Effect of chemical structure of bipyridinium salts as electron carrier on the visible-light induced conversion of CO2 to formic acid with the system consisting of water-soluble zinc porphyrin and formate dehydrogenase

Abstract

A B S T R A C TEffect of chemical structures of some 2,2 0 -bipyridinium salts (BP 2+ ) as the electron carrier molecules on the visible-light induced conversion of CO 2 to formic acid with the system consisting of water-soluble zinc tetraphneylporphyrin tetrasulfonate (ZnTPPS) and formate dehydrogenase (FDH) in the presence of triethanolamine (TEOA) as an electron donor molecule was investigated. Irradiation of a CO 2 saturated solution containing TEOA, ZnTPPS, BP 2+ and FDH with visible light resulted in production of formic acid. By using 1,1 0 -ethylene-2,2 0 -bipyridinium dibromide (DB 2+ ) as an electron carrier molecule, the effective formic acid production was observed compared with the other 2,2 0 -bipyridinium salt derivatives.

Application of a Water‐Soluble Matrix‐Stabilized Palladium Nanoparticle Catalyst for Photocatalytic Hydrogen Generation with High Activity and Stability

“…The zinc-centered water-soluble Zinc(II)-tetrakis(4-sulfonatophenyl)porphyrin (ZnTPPS 4À , 4)h as been used as as ingle electron donor compound in photocatalytic reactions before, [19] as well as been investigatedf or hydrogen generation in our group with surprising activity even without ac atalyst. [20] Additionally,w hile it will still bleach after overnight irradiation, it is more stable than Eosin Ya nd might be ag ood startingp oint for further,e ven more stable, derivatisations.…”

Efficient bioelectrocatalytic CO2 reduction on gas-diffusion-type biocathode with tungsten-containing formate dehydrogenase

“…W-containing FoDH-catalyzed HCOO − oxidation occurs at the W center of the enzymes [36]. This reaction does not involve oxygen atom transfer: the product of HCOO − oxidation is CO 2 and not hydrogen carbonate, as was clearly demonstrated by the formation of 13 C 16 O 2 gas during the oxidation of 13 C-labeled formate in 18 O-enriched water [37]. The FoDH1-catalyzed CO 2 reduction seems to follow the reverse reaction mechanism.…”

“…TQ was synthesized according to a literature procedure [18]. Briefly, 2,2'-bipyridine (10 mmol) was dissolved in 300 mL of acetonitrile and then 1,3-dibromopropane (100 mmol) was added to this solution and the reaction mixture was refluxed for 48 h. The yellow precipitate was collected by filtration and washed with acetonitrile.…”

“…On the other hand, certain FoDHs have been reported to act as CO 2 reductases, and there are several reports of bioelectrocatalytic CO 2 reduction with such FoDHs [13][14][15][16][17][18][19][20]. The enzymes allow the system to function for a specific biological reaction under mild and safe conditions, such as neutral pH, room temperature, and atmospheric pressure [13][14][15][16][17][18][19][20]. The electro-enzymatic devices can be used as energy conversion systems, such as efficient bioelectrochemical systems for CO 2 reduction.…”

An Artificial Co‐enzyme Based on the Viologen Skeleton for Highly Efficient CO2 Reduction to Formic Acid with Formate Dehydrogenase

“…The resultant k cat value of the reduced form of DC 2+ is the lowest compared with the other viologen derivatives. In this study, the effect of the functional group (amino or carboxyl group) in the reduced form of viologen derivatives on the CO 2 reduction activity with FDH was revealed and this result is important for the development of viologen derivatives for improvement of CO 2 reduction activity . We expect that controlling catalytic activity through manipulation of functional groups in artificial co‐enzymes will be applied in other enzyme systems.…”