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Ruthenium based photosensitizer/catalyst supramolecular architectures in light driven water oxidation.

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Title: Ruthenium based photosensitizer/catalyst supramolecular architectures in light driven water oxidation.
Authors: Burian, Max1, Syrgiannis, Zois2,3, La Ganga, Giuseppina4, Puntoriero, Fausto4, Natali, Mirco5, Scandola, Franco5, Campagna, Sebastiano4, Prato, Maurizio3,6,7, Bonchio, Marcella2, Amenitsch, Heinz1, Sartorel, Andrea2
Source: Inorganica Chimica Acta. Jan2017, Vol. 454, p171-175. 5p.
Subjects: Ruthenium compounds, Photosensitizers, Supramolecular chemistry, Oxidation of water, Photosynthesis, Hydrogen
Abstract: Light driven water oxidation is a key step in artificial photosynthesis, aimed at splitting water into hydrogen and oxygen with sunlight. In such process, the interactions between a photosensitizer (PS) and a water oxidation catalyst (WOC) play a crucial role in the rates of photoinduced electron transfers, determining the overall quantum efficiency of the system. In this work, by means of Small Angle X-ray Scattering (SAXS) we investigate the nature of the aggregates between ruthenium polypyridine photosensitizers (Rubpy and Ru 4 dend) and a tetraruthenium polyoxometalate (Ru 4 POM) water oxidation catalyst. Aggregate scattering is confirmed by the strong intensity-increase in the low- q regime, whereas the power law-fit of this region show slopes between −3 and −4, suggesting globular and porous aggregates. Intermolecular PS/WOC distances lower than 3 nm support the observed fast photoinduced electron transfers (<120 ps), however the proximity of the two components in the hybrids is also responsible for fast charge recombination. Approaches for inhibiting such undesired process are discussed. [ABSTRACT FROM AUTHOR]
Copyright of Inorganica Chimica Acta is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 119417490
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  Data: Ruthenium based photosensitizer/catalyst supramolecular architectures in light driven water oxidation.
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  Data: Light driven water oxidation is a key step in artificial photosynthesis, aimed at splitting water into hydrogen and oxygen with sunlight. In such process, the interactions between a photosensitizer (PS) and a water oxidation catalyst (WOC) play a crucial role in the rates of photoinduced electron transfers, determining the overall quantum efficiency of the system. In this work, by means of Small Angle X-ray Scattering (SAXS) we investigate the nature of the aggregates between ruthenium polypyridine photosensitizers (Rubpy and Ru 4 dend) and a tetraruthenium polyoxometalate (Ru 4 POM) water oxidation catalyst. Aggregate scattering is confirmed by the strong intensity-increase in the low- q regime, whereas the power law-fit of this region show slopes between −3 and −4, suggesting globular and porous aggregates. Intermolecular PS/WOC distances lower than 3 nm support the observed fast photoinduced electron transfers (&lt;120 ps), however the proximity of the two components in the hybrids is also responsible for fast charge recombination. Approaches for inhibiting such undesired process are discussed. [ABSTRACT FROM AUTHOR]
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  Data: &lt;i&gt;Copyright of Inorganica Chimica Acta is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.ica.2016.04.010
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        Text: English
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        PageCount: 5
        StartPage: 171
    Subjects:
      – SubjectFull: Ruthenium compounds
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      – SubjectFull: Photosensitizers
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      – SubjectFull: Supramolecular chemistry
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      – TitleFull: Ruthenium based photosensitizer/catalyst supramolecular architectures in light driven water oxidation.
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