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Multifunctional Polyoxometalate Platforms for Supramolecular Light‐Driven Hydrogen Evolution **
Author(s) -
Maloul Salam,
Borg Matthias,
Müller Carolin,
Zedler Linda,
Mengele Alexander K.,
Gaissmaier Daniel,
Jacob Timo,
Rau Sven,
DietzekIvanšić Benjamin,
Streb Carsten
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202103817
Subject(s) - polyoxometalate , supramolecular chemistry , photosensitizer , catalysis , reactivity (psychology) , chemistry , photochemistry , materials science , nanotechnology , combinatorial chemistry , molecule , organic chemistry , medicine , alternative medicine , pathology
Multifunctional supramolecular systems are a central research topic in light‐driven solar energy conversion. Here, we report a polyoxometalate (POM)‐based supramolecular dyad, where two platinum‐complex hydrogen evolution catalysts are covalently anchored to an Anderson polyoxomolybdate anion. Supramolecular electrostatic coupling of the system to an iridium photosensitizer enables visible light‐driven hydrogen evolution. Combined theory and experiment demonstrate the multifunctionality of the POM, which acts as photosensitizer/catalyst‐binding‐site [1] and facilitates light‐induced charge‐transfer and catalytic turnover. Chemical modification of the Pt‐catalyst site leads to increased hydrogen evolution reactivity. Mechanistic studies shed light on the role of the individual components and provide a molecular understanding of the interactions which govern stability and reactivity. The system could serve as a blueprint for multifunctional polyoxometalates in energy conversion and storage.