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Coupling between two Ru (bda) catalysts bridged by a trans-dicyano complex
Pedro O. Abate ; Virginia M. Juárezab ; Luis M. Baraldo Dalton T.,2024,53(4):1575-1585. DOI: 10.1039/D3DT03220E
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Abstract: We have prepared two trimetallic complexes [{Ru(bda)(DMSO)(μ-CN)}2Ru(L)4] (with bda = 2,2′-bipyridine-6,6′-dicarboxylate) where two {Ru(bda)} centers are bridged by a cyanide complex of the trans-Ru(L)4CN2 family (with L = pyridine and 4-tert-butylpyridine). The complex [{Ru(bda)(DMSO)(μ-CN)}2Ru(py)4] is fully soluble in aqueous solution and is a catalyst for the oxidation of water both chemically, using Ce(IV) at pH = 1 as the terminal oxidant, and electrochemically. Both reactions are first order in the complex and the resting state of the catalyst is the [RuVRuIII(py)4RuIV]2+ redox state. Electrochemical and spectroelectrochemical studies together with (TD)DFT calculations show that the coupling between the Ru(bda) fragments for the [RuIIIRuII(py)4RuIII]2+ and [RuIVRuII(py)4RuIV]2+ redox states is very weak, but significant for the [RuVRuII(py)4RuIV]2+ ion due to the orientation of the orbitals involved. This coupling affects the reactivity of the [RuVRuII(py)4RuIV]2+ redox state, making it a much slower catalyst towards the water oxidation reaction than [RuVRuIII(py)4RuIV]2+.
Purchased from AmBeed: 4479-74-7
CAS No. : | 4479-74-7 | MDL No. : | MFCD11042476 |
Formula : | C12H8N2O4 | Boiling Point : | - |
Linear Structure Formula : | HOOC(C5H3N)(C5H3N)COOH | InChI Key : | DASAXWLMIWDYLQ-UHFFFAOYSA-N |
M.W : | 244.20 | Pubchem ID : | 9959961 |
Synonyms : |
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Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |