Light‐Driven Water Splitting Mediated by Photogenerated Bromine

Abstract

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Thienopyrroledione-Based Photosensitizers as Strong Photoinduced Oxidants: Oxidation of Fe(bpy)32+ in a >1.3 V Dye-Sensitized Solar Cell

“…The product was isolated as a yellow solid (0.05 g, 0.046 mmol, 12% yield). 1 (6). To a flame-dried flask were added 4-(5-(2ethylhexyl)-4,6-dioxo-5,6-dihydro-4H-thieno [3,4-c]pyrrol-1-yl)benzaldehyde (7) (0.100 g, 0.27 mmol, 5′-chloro-2,2″,4,4″-tetrakis-(hexyloxy)-1,1′:3′,1″-terphenyl (D-Cl) (0.197 g, 0.29 mmol), and toluene (2.7 mL, 0.1 M).…”

Enhancement of Photocatalytic Activity for Hydrogen Production by Surface Modification of Pt‐TiO2 Nanoparticles with a Double Layer of Photosensitizers

“…Althoughm ost studies of DSPsh ave been conducted in the presence of sacrificial electron donators to promote the water-splittingh alf reaction, [30][31][32][33][34][35] there have been several reports concerning water reduction or overallw ater splitting in the presence of redox-reversible electron mediators. [36,37] In 1993,M allouk and co-workers achieveda na pparentq uantum yield (AQY) of 0.3 %u sing aR u II photosensitizer (PS) immobilized on the surface of aw ater reduction catalyst, Pt/ H x K 4Àx Nb 6 O 17 ,w ith iodide as ar edox-reversible electron donor. [38] In 2013, Abe et al reported overall water splitting (AQY = 0.05 %) using coumarin derivatives( NKX-2677) immobilized on Pt/H x K 4Àx Nb 6 O 17 as aw ater reductionD SP coupled with an O 2 evolution photocatalyst comprising IrO 2 -Pt/WO 3 and iodide redox mediator.…”

Photoelectrochemical Properties of SnO2 Photoanodes Sensitized by Cationic Perylene-Di-Imide Aggregates for Aqueous HBr Splitting

“…Concurrently light-driven water splitting mediated by photogenerated bromine, which activated a water oxidation catalyst, was studied employing the same sensitizer. 18 Usually, the absorber is linked to the semiconductor surface via an anchoring group, such as the carboxylic acid group forming a mono-or bidentate configuration depending on surface composition and structure. 19 Alternatively, dye− semiconductor interactions based on π-stacking/hydrophobic forces were reported.…”

“…A huge series of metal complexes or organic molecules was employed during recent years in conjunction with metal oxides: , recently, Meyer and co-workers reported an efficient ruthenium polypyridyl photocatalyst for hydrobromic acid splitting anchored on the surface of SnO 2 /TiO 2 core–shell nanostructures with two phosphonic groups. Concurrently light-driven water splitting mediated by photogenerated bromine, which activated a water oxidation catalyst, was studied employing the same sensitizer …”