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Issue 37, 2016
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Solution or solid – it doesn't matter: visible light-induced CO release reactivity of zinc flavonolato complexes

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Abstract

Two types of zinc flavonolato complexes ([(6-Ph2TPA)Zn(flavonolato)]ClO4 and Zn(flavonolato)2) of four extended flavonols have been prepared, characterized, and evaluated for visible light-induced CO release reactivity. Zinc coordination of each flavonolato anion results in a red-shift of the lowest energy absorption feature and in some cases enhanced molar absorptivity relative to the free flavonol. The zinc-coordinated flavonolato ligands undergo visible light-induced CO release with enhanced reaction quantum yields relative to the neutral flavonols. Most notable is the discovery that both types of zinc flavonolato derivatives undergo similar visible light-induced CO release reactivity in solution and in the solid state. A solid film of a Zn(flavonolato)2 derivative was evaluated as an in situ CO release agent for aerobic oxidative palladium-catalyzed alkoxycarbonylation to produce esters in ethanol. The CO release product was found to undergo ester alcolysis under the conditions of the carbonylation reaction.

Graphical abstract: Solution or solid – it doesn't matter: visible light-induced CO release reactivity of zinc flavonolato complexes

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Publication details

The article was received on 01 May 2016, accepted on 23 Aug 2016 and first published on 23 Aug 2016


Article type: Paper
DOI: 10.1039/C6DT01709F
Citation: Dalton Trans., 2016,45, 14570-14580
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    Solution or solid – it doesn't matter: visible light-induced CO release reactivity of zinc flavonolato complexes

    S. N. Anderson, M. T. Larson and L. M. Berreau, Dalton Trans., 2016, 45, 14570
    DOI: 10.1039/C6DT01709F

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