Competitive hydrogenation/dehalogenation of halogenoarenes with surfactant-stabilized aqueous suspensions of rhodium and palladium colloids:: A major effect of the metal nature

被引:39
作者
Leger, Bastien
Nowicki, Audrey
Roucoux, Alain
Rolland, Jean-Paul
机构
[1] Ecole Natl Super Chim Rennes, CNRS, UMR 6226, Equipe Synth Orga & Syst Organises, F-35700 Rennes, France
[2] Univ Rennes 1, CNRS, UMR 6026, Equipe Struc & Dynam Macromol, F-35042 Rennes, France
关键词
hydrogenation; dehalogenation; colloids; rhodium; palladium;
D O I
10.1016/j.molcata.2006.11.004
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
The original palladium colloidal suspensions with an average size of 2.7 nm have been synthesised by reducing Na2PdCl4 with sodium borohydride and were stabilized by water soluble N,N-dimethyl-N-cetyl-N-(2-hydroxyethyl)ammonium chloride salt. The catalytic hydrogenation and dehalogenation of various halogenoarenes have been investigated with this aqueous suspension of palladium nanoparticles and compared with the well-known rhodium suspension. The influences of the halogen fragment and the experimental conditions have also been studied. It was observed that the kinetics and selectivity of the competitive dehalogenation/hydrogenation depend on the nature of metal colloids and the hydrogen pressure. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:221 / 225
页数:5
相关论文
共 31 条
[1]   Metal-mediated reductive hydrodehalogenation of organic halides [J].
Alonso, F ;
Beletskaya, IP ;
Yus, M .
CHEMICAL REVIEWS, 2002, 102 (11) :4009-4091
[2]  
[Anonymous], 2001, NANOSCALE MAT CHEM
[3]   Liquid-phase hydrodehalogenation of substituted chlorobenzenes over palladium supported catalysts [J].
Aramendía, MA ;
Boráu, V ;
García, IM ;
Jiménez, C ;
Marinas, A ;
Marinas, JM ;
Urbano, FJ .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2003, 43 (01) :71-79
[4]   Nanoparticles as recyclable catalysts: The frontier between homogeneous and heterogeneous catalysis [J].
Astruc, D ;
Lu, F ;
Aranzaes, JR .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2005, 44 (48) :7852-7872
[5]   Hydrogenation and dehalogenation of aryl chlorides and fluorides by the sol-gel entrapped RhC13,-Aliquat 336 ion pair catalyst [J].
Blum, J ;
Rosenfeld, A ;
Gelman, F ;
Schumann, H ;
Avnir, D .
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 1999, 146 (1-2) :117-122
[6]   Pd/C-catalyzed room-temperature hydrodehalogenation of aryl halides with hydrazine hydrochloride [J].
Cellier, PP ;
Spindler, JF ;
Taillefer, M ;
Cristau, HJ .
TETRAHEDRON LETTERS, 2003, 44 (38) :7191-7195
[7]  
Del Angel G, 2001, J MOL CATAL A-CHEM, V165, P9
[8]  
Dong YH, 2003, CHINESE CHEM LETT, V14, P368
[9]   Some interesting properties of metals confined in time and nanometer space of different shapes [J].
El-Sayed, MA .
ACCOUNTS OF CHEMICAL RESEARCH, 2001, 34 (04) :257-264
[10]  
Feldheim DL, 2002, METAL NANOPARTICLES: SYNTHESIS, CHARACTERIZATION, AND APPLICATIONS, P1