Preparation and catalytic properties of organic porous materials containing metal centers
Xu, Tongzhou (2022)
2022
All rights reserved. This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2022060716157
https://urn.fi/URN:NBN:fi:amk-2022060716157
Tiivistelmä
Currently, the catalysts are playing a significant role in the chemical industry and laboratory research. Traditional metal homogenous catalysts have certain limitations such as environmental problems, low catalytic selectivity, stability and recyclability. Therefore, developing a high catalytic efficiency, high chemical stability, and recyclable catalysts materials is in top urgence. Organic porous materials containing metal center catalysts attracts a lot of interests due to its excellent properties. Covalent organic framework (COF) as one of the most potential POPs materials, has a certain prospect in the field of catalysis because of open pores, high porosity, and designable structure.
In this thesis, a TpBpy-COF was successfully synthesized by using monomers 1,3,5-triformylphloroglucinol and 2,2'-bipyridyl-5,5'-diamine through condensation reaction. Based on synthesized TpBpy-COF, PdCl2 was used to introduce into the COF by using a post-modification method, and then Pd-TpBpy-COF was obtained. The surface area of synthesized COF was determined by using N2 adsorption and desorption curve, which showed the specific surface area was 470 and 259 m2/g respectively for before and after modification. Also, other characterizations such as SEM image, XPS test, and XRD test were done to prove the COF structure was constructed. And the catalytic performance of synthesized Pd-TpBpy-COF was researched by monitoring the catalytic results of two typical Suzuki coupling reactions. By comparing with several research literature, the experiment results showed that the synthesized Pd-TpBpy-COF gave a wonderful catalytic performance for aryl halide coupling with phenylboronic acid, presenting in more generous condition such as reacting in ambient atmosphere, lower reaction temperature, and less amount needs of catalyst.
In this thesis, a TpBpy-COF was successfully synthesized by using monomers 1,3,5-triformylphloroglucinol and 2,2'-bipyridyl-5,5'-diamine through condensation reaction. Based on synthesized TpBpy-COF, PdCl2 was used to introduce into the COF by using a post-modification method, and then Pd-TpBpy-COF was obtained. The surface area of synthesized COF was determined by using N2 adsorption and desorption curve, which showed the specific surface area was 470 and 259 m2/g respectively for before and after modification. Also, other characterizations such as SEM image, XPS test, and XRD test were done to prove the COF structure was constructed. And the catalytic performance of synthesized Pd-TpBpy-COF was researched by monitoring the catalytic results of two typical Suzuki coupling reactions. By comparing with several research literature, the experiment results showed that the synthesized Pd-TpBpy-COF gave a wonderful catalytic performance for aryl halide coupling with phenylboronic acid, presenting in more generous condition such as reacting in ambient atmosphere, lower reaction temperature, and less amount needs of catalyst.