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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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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 > Department of Chemistry
DDC:540 Chemistry
Deposited On:11 Apr 2012 06:30
Last Modified:15 Jul 2014 03:26
Publisher DOI:10.1002/ejic.201100883
Citations:Web of Science®. Times Cited: 20
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Scopus®. Citation Count: 17

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