AbstractThe evolution of H2 by near-infrared light irradiation is an unprecedented phenomenon that makes use of an extended wavelength range of the solar spectrum. In their Communication (DOI: 10.1002/anie.201708996), K. Sakai et al. report photocatalytic H2 evolution using a polypyridyl triruthenium photosensitizer with light-harvesting properties. The photosensitizer promotes H2 evolution under light irradiation at 700–800 nm.
In order to realize the artificial photosynthetic devices splitting water to H2 and O2 (2H2O + hν → 2H2 + O2), it is desirable to utilize a wider wavelength range of light that extends to a lower energy region of solar spectrum. Here we report a triruthenium photosensitizer [Ru3(dmbpy)6(μ-HAT)]6+ (dmbpy = 4,4'-dimethyl-2,2'-bipyridine, HAT = 1,4,5,8,9,12-hexaazatriphenylene), which absorbs near-infrared light up to 800 nm based on its 1MLCT transition.
K. Morita, K. Takijiri, K. Sakai and H. Ozawa,
Dalton Trans., 2017, Accepted Manuscript
, DOI: 10.1039/C7DT03710D
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