Ultra-small cobalt nanoparticles from molecularly-defined Co–salen complexes for catalytic synthesis of amines
作者:Thirusangumurugan Senthamarai、Vishwas G. Chandrashekhar、Manoj B. Gawande、Narayana V. Kalevaru、Radek Zbořil、Paul C. J. Kamer、Rajenahally V. Jagadeesh、Matthias Beller
DOI:10.1039/c9sc04963k
日期:——
situ generated cobalt nanoparticles from molecularly defined complexes as efficient and selective catalysts for reductive amination reactions. In the presence of ammonia and hydrogen, cobalt–salen complexes such as cobalt(II)–N,N′-bis(salicylidene)-1,2-phenylenediamine produce ultra-small (2–4 nm) cobalt-nanoparticles embedded in a carbon–nitrogen framework. The resulting materials constitute stable,
我们报告从分子定义的复合物为还原胺化反应的有效和选择性催化剂原位生成钴纳米粒子的合成。在存在氨和氢的情况下,钴-salen络合物,例如钴(II)-N,N'-双(水杨基亚烷基)-1,2-苯二胺产生嵌入碳-氮骨架中的超小(2-4 nm)钴纳米颗粒。所得的材料构成稳定的,可重复使用的和磁性可分离的催化剂,其使得能够由羰基化合物和氨合成直链和支链的苄基,杂环和脂族伯胺。分离的纳米颗粒还代表了用于合成伯胺,仲胺和叔胺(包括生物学上相关的N-甲基胺)的出色催化剂。