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Ligand-induced substrate steering and reshaping of [Ag2(H)]+ scaffold for selective CO2 extrusion from formic acid

Identifieur interne : 003651 ( Ncbi/Curation ); précédent : 003650; suivant : 003652

Ligand-induced substrate steering and reshaping of [Ag2(H)]+ scaffold for selective CO2 extrusion from formic acid

Auteurs : Athanasios Zavras [Australie] ; George N. Khairallah [Australie] ; Marjan Krsti [Croatie] ; Marion Girod [France] ; Steven Daly [France] ; Rodolphe Antoine [France] ; Philippe Maitre [France] ; Roger J. Mulder [Australie] ; Stefanie-Ann Alexander [Australie] ; Vlasta Bona I Kouteck [Croatie, Allemagne] ; Philippe Dugourd [France] ; Richard A. J. O'Hair [Australie]

Source :

RBID : PMC:4897753

Abstract

Metalloenzymes preorganize the reaction environment to steer substrate(s) along the required reaction coordinate. Here, we show that phosphine ligands selectively facilitate protonation of binuclear silver hydride cations, [LAg2(H)]+ by optimizing the geometry of the active site. This is a key step in the selective, catalysed extrusion of carbon dioxide from formic acid, HO2CH, with important applications (for example, hydrogen storage). Gas-phase ion-molecule reactions, collision-induced dissociation (CID), infrared and ultraviolet action spectroscopy and computational chemistry link structure to reactivity and mechanism. [Ag2(H)]+ and [Ph3PAg2(H)]+ react with formic acid yielding Lewis adducts, while [(Ph3P)2Ag2(H)]+ is unreactive. Using bis(diphenylphosphino)methane (dppm) reshapes the geometry of the binuclear Ag2(H)+ scaffold, triggering reactivity towards formic acid, to produce [dppmAg2(O2CH)]+ and H2. Decarboxylation of [dppmAg2(O2CH)]+ via CID regenerates [dppmAg2(H)]+. These gas-phase insights inspired variable temperature NMR studies that show CO2 and H2 production at 70 °C from solutions containing dppm, AgBF4, NaO2CH and HO2CH.


Url:
DOI: 10.1038/ncomms11746
PubMed: 27265868
PubMed Central: 4897753

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PMC:4897753

Le document en format XML

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<sub>2</sub>
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<sup>+</sup>
scaffold for selective CO
<sub>2</sub>
extrusion from formic acid</title>
<author>
<name sortKey="Zavras, Athanasios" sort="Zavras, Athanasios" uniqKey="Zavras A" first="Athanasios" last="Zavras">Athanasios Zavras</name>
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<institution>School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne</institution>
, 30 Flemington Road, Parkville, Victoria 3010,
<country>Australia</country>
</nlm:aff>
<country xml:lang="fr">Australie</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
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<affiliation wicri:level="1">
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<institution>ARC Centre of Excellence for Free Radical Chemistry and Biotechnology</institution>
, 30 Flemington Road, Parkville, Victoria 3010,
<country>Australia</country>
</nlm:aff>
<country xml:lang="fr">Australie</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
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<name sortKey="Alexander, Stefanie Ann" sort="Alexander, Stefanie Ann" uniqKey="Alexander S" first="Stefanie-Ann" last="Alexander">Stefanie-Ann Alexander</name>
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<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
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<title xml:lang="en" level="a" type="main">Ligand-induced substrate steering and reshaping of [Ag
<sub>2</sub>
(H)]
<sup>+</sup>
scaffold for selective CO
<sub>2</sub>
extrusion from formic acid</title>
<author>
<name sortKey="Zavras, Athanasios" sort="Zavras, Athanasios" uniqKey="Zavras A" first="Athanasios" last="Zavras">Athanasios Zavras</name>
<affiliation wicri:level="1">
<nlm:aff id="a1">
<institution>School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne</institution>
, 30 Flemington Road, Parkville, Victoria 3010,
<country>Australia</country>
</nlm:aff>
<country xml:lang="fr">Australie</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
<affiliation wicri:level="1">
<nlm:aff id="a2">
<institution>ARC Centre of Excellence for Free Radical Chemistry and Biotechnology</institution>
, 30 Flemington Road, Parkville, Victoria 3010,
<country>Australia</country>
</nlm:aff>
<country xml:lang="fr">Australie</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author>
<name sortKey="Khairallah, George N" sort="Khairallah, George N" uniqKey="Khairallah G" first="George N." last="Khairallah">George N. Khairallah</name>
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<nlm:aff id="a1">
<institution>School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne</institution>
, 30 Flemington Road, Parkville, Victoria 3010,
<country>Australia</country>
</nlm:aff>
<country xml:lang="fr">Australie</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
<affiliation wicri:level="1">
<nlm:aff id="a2">
<institution>ARC Centre of Excellence for Free Radical Chemistry and Biotechnology</institution>
, 30 Flemington Road, Parkville, Victoria 3010,
<country>Australia</country>
</nlm:aff>
<country xml:lang="fr">Australie</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author>
<name sortKey="Krsti, Marjan" sort="Krsti, Marjan" uniqKey="Krsti M" first="Marjan" last="Krsti">Marjan Krsti</name>
<affiliation wicri:level="1">
<nlm:aff id="a3">
<institution>Center of Excellence for Science and Technology – Integration of Mediterranean region (STIM) at Interdisciplinary Center for Advanced Science and Technology (ICAST), University of Split</institution>
, Meštrovićevo šetalište 45, 21000 Split,
<country>Croatia</country>
</nlm:aff>
<country xml:lang="fr">Croatie</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author>
<name sortKey="Girod, Marion" sort="Girod, Marion" uniqKey="Girod M" first="Marion" last="Girod">Marion Girod</name>
<affiliation wicri:level="1">
<nlm:aff id="a4">
<institution>Institut des Sciences Analytiques, Université de Lyon, Université Lyon 1-CNRS-ENS Lyon</institution>
, 69100 Villeurbanne,
<country>France</country>
</nlm:aff>
<country xml:lang="fr">France</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author>
<name sortKey="Daly, Steven" sort="Daly, Steven" uniqKey="Daly S" first="Steven" last="Daly">Steven Daly</name>
<affiliation wicri:level="1">
<nlm:aff id="a5">
<institution>Institut Lumière Matière, Université Lyon 1-CNRS, Université de Lyon</institution>
69622 Villeurbanne Cedex,
<country>France</country>
</nlm:aff>
<country xml:lang="fr">France</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author>
<name sortKey="Antoine, Rodolphe" sort="Antoine, Rodolphe" uniqKey="Antoine R" first="Rodolphe" last="Antoine">Rodolphe Antoine</name>
<affiliation wicri:level="1">
<nlm:aff id="a5">
<institution>Institut Lumière Matière, Université Lyon 1-CNRS, Université de Lyon</institution>
69622 Villeurbanne Cedex,
<country>France</country>
</nlm:aff>
<country xml:lang="fr">France</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author>
<name sortKey="Maitre, Philippe" sort="Maitre, Philippe" uniqKey="Maitre P" first="Philippe" last="Maitre">Philippe Maitre</name>
<affiliation wicri:level="1">
<nlm:aff id="a6">
<institution>Laboratoire de Chimie Physique, Bâtiment 349, Université Paris-Sud, CNRS, Université Paris-Saclay</institution>
, F-91405 Orsay,
<country>France</country>
</nlm:aff>
<country xml:lang="fr">France</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author>
<name sortKey="Mulder, Roger J" sort="Mulder, Roger J" uniqKey="Mulder R" first="Roger J." last="Mulder">Roger J. Mulder</name>
<affiliation wicri:level="1">
<nlm:aff id="a7">
<institution>CSIRO Manufacturing</institution>
, Bayview Avenue, Clayton, Victoria 3168,
<country>Australia</country>
</nlm:aff>
<country xml:lang="fr">Australie</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author>
<name sortKey="Alexander, Stefanie Ann" sort="Alexander, Stefanie Ann" uniqKey="Alexander S" first="Stefanie-Ann" last="Alexander">Stefanie-Ann Alexander</name>
<affiliation wicri:level="1">
<nlm:aff id="a1">
<institution>School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne</institution>
, 30 Flemington Road, Parkville, Victoria 3010,
<country>Australia</country>
</nlm:aff>
<country xml:lang="fr">Australie</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
<affiliation wicri:level="1">
<nlm:aff id="a2">
<institution>ARC Centre of Excellence for Free Radical Chemistry and Biotechnology</institution>
, 30 Flemington Road, Parkville, Victoria 3010,
<country>Australia</country>
</nlm:aff>
<country xml:lang="fr">Australie</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author>
<name sortKey="Bona I Kouteck, Vlasta" sort="Bona I Kouteck, Vlasta" uniqKey="Bona I Kouteck V" first="Vlasta" last="Bona I Kouteck">Vlasta Bona I Kouteck</name>
<affiliation wicri:level="1">
<nlm:aff id="a3">
<institution>Center of Excellence for Science and Technology – Integration of Mediterranean region (STIM) at Interdisciplinary Center for Advanced Science and Technology (ICAST), University of Split</institution>
, Meštrovićevo šetalište 45, 21000 Split,
<country>Croatia</country>
</nlm:aff>
<country xml:lang="fr">Croatie</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
<affiliation wicri:level="1">
<nlm:aff id="a8">
<institution>Humboldt-Universität Berlin, Institut für Chemie</institution>
, 12489 Berlin,
<country>Germany</country>
</nlm:aff>
<country xml:lang="fr">Allemagne</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author>
<name sortKey="Dugourd, Philippe" sort="Dugourd, Philippe" uniqKey="Dugourd P" first="Philippe" last="Dugourd">Philippe Dugourd</name>
<affiliation wicri:level="1">
<nlm:aff id="a5">
<institution>Institut Lumière Matière, Université Lyon 1-CNRS, Université de Lyon</institution>
69622 Villeurbanne Cedex,
<country>France</country>
</nlm:aff>
<country xml:lang="fr">France</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
<author>
<name sortKey="O Hair, Richard A J" sort="O Hair, Richard A J" uniqKey="O Hair R" first="Richard A. J." last="O'Hair">Richard A. J. O'Hair</name>
<affiliation wicri:level="1">
<nlm:aff id="a1">
<institution>School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne</institution>
, 30 Flemington Road, Parkville, Victoria 3010,
<country>Australia</country>
</nlm:aff>
<country xml:lang="fr">Australie</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
<affiliation wicri:level="1">
<nlm:aff id="a2">
<institution>ARC Centre of Excellence for Free Radical Chemistry and Biotechnology</institution>
, 30 Flemington Road, Parkville, Victoria 3010,
<country>Australia</country>
</nlm:aff>
<country xml:lang="fr">Australie</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
</affiliation>
</author>
</analytic>
<series>
<title level="j">Nature Communications</title>
<idno type="eISSN">2041-1723</idno>
<imprint>
<date when="2016">2016</date>
</imprint>
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<front>
<div type="abstract" xml:lang="en">
<p>Metalloenzymes preorganize the reaction environment to steer substrate(s) along the required reaction coordinate. Here, we show that phosphine ligands selectively facilitate protonation of binuclear silver hydride cations, [LAg
<sub>2</sub>
(H)]
<sup>+</sup>
by optimizing the geometry of the active site. This is a key step in the selective, catalysed extrusion of carbon dioxide from formic acid, HO
<sub>2</sub>
CH, with important applications (for example, hydrogen storage). Gas-phase ion-molecule reactions, collision-induced dissociation (CID), infrared and ultraviolet action spectroscopy and computational chemistry link structure to reactivity and mechanism. [Ag
<sub>2</sub>
(H)]
<sup>+</sup>
and [Ph
<sub>3</sub>
PAg
<sub>2</sub>
(H)]
<sup>+</sup>
react with formic acid yielding Lewis adducts, while [(Ph
<sub>3</sub>
P)
<sub>2</sub>
Ag
<sub>2</sub>
(H)]
<sup>+</sup>
is unreactive. Using bis(diphenylphosphino)methane (dppm) reshapes the geometry of the binuclear Ag
<sub>2</sub>
(H)
<sup>+</sup>
scaffold, triggering reactivity towards formic acid, to produce [dppmAg
<sub>2</sub>
(O
<sub>2</sub>
CH)]
<sup>+</sup>
and H
<sub>2</sub>
. Decarboxylation of [dppmAg
<sub>2</sub>
(O
<sub>2</sub>
CH)]
<sup>+</sup>
via CID regenerates [dppmAg
<sub>2</sub>
(H)]
<sup>+</sup>
. These gas-phase insights inspired variable temperature NMR studies that show CO
<sub>2</sub>
and H
<sub>2</sub>
production at 70 °C from solutions containing dppm, AgBF
<sub>4</sub>
, NaO
<sub>2</sub>
CH and HO
<sub>2</sub>
CH.</p>
</div>
</front>
<back>
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<name sortKey="Menger, F M" uniqKey="Menger F">F. M. Menger</name>
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