Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 358, Issue -, Pages 368-373Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2017.09.045
Keywords
Bipyridinium salt; CO2 fixation; Malic enzyme; Malate production; Zinc porphyrin
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Funding
- Japan Society for the Promotion of Science [15K14239, 2406]
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Molecular conversion reaction system containing a dye and a biocatalyst catalyzing a reaction of a carbon-carbon bond formation from CO2 as a feedstock were constructed. For example, NADP-malic enzyme (ME, EC1.1.1.40) catalyzes the reaction of introducing CO2 as a carboxy group to pyruvate (C3 compound) to form malate (C4 compound) via oxaloacetate in the presence of natural co-enzyme NADPH. In a recent study, visible light-induced oxaloacetate production from pyruvate and CO2 with the system consisting an electron donor, a photosensitizer, diphenylviologen (PV2+) derivative as an electron mediator and ME was reported. However, the visible light-induced reduction properties of RP2+ with water-soluble Zn porphyrin have not been clarified. In this study, chemical and photo-redox properties of PV2+ were studied. In addition, to produce malate, CO2 saturated reaction solution containing triethanolamine, tetraphenylporphine tetrasulfonate (H2TPPS), pyruvate, PV2+ and ME in the presence of Mg2+, co-factor for ME was irradiated with visible-light, the oxaloacetate and malate were produced. (C) 2017 Elsevier B.V. All rights reserved.
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