Palladium(0) nanoparticles stabilized by phosphorus dendrimers containing coordinating 15-membered triolefinic macrocycles in periphery

被引:80
作者
Badetti, Elena [2 ]
Caminade, Anne-Marie [1 ]
Majoral, Jean-Pierre [1 ]
Moreno-Manas, Marcial [2 ]
Sebastian, Rosa M. [2 ]
机构
[1] CNRS, Chim Coordinat Lab, LCC, F-31077 Toulouse 04, France
[2] Univ Autonoma Barcelona, Dept Chem, E-08193 Barcelona, Spain
关键词
D O I
10.1021/la7013418
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A new family of phosphorus dendrimers containing on their surfaces 3, 6, 12, and 96 15-membered azamacrocycles has been synthesized. The coordinating ability of these macrocycles to palladium(0) atoms allowed the preparation of new dendrimers of several generations containing.the corresponding metal complexes and several new nanoparticulated materials, where nanoparticles are stabilized mainly by the complexed dendrimers of the zero, first, and fourth generations. No reduction process of palladium(II) salts was needed to prepare nanoparticles of 2.5-7.9 nm diameter. All the new compounds and materials have been characterized by NMR, IR, elemental analysis and/or matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF) spectrometry, high-resolution transmission electron microscopy, and electron diffraction. Also UV-vis spectra were obtained. The Mizoroki-Heck reaction has been catalyzed in a homogeneous and heterogeneous manner by using four different materials; in all cases, the catalyst could be recovered and reused several times.
引用
收藏
页码:2090 / 2101
页数:12
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