pH-Controlled selective synthesis of lactate from pyruvate with a photoredox system of water-soluble zinc porphyrin, an electron mediator and platinum nanoparticles dispersed by polyvinylpyrrolidone
| Autor: | Yu Kita, Yutaka Amao |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Polyvinylpyrrolidone
Renewable Energy Sustainability and the Environment Hydride Energy Engineering and Power Technology Platinum nanoparticles Photochemistry Biodegradable polymer Catalysis chemistry.chemical_compound Fuel Technology chemistry Triethanolamine medicine Water splitting Organic synthesis medicine.drug |
| Zdroj: | Sustainable Energy & Fuels. 5:6004-6013 |
| ISSN: | 2398-4902 |
| Popis: | Photoredox catalytic systems are attracting widespread attention not only in the fields of water splitting into hydrogen and oxygen or CO2 reduction, but also in the field of organic synthesis for sustainable chemical such as biodegradable polymer and its raw material. As an example of the development of the photoredox catalyst system for organic synthesis, the visible-light driven selective pyruvate reduction to lactate (raw material for biodegradable polymer) with the system of triethanolamine (TEOA), zinc tetraphenylporphyrin tetrasulfonate (ZnTPPS), methylviologen (MV2+) and colloidal platinum nanoparticles dispersed polyvinylpyrrolidone (Pt-PVP) has been reported previously. In this work, improvement for visible-light driven selective lactate synthesis with this system was attempted by tuning an electron mediator or controlling the pH. The radical cation species is expected to be more effective in reducing pyruvate to lactate than hydride species in this system. From the result for pH controlling experimental, it was found that the protonated TEOA (TEOAH+) is strongly involved in the pyruvate reduction to lactate with this system under steady-state irradiation. Moreover, the racemic lactate was synthesized in this system. |
| Databáze: | OpenAIRE |
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