Seed-Mediated Synthesis of Palladium Nanorods and Branched Nanocrystals and Their Use as Recyclable Suzuki Coupling Reaction Catalysts

被引:236
作者
Chen, Yi-Hsiu [1 ]
Hung, Hsiao-Hui [1 ]
Huang, Michael H. [1 ]
机构
[1] Natl Tsing Hua Univ, Dept Chem, Hsinchu 30013, Taiwan
关键词
HIGH-YIELD SYNTHESIS; RATIO GOLD NANORODS; AQUEOUS-SOLUTION; METAL NANOPARTICLES; PD NANOPARTICLES; GROWTH; BIPYRAMIDS; NANOCUBES;
D O I
10.1021/ja903305d
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
In this study, we have used a simple seed-mediated synthesis process to prepare uniform Pd nanorods with average lengths of similar to 200 and 300 nm through the addition of 50-100 mu L of 0.004 M copper acetate solution into the growth solution for the first time. Because of their long lengths, they nicely settled to the bottom of the reaction vial and can easily be separated from the suspended faceted particles. The nanorods have an average diameter of similar to 20 nm, so they have high aspect ratios of 10-15 or more. They can readily self-assemble into high-density packing structures on substrates. By increasing the volume of the copper acetate solution added to 250, mu L, extensively branched Pd nanocrystals were obtained. The crystal structures of both particle morphologies have been examined. The nanorods possess a penta-twinned structure. Different growth directions have been found for the branched nanocrystals. The growth mechanism of these nanostructures was studied in great detail. A mixture of short Pd rods and faceted particles was formed first and elongated into long rods or branched nanocrystals with the assistance of copper atom deposition. A reduction potential of copper lower than that of palladium leads to periodic deposition and reoxidation of copper atoms on the growing rods and faceted particles. Use of other metal ions did not form long nanorods and branched nanocrystals. UV-vis spectra of the 200 nm Pd nanorods showed a significant absorption band in the near-infrared region with band maximum at similar to 1800 nm, while the 300 nm rods have band maxima of 2000-2100 nm. Both the nanorods and branched nanocrystals were found to serve as highly efficient and recyclable catalysts for catalyzing a Suzuki coupling reaction between phenylboronic acid and ioclobenzene. They are also thermally stable under the reflux condition and can be easily removed from the product solution. These novel Pd nanostructures should find use in other palladium-catalyzed reactions.
引用
收藏
页码:9114 / 9121
页数:8
相关论文
共 25 条
[1]   Palladium nanoparticles as efficient green homogeneous and heterogeneous carbon-carbon coupling precatalysts: A unifying view [J].
Astruc, Didier .
INORGANIC CHEMISTRY, 2007, 46 (06) :1884-1894
[2]   Seed-mediated synthesis of Pd nanocrystals: Factors influencing a kinetic- or thermodynamic-controlled growth regime [J].
Berhault, Gilles ;
Bausach, Marta ;
Bisson, Laure ;
Becerra, Loic ;
Thomazeau, Cecile ;
Uzio, Denis .
JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (16) :5915-5925
[3]   Microwave- and ultrasound-assisted Suzuki-Miyaura cross-coupling reactions catalyzed by Pd/PVP [J].
de Souza, Andrea Luzia F. ;
da Silva, Lucyane C. ;
Oliveira, Blanca L. ;
Antunes, O. A. C. .
TETRAHEDRON LETTERS, 2008, 49 (24) :3895-3898
[4]   An Effective Strategy for Room-Temperature Synthesis of Single-Crystalline Palladium Nanocubes and Nanodendrites in Aqueous Solution [J].
Fan, Feng-Ru ;
Attia, Adel ;
Sur, Ujjal Kumar ;
Chen, Jian-Bin ;
Xie, Zhao-Xiong ;
Li, Jian-Feng ;
Ren, Bin ;
Tian, Zhong-Qun .
CRYSTAL GROWTH & DESIGN, 2009, 9 (05) :2335-2340
[5]   One-Pot, High-Yield Synthesis of 5-Fold Twinned Pd Nanowires and Nanorods [J].
Huang, Xiaoqing ;
Zheng, Nanfeng .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2009, 131 (13) :4602-+
[6]   Growth and form of gold nanorods prepared by seed-mediated, surfactant-directed synthesis [J].
Johnson, CJ ;
Dujardin, E ;
Davis, SA ;
Murphy, CJ ;
Mann, S .
JOURNAL OF MATERIALS CHEMISTRY, 2002, 12 (06) :1765-1770
[7]   Fabrication of hollow palladium spheres and their successful application to the recyclable heterogeneous catalyst for Suzuki coupling reactions [J].
Kim, SW ;
Kim, M ;
Lee, WY ;
Hyeon, T .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (26) :7642-7643
[8]   Suzuki cross-coupling reactions catalyzed by palladium nanoparticles in aqueous solution [J].
Li, Y ;
Hong, XM ;
Collard, DM ;
El-Sayed, MA .
ORGANIC LETTERS, 2000, 2 (15) :2385-2388
[9]   Size effects of PVP-Pd nanoparticles on the catalytic Suzuki reactions in aqueous solution [J].
Li, Y ;
Boone, E ;
El-Sayed, MA .
LANGMUIR, 2002, 18 (12) :4921-4925
[10]   Shape-Controlled Synthesis of Pd Nanocrystals in Aqueous Solutions [J].
Lim, Byungkwon ;
Jiang, Mojiong ;
Tao, Jing ;
Camargo, Pedro H. C. ;
Zhu, Yimei ;
Xia, Younan .
ADVANCED FUNCTIONAL MATERIALS, 2009, 19 (02) :189-200