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Highly Active Pd Nanocatalysts Regulated by Biothiols for Suzuki Coupling Reaction
- Source :
- Catalysis Letters. 148:3325-3334
- Publication Year :
- 2018
- Publisher :
- Springer Science and Business Media LLC, 2018.
-
Abstract
- A series of biothiols involving N-acetyl-l-cysteine (NAC), penicillamine (PEN), homocysteine (Hcys) and cysteine (Cys), were employed as nucleation templates to synthesize Pd nanocatalysts for Suzuki coupling reaction. It is the first report to comparatively study the physicochemical properties of Pd nanoparticles synthesized by biothiols with different chemical structures. Through the characterizations of UV–Vis, FT-IR, TEM, XPS and HPLC, it is demonstrated that Pd(II) precursors can coordinate with biothiols mainly through thiol, amino/amido and carboxyl groups. NAC molecules are capable of generating uniform Pd nanoparticles with the size distribution from 2.2 to 3.3 nm. At the [PdCl42−]/[biothiol] of 6, NAC- and Hcys-stabilized Pd displays spherical particles with the average size of 3.3 and 3.6 nm respectively, whereas Cys- and PEN-capped Pd exhibit worm-like morphology with poor dispersion. NAC-capped Pd nanoparticles with the mean diameter of 3.3 nm and the Pd0 proportion of 63%, show highly active in Suzuki cross-coupling between iodobenzene and phenylboronic acid, with the turn over frequency (TOF) of 38625 mol biphenyl (mol Pd × h)−1 in EtOH/water = 1:2 at 60 °C. This work paves a promising way to construct highly active Pd nanocatalysts, with a facile modulation of the morphology, the particle size and the charge property via different biothiols. A series of biothiols were employed as nucleation templates to synthesize Pd nanocatalysts for Suzuki coupling reaction. This work paves a promising way to construct highly active Pd nanocatalysts, with a facile modulation of the morphology, the particle size and the charge property via different biothiols.
- Subjects :
- chemistry.chemical_classification
Iodobenzene
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Combinatorial chemistry
Catalysis
Nanomaterial-based catalyst
0104 chemical sciences
chemistry.chemical_compound
chemistry
Suzuki reaction
Thiol
Molecule
Particle size
Phenylboronic acid
0210 nano-technology
Subjects
Details
- ISSN :
- 1572879X and 1011372X
- Volume :
- 148
- Database :
- OpenAIRE
- Journal :
- Catalysis Letters
- Accession number :
- edsair.doi...........40d343caaec56006b9872b63e27978d1