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- W3129968755 abstract "The reactions of monomeric [(dpp-Bian)M(thf)4] (M = Ca (1a), Sr (1b); dpp-Bian = 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene) with 4,4′-bipyridyl (4,4′-bipy) proceed with electron transfer from dpp-Bian2– to 4,4′-bipy0 to afford calcium and strontium complexes containing simultaneously radical-anionic dpp-Bian– and 4,4′-bipy– ligands. In tetrahydrofuran (thf) the reactions result in 1D coordination polymers [{(dpp-Bian)M(4,4′-bipy)(thf)2}·4thf]n (M = Ca (2a), Sr (2b)), while in a thf/benzene mixture the reaction between 1a and 4,4′-bipy affords the 2D metal–organic framework [{(dpp-Bian)Ca(4,4′-bipy)2}·2thf·2C6H6]n (3). The structures of compounds 2a,b and 3 have been determined by single-crystal X-ray analyses. The presence of the ligand-localized unpaired electrons allows the use of ESR spectroscopy for characterization of the compounds 2a,b and 3. DFT calculations of model calcium complexes with the dpp-Bian, 4,4′-bipy, and thf ligands confirm the energetically favorable open-shell configurations of the molecules bearing the 4,4′-bipy fragments. The magnetic susceptibility measurements confirm the presence of two unpaired electrons per monomeric unit in 2a,b and 3. The thermal stability of compounds 2a,b and 3 was studied by thermogravimetric analysis (TGA). To the best of our knowledge, 3 is the first MOF simultaneously containing two different paramagnetic bridging ligands inside the framework." @default.
- W3129968755 created "2021-03-01" @default.
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- W3129968755 date "2021-02-15" @default.
- W3129968755 modified "2023-10-17" @default.
- W3129968755 title "Metal–Organic Frameworks Derived from Calcium and Strontium Complexes of a Redox-Active Ligand" @default.
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- W3129968755 doi "https://doi.org/10.1021/acs.inorgchem.0c03647" @default.
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