Copper-coordination polymer-controlled Cu@N-rGO and CuO@C nanoparticle formation: reusable green catalyst for A<sup>3</sup>-coupling and nitroarene-reduction reactions
作者:Vadivel Vinod Kumar、Rajamani Rajmohan、Pothiappan Vairaprakash、Mariappan Mariappan、Savarimuthu Philip Anthony
DOI:10.1039/c7dt02119d
日期:——
structural properties of coordination polymers (COPs), together with the huge variety of metal ions and organic linkers to choose from, make COPs potential precursors for fabricating carbon-encapsulated metal and metal oxide nanoparticles (NPs). Herein, we have studied the role of the COP structural assembly, prepared through making subtle changes to the ligand structure, on the formation of NPs in
配位聚合物(COP)令人着迷的结构特性,以及可供选择的多种金属离子和有机连接剂,使COPs成为制造碳封装的金属和金属氧化物纳米颗粒(NP)的潜在前体。本文中,我们研究了通过对配体结构进行细微变化而制备的COP结构组装对碳基质中NP形成的作用。使用不同的基于氨基酸的还原席夫碱酚类螯合配体生成的铜-COP(Cu-COP-1–Cu-COP-7)在固态下显示出具有不同结构组织的晶体结构。有趣的是,在330°C下煅烧Cu-COP-1和Cu-COP-5可产生纯CuNP,而Cu-COP-2,Cu-COP-3,Cu-COP-4和Cu-COP-7生成了被碳基质包裹的CuONP。Cu-COP-6的煅烧在碳基质中同时产生了CuNPs和CuONPs。通过PXRD和XPS研究明确证实了碳基质中CuNP和CuONP的形成。使用HR-TEM和FE-SEM分析了Cu / CuONP的大小和形态。BET研究表明,碳包裹的C