炔烃
化学选择性
乳酸
催化作用
纳米颗粒
化学
烯烃
选择性
钯
铜
二醇
有机化学
合金
高分子化学
无机化学
材料科学
纳米技术
细菌
生物
遗传学
作者
Werner Oberhauser,Marco Frediani,Iman Mohammadi Dehcheshmeh,Claudio Evangelisti,Lorenzo Poggini,Laura Capozzoli,Peyman Moghadam
出处
期刊:Chemcatchem
[Wiley]
日期:2022-02-24
卷期号:14 (8)
被引量:2
标识
DOI:10.1002/cctc.202101910
摘要
Polymer-supported PdCu alloy nanoparticles with a palladium to copper atom ratio of 1 have been synthesized upon: (i) Coordination of palladium/copper acetate to 2,2’-bipyridine-end functionalized poly(lactic acid) (PLA); (ii) Stereocomplexation of PLA-based macrocomplexes of opposite stereochemistry, and (iii) metal reduction with hydrogen. The obtained supported PdCu nanoparticles were successfully applied in the semi-hydrogenation of industrially important alkynols, such as 3-hexyn-1-ol and 2-butyne-1,4-diol leading to the corresponding cis-alkenol in high selectivity (98 %) under mild reaction conditions (i. e. ethanol, T (25 °C), p(H2)=3 bar) in the absence of any further additive. From a comparison of the catalytic performance of supported PdCu nanoparticles with those of Pd and Cu, located in the same chemical environment, emerged a clear alloy effect (i. e. high chemoselectivity for the alkene at high alkyne conversion). Recycling experiments conducted with the PdCu-based catalyst proved the stability of the catalyst with time, even by its recovering in air atmosphere.
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