclear spin polarization in the hydrogenation products. Accordingly, the in situ NMR method parahydrogen induced polarization (PHIP) is an appropriate tool to investigate hydrogenation mediated by colloidal catalysts. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：293 / 295

页数：3

共 8 条

[1] ORTHOHYDROGEN AND PARAHYDROGEN INDUCED NUCLEAR-SPIN POLARIZATION [J].

BARGON, J ;

KANDELS, J ;

WOELK, K .

ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS, 1993, 180 :65-93

[2]

BARGON J, 2000, OXFORD RES MATTERS, V12

[3]

BARGON J, 1996, APPL HOMOGENEOUS CAT, V2, P672

[4] TRANSFORMATION OF SYMMETRIZATION ORDER TO NUCLEAR-SPIN MAGNETIZATION BY CHEMICAL-REACTION AND NUCLEAR-MAGNETIC-RESONANCE [J].

BOWERS, CR ;

WEITEKAMP, DP .

PHYSICAL REVIEW LETTERS, 1986, 57 (21) :2645-2648

[5] PARA-HYDROGEN AND SYNTHESIS ALLOW DRAMATICALLY ENHANCED NUCLEAR ALIGNMENT [J].

BOWERS, CR ;

WEITEKAMP, DP .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1987, 109 (18) :5541-5542

[6] Applications of the parahydrogen phenomenon: A chemical perspective [J].

Duckett, SB ;

Sleigh, CJ .

PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY, 1999, 34 (01) :71-92

[7]

EISENSCHMID TC, 1987, J AM CHEM SOC, V109, P8080

[8] Parahydrogen induced polarization [J].

Natterer, J ;

Bargon, J .

PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY, 1997, 31 :293-315

← 1 →