Chiral Pt/ZrO2 Catalysts. Enantioselective Hydrogenation of 1-phenyl-1,2-propanedione

被引：5
|
作者：
Urbina, Claudia [1 ]
Campos, Cristian [1 ]
Pecchi, Gina [1 ]
Claver, Carmen [2 ]
Reyes, Patricio [1 ]
机构：
[1] Univ Concepcion, Fac Ciencias Quim, Concepcion, Chile
[2] Univ Rovira & Virgili, Dept Quim Fis & Inorgan, Tarragona 43007, Spain
来源：
MOLECULES | 2010年 / 15卷 / 05期
关键词：
colloidal platinum; mesostructured ZrO2; enantioselective hydrogenation; chiral modifier; ENANTIO-SELECTIVE HYDROGENATION; ETHYL PYRUVATE; COLLOIDAL PLATINUM; COPOLYMERIZATION; NANOPARTICLES; SOLVENTS; CARBON;
D O I：
10.3390/molecules15053428
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The enantioselective hydrogenation of 1-phenyl-1,2-propanedione over Pt colloids stabilized with (R,S)-4,5-dihydro-4,5-diphenyl-2-(6-cyanopyridinyl)imidazoline (CI) supported on a meso-structured ZrO2 under a pressure of 40 bar of H-2 at 298 K has been investigated. The metal loading in all catalysts was 1 wt%. The effect of the amount of chiral modifier on the metal particle size and on the catalytic behavior was analyzed. It was found that as the CI/Pt molar ratio increases from 2.5 to 3.5 the Pt crystal size decreases from 3.0 to 1.8 nm. All catalysts were very active in the studied reaction, with the most active one being the catalyst with smaller Pt particles, whereas the selectivity is higher in those catalysts with larger chiral modified Pt metal particles.
引用
收藏
页码：3428 / 3440
页数：13
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