Photocatalytic CO 2 Reduction Using Mixed Catalytic Systems Comprising an Iron Cation with Bulky Phenanthroline Ligands.

Autor:	Takeda H; Division of Molecular Science, Faculty of Science and Technology, Gunma University, 1-5-1 Tenjin, Kiryu, Gunma 376-8515, Japan., Irimajiri M; Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan., Mizutani T; Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan., Nozawa S; High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan., Matsuura Y; Division of Molecular Science, Faculty of Science and Technology, Gunma University, 1-5-1 Tenjin, Kiryu, Gunma 376-8515, Japan., Kurosu M; Division of Molecular Science, Faculty of Science and Technology, Gunma University, 1-5-1 Tenjin, Kiryu, Gunma 376-8515, Japan., Ishitani O; Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1-NE-1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan.; Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashihiroshima, Hiroshima 739-8526, Japan.
Jazyk:	angličtina
Zdroj:	Inorganic chemistry [Inorg Chem] 2024 Apr 22; Vol. 63 (16), pp. 7343-7355. Date of Electronic Publication: 2024 Apr 10.
DOI:	10.1021/acs.inorgchem.4c00247
Abstrakt:	This study reports on efficient photocatalytic CO 2 reduction reactions using mixed catalytic systems of an Fe ion source and various 1,10-phenanthroline derivatives ( R 1 R 2 p ) as ligands in the presence of triethanolamine (TEOA). As the relatively bulky substituents at positions 2 and 9 of R 1 R 2 p weakened the ability to coordinate to the Fe ion, the Fe ion formed TEOA complexes. The free R 1 R 2 p accepted an electron from the reduced photosensitizer through proton-coupled electron transfer (PCET) using protons of TEOA dissolved in a CH 3 CN solution in a CO 2 atmosphere as the initial step of the catalytic cycle. Although the mixed system of the nonsubstituted 1,10-phenanthroline generates a stable tris(phenanthroline)-Fe(II) complex in solution, this complex could not function as a CO 2 reduction catalyst. The mechanism in which R 1 R 2 p interacts with the Fe ion after PCET was proposed for this efficient photocatalytic CO 2 reduction. The proposed photocatalytic system using the 2,9-di- sec -butyl-phenanthroline ligand could produce CO with high efficiency (quantum yield of 8.2%) combined with a dinuclear Cu(I) complex as a photosensitizer.
Databáze:	MEDLINE
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