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بیست و نهمین کنفرانس شیمی آلی ایران
Valorization of CO2 catalyzed by nitrogen-rich covalent triazine framework
نویسندگان :
Mohadeseh Rashvand ( دانشگاه تحصیلات تکمیلی علوم پایه زنجان )
کلید واژه ها :
CO2 Fixation،Covalent Triazine Frameworks،nitrogen-rich،cyclic carbonate
چکیده مقاله :
The catalytic coupling of carbon dioxide (CO2) with epoxides to produce the cyclic carbonates which is extensively used as an important synthetic intermediate or apolar solvent, is considered one of the most important organic transformations.[1] However, this transformation practically needs a catalyst due to the inherent stability of CO2. Although hydrogen-bond-donor (HBD) catalysts in either homogeneous or supported forms have been extensively explored for various types of organic transformations, have been rarely investigated for direct coupling of carbon dioxide with epoxides. Covalent triazine frameworks have been attracting tremendous interest as promising heterogeneous catalysis for this kind of CO2 conversion.[2] We would like to report a nitrogen-rich CTF with diamino pyridine linkers with the combination of tetrabutylammonium iodide (TBAI) as a co-catalyst was found to reveal excellent activity and selectivity for the direct coupling of carbon dioxide with various types of terminal epoxides. It is believed that the described CTF architecture appears to capture CO2 while the hydrogen bonding site facilitates the ring opening of epoxide as the first step of the reaction.
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