NaBr-Assisted Photoelectrochemical and Photochemical Integrated Process for Isomerization of Maleate Esters to Fumarate Esters
| Autor: | Hitoshi Kusama, Hiroyuki Tateno, Shih-Yuan Chen, Kazuhiro Sayama, Takehisa Mochizuki, Yugo Miseki |
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| Rok vydání: | 2021 |
| Předmět: |
Photoelectrochemical oxidation
Photoisomerization Dimethyl fumarate Renewable Energy Sustainability and the Environment Chemistry General Chemical Engineering Quantum yield Dimethyl maleate 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry Electrochemistry 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Photocatalysis Environmental Chemistry 0210 nano-technology Isomerization |
| Zdroj: | ACS Sustainable Chemistry & Engineering. 9:6886-6893 |
| ISSN: | 2168-0485 |
| Popis: | We developed a NaBr-assisted photoelectrochemical and photochemical integrated process for the complete isomerization of dimethyl maleate to dimethyl fumarate under solar-simulated light irradiation. This process also produced bulky fumarate ester derivatives at high yields (85–100%). A plausible mechanism of the bromine-initiated radical chain reaction was suggested by the results of the experimental data and density function theory calculations. The photoelectrochemical oxidation of NaBr generated the oxidized bromine species, which were then photolyzed to produce the bromine radical initiators induced by the photochemical process. This resulted in the high faradaic efficiency (98%) in the photoelectrochemical step and internal quantum yield (>100%) in the photoisomerization step. This newly developed process is an innovative and environmentally friendly strategy that goes beyond the conventional thermochemical process to achieve the precise synthesis of fumarate derivatives under mild conditions. |
| Databáze: | OpenAIRE |
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