Poly(α‐Aminophosphine Chalcogenide) Networks: Synthesis, Characterization, and Application for Metal Sequestration

ABSTRACT Quaternary mixtures of primary phosphine, chalcogen, diimine, and triimine were employed in polymerization reactions to give α‐aminophosphine chalcogenide polymer networks. Six networks were prepared that differed in the chalcogen (O, S) and the aryl substituents on the imine precursors (Ph, 4‐F‐C 6 H 4 , 2‐OH‐C 6 H 4 ). The swellability of the networks in different solvents was evaluated. Four networks displayed exceptional swelling (2–8 × mass increase) with polar aprotic solvents THF and DCM. A mono(α‐aminophosphine) oxide molecule was prepared as a molecular model of the parent network, and it was successfully coordinated to via monodentate binding through the oxide. The parent phosphine oxide network 6O effectively sequestered and Fe 3+ ions from THF solutions.