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Photocatalytic Wate...
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Li, Xueqiang
(författare)
Photocatalytic Water Reduction and Study of the Formation of FeIFe0 Species in Diiron Catalyst Sytems
- Artikel/kapitelEngelska2012
Förlag, utgivningsår, omfång ...
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2012-03-08
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Wiley,2012
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:kth-96450
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-96450URI
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https://doi.org/10.1002/cssc.201100490DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
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QC 20120604
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Noble-metal-free systems with bio-inspired diiron dithiolate mimics of the [FeFe]-hydrogenase active site, namely, [(mu-pdt)Fe2(CO)5L] [pdt=propanedithiolate; L=P(CH2OH)3 (1), P(CH3)3 (2)], as water reduction catalysts with xanthene dyes as photosensitizers and triethylamine as a sacrificial electron donor were studied for visible-light-driven water reduction to hydrogen. These systems display good catalytic activities with the efficiencies in hydrogen evolution of up to 226 turnovers for 1, if Eosin Y was used as the photosensitizer in an environmentally benign solvent (EtOH/H2O) after 15 h of irradiation (?>450 nm) under optimal conditions. Under all of the conditions adopted, 1 that has a water soluble phosphine ligand, P(CH2OH)3 displayed a higher efficiency than 2, which bears a PMe3 ligand. The photoinduced electron transfer in the systems was studied using fluorescence, transient absorption, time-resolved UV/Vis, and in situ electron paramagnetic resonance (EPR) spectroscopy. A new electron-transfer mechanism is proposed for hydrogen evolution by these iron-based photocatalytic systems.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Wang, Mei
(författare)
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Chen, Lin
(författare)
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Wang, Xiuna
(författare)
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Dong, Jingfeng
(författare)
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Sun, LichengKTH,Organisk kemi(Swepub:kth)u1umfd9h
(författare)
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KTHOrganisk kemi
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:ChemSusChem: Wiley5:5, s. 913-9191864-5631
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