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Homo-valent diruthenium(II,II) carbonates have been underexplored hitherto. This paper reports the synthesis and crystal structure of a diruthenium(II,II) compound, NaRu(CO)·10HO (1). It has a two-dimensional structure in which the paddle-wheel diruthenium units of Ru(CO) are cross-linked through the carbonate groups. The investigation of the primary magnetic properties and theoretical studies with density functional theory (DFT) reveal that weak antiferromagnetic interactions are propagated between the Ru units which contain two unpaired electrons in an electron configuration σπδπ*δ* with a ground state = 1. According to Raman spectrum measurements combined with theoretical calculations, the strong peak at 356 cm in the small-wavenumber region was assigned to the stretching of the Ru-Ru double bonds.
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http://dx.doi.org/10.1039/d2dt03846c | DOI Listing |
Chem Commun (Camb)
June 2025
Department of Chemistry, Visvesvaraya National Institute of Technology, Nagpur-440010, India.
Ligand-directed structure modulation is observed during the synthesis of mixed-metallic vanado-molybdate complexes functionalized with pyridinyl diphosphonate ligand(s). The structural assembly is determined by the location of the nitrogen-atom at the aromatic ring of the pyridinyl-ligands, forming either a tetra-nuclear mixed-valence V(III/IV)-containing complex (1) having a butterfly-like structure, or a monocentric S-shaped complex (2) containing an octahedral V(III). Photocatalytic hydrogen evolution from water (HER) studies show higher catalytic activity by complex 1, as compared with complex 2, attributed to the delocalization of spin densities between V(III) and V(IV) in 1.
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January 2023
Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Xi'an Key Laboratory of Functional Supramolecular Structure and Materials, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, P. R. China.
Homo-valent diruthenium(II,II) carbonates have been underexplored hitherto. This paper reports the synthesis and crystal structure of a diruthenium(II,II) compound, NaRu(CO)·10HO (1). It has a two-dimensional structure in which the paddle-wheel diruthenium units of Ru(CO) are cross-linked through the carbonate groups.
View Article and Find Full Text PDFPhys Chem Chem Phys
September 2021
Department of Electronic Structure Theory, Max Planck Institute for Solid State Research, Heisenbergstraße 1, 70569 Stuttgart, Germany.
In this work we apply a quantum chemical framework, recently designed in our laboratories, to rationalize the low-energy electronic spectrum and the magnetic properties of an homo-valent trinuclear [MnO] model of the oxygen-evolving center in photosystem II. The method is based on chemically motivated molecular orbital unitary transformations, and the optimization of spin-adapted many-body wave functions, both for ground- and excited-states, in the transformed MO basis. In this basis, the configuration interaction Hamiltonian matrix of exchange-coupled multi-center clusters is extremely sparse and characterized by a unique block diagonal structure.
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February 2021
Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, P. R. China.
Polymeric coordination compounds based on Cr2n+ paddle-wheel building blocks with non-carboxylate O,O-donor ligands chelating and bridging the Cr-Cr centers have been underexplored hitherto. This paper reports the synthesis and crystal structure of a new homo-valent chromium(ii,ii) compound, Na3HCr2(CO3)4·10H2O (1). It has a two-dimensional structure in which the paddlewheel chromium(ii,ii) units of Cr2(CO3)44- are cross-linked through the carbonate groups.
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June 2019
Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, P. R. China.
The synthesis of antiferromagnets (AFMs) has attracted extensive attention in the area of magnetic devices, such as spintronics and memory devices. Following our initial work on the employment of the homo-valent diruthenium(iii,iii) paddle wheel species with high spin states (S = 2) as building blocks and active components for the construction of molecule-based magnetic materials, the reaction of mixed-valent diruthenium(ii,iii) phosphates Ru(HPO)(HPO)(HO)·2HO (1) with HO, Cu and ACl (A = K, Rb and Cs) in aqueous solution led to the formation of heterometallic copper diruthenium(iii,iii) phosphates A[Cu(HO)Ru(HPO)(PO)(HO)]·nHO [A = K (2); A = Rb and n = 2 (3); A = Cs and n = 3 (4)]. The compounds consist of chain structures in which each octahedral environment of Cu(HO) bonds to two [Ru(HPO)(PO)] units in a trans manner, forming a ferrimagnetic negative chain {Cu(HO)Ru(HPO)(PO)(HO)}, exhibiting anomalous magnetic properties.
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