3495-36-1Relevant articles and documents
Chemisorption of carbon dioxide in carboxylate-functionalized ionic liquids: A mechanistic study
Yasaka, Yoshiro,Ueno, Masakatsu,Kimura, Yoshifumi
, p. 626 - 628 (2014)
Spectroscopic investigations on the CO2 chemisorption by tetra-n-butylphosphonium formate as an example of carboxylate- functionalized ionic liquids reveal that the formation of hydrogen-bond complexes such as diformate anion supplies the driving force of the chemisorption.
Visible-light photoredox-catalyzed selective carboxylation of C(sp3)?F bonds with CO2
Bo, Zhi-Yu,Chen, Lin,Gao, Tian-Yu,Jing, Ke,Lan, Yu,Liu, Shi-Han,Luo, Shu-Ping,Yan, Si-Shun,Yu, Bo,Yu, Da-Gang
supporting information, p. 3099 - 3113 (2021/11/16)
It is highly attractive and challenging to utilize carbon dioxide (CO2), because of its inertness, as a nontoxic and sustainable C1 source in the synthesis of valuable compounds. Here, we report a novel selective carboxylation of C(sp3)?F bonds with CO2 via visible-light photoredox catalysis. A variety of mono-, di-, and trifluoroalkylarenes as well as α,α-difluorocarboxylic esters and amides undergo such reactions to give important aryl acetic acids and α-fluorocarboxylic acids, including several drugs and analogs, under mild conditions. Notably, mechanistic studies and DFT calculations demonstrate the dual role of CO2 as an electron carrier and electrophile during this transformation. The fluorinated substrates would undergo single-electron reduction by electron-rich CO2 radical anions, which are generated in situ from CO2 via sequential hydride-transfer reduction and hydrogen-atom-transfer processes. We anticipate our finding to be a starting point for more challenging CO2 utilization with inert substrates, including lignin and other biomass.
CONVERSION OF CESIUM CARBONATE TO CESIUM OXALATE
-
Paragraph 0089, (2018/08/20)
Processes for producing a disubstituted oxalate are disclosed. The process includes contacting a cesium salt with one or more alcohols and carbon dioxide (CO2) under reaction conditions sufficient to produce a composition comprising a disubstituted oxalate.
Synthesis of zero-valent iron nanoparticles via laser ablation in a formate ionic liquid under atmospheric conditions
Okazoe, Shinya,Yasaka, Yoshiro,Kudo, Masaki,Maeno, Hiroshi,Murakami, Yasukazu,Kimura, Yoshifumi
supporting information, p. 7834 - 7837 (2018/07/25)
Transition metal nanoparticles (NPs) are promising materials for use as catalysts in many processes, although they are easily oxidized under ambient conditions. In this communication, a novel synthetic method is proposed for producing zero-valent iron (Fe) NPs by laser ablation under atmospheric conditions using the reducing properties of a formate-based ionic liquid solvent. The valence state of Fe was confirmed using X-ray absorption near edge structure (XANES) spectroscopy. The Fe NPs adopt a face centered cubic structure after synthesis, which gradually transforms to a body centered cubic structure after one month. The method can be extended to the synthesis of other transition metal NPs that are easily oxidized.