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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-60372

Guttentag, Miguel; Rodenberg, Alexander; Kopelent, René; Probst, Benjamin; Buchwalder, Christian; Brandstätter, Marco; Hamm, Peter; Alberto, Roger (2012). Photocatalytic H2 production with a Rhenium/Cobalt system in water under acidic conditions. European Journal of Inorganic Chemistry, 2012(1):59-64.

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Abstract

In photocatalytic H2 formation, tertiary amines are commonly used as sacrificial electron donors, thereby limiting the pH range for studies in water and the concentration of free protons. We found that ascorbate rapidly reductively quenches the excited state of [Re(CO)3(bipy)(py)]+ (bpy = 2,2′-bipyridyl; py = pyridine). In combination with the water reduction catalyst (WRC) [Co{(DO)(DOH)pn}Br2] [(DO)(DOH)pn = N2,N2′-propanediylbis(2,3-butanedione 2-imine 3-oxime)], this system produces H2 upon irradiation with light under acidic conditions (pH range 2–6) and with significantly enhanced turnover numbers. Furthermore, we observed that, in contrast to similar systems with tertiary amines, oxidized ascorbate (dehydroascorbic acid) is slowly re-reduced during the course of photocatalysis.

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Inorganic Chemistry
07 Faculty of Science > Institute of Physical Chemistry
DDC:540 Chemistry
Language:English
Date:2012
Deposited On:11 Apr 2012 08:30
Last Modified:28 Nov 2013 05:59
Publisher:Wiley-Blackwell
ISSN:1434-1948
Publisher DOI:10.1002/ejic.201100883
Citations:Web of Science®. Times Cited: 14
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