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XPS 及 FeO-PTMS-NAS@Cu 新型磁性天然沥青基网络与可回收纳米催化剂用于联苯类化合物合成的结构研究。

XPS and structural studies of FeO-PTMS-NAS@Cu as a novel magnetic natural asphalt base network and recoverable nanocatalyst for the synthesis of biaryl compounds.

机构信息

Department of Chemistry, Faculty of Basic Sciences, Ilam University, 69315-516, Ilam, Iran.

出版信息

Sci Rep. 2021 Dec 30;11(1):24508. doi: 10.1038/s41598-021-04111-z.

DOI:10.1038/s41598-021-04111-z
PMID:34969977
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8718525/
Abstract

In this research, natural asphalt as a mineral carbonuous material was converted to sodium natural asphalt sulfonate (Na-NAS) and, then, was linked to FeO MNPs in order to synthesize the magnetic nanocatalyst. Afterwards, Cupper (I) and Cu (II) was grafted on FeO-PTMS-NAS. Moreover, it is worth mentioning that the synthesized the novel magnetic nanocatalyst (FeO-PTMS-NAS@Cu) was successfully used in Suzuki and Stille coupling reactions. The FeO-PTMS-NAS@Cu MNPs were characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), thermogravimetric analysis (TGA), vibrating sample magnetometry (VSM), inductively coupled plasma (ICP), BET and X-ray photoelectron spectroscopy (XPS) analysis. Besides, sulfonation of natural asphalt, magnetization of catalyst, grafting of Cu (I) and Cu (II) to NAS and catalyst formation were investigated and proved carefully. This nanocatalyst can be comfortably separated from the reaction medium through an external magnetic field and can also be recovered and reused, while maintaining its catalytic activity.

摘要

在这项研究中，天然沥青作为一种矿物碳质材料，被转化为天然沥青磺酸钠（Na-NAS），然后与 FeO MNPs 结合，以合成磁性纳米催化剂。随后，将铜（I）和铜（II）接枝到 FeO-PTMS-NAS 上。此外，值得一提的是，合成的新型磁性纳米催化剂（FeO-PTMS-NAS@Cu）成功地用于 Suzuki 和 Stille 偶联反应。FeO-PTMS-NAS@Cu MNPs 采用傅里叶变换红外光谱（FT-IR）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、能谱（EDX）、X 射线衍射（XRD）、热重分析（TGA）、振动样品磁强计（VSM）、电感耦合等离子体（ICP）、BET 和 X 射线光电子能谱（XPS）分析进行了表征。此外，还仔细研究和证明了天然沥青的磺化、催化剂的磁化、Cu（I）和 Cu（II）接枝到 NAS 以及催化剂形成。这种纳米催化剂可以通过外部磁场轻松地从反应介质中分离出来，并且可以回收和重复使用，同时保持其催化活性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3ac5/8718525/b6a20a9e8f1f/41598_2021_4111_Fig9_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3ac5/8718525/b0530cd0e439/41598_2021_4111_Sch1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3ac5/8718525/c14283850c39/41598_2021_4111_Sch2_HTML.jpg
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