5 research outputs found

    Synthesis and Lanthanide Coordination Chemistry of Phosphine Oxide Decorated Dibenzothiophene and Dibenzothiophene Sulfone Platforms

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    Syntheses for new ligands based upon dibenzothiophene and dibenzothiophene sulfone platforms, decorated with phosphine oxide and methylphosphine oxide donor groups, are described. Coordination chemistry of 4,6-bis­(diphenylphosphinoylmethyl)­dibenzothiophene (<b>8</b>), 4,6-bis­(diphenylphosphinoylmethyl)­dibenzothiophene-5,5-dioxide (<b>9</b>) and 4,6-bis­(diphenylphosphinoyl)­dibenzothiophene-5,5-dioxide (<b>10</b>) with lanthanide nitrates, Ln­(NO<sub>3</sub>)<sub>3</sub>·(H<sub>2</sub>O)<sub><i>n</i></sub> is outlined, and crystal structure determinations reveal a range of chelation interactions on Ln­(III) ions. The nitric acid dependence of the solvent extraction performance of <b>9</b> and <b>10</b> in 1,2-dichloroethane for Eu­(III) and Am­(III) is described and compared against the extraction behavior of related dibenzofuran ligands (<b>2</b>, <b>3</b>; R = Ph) and <i>n</i>-octyl­(phenyl)-<i>N</i>,<i>N</i>-diisobutylcarbamoylmethyl phosphine oxide (<b>4</b>) measured under identical conditions
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