Abstract
Phosphine substituted hydrazones with or without nitro substituents were synthesized and characterized by multinuclear NMR, FT-IR, UV-Vis spectroscopy and single crystal X-ray diffraction. The anion recognition properties of phosphine oxides {Ph2P(O)C6H4CHNNHPh} (2) and {Ph2P(O)C6H4 CHNNHC6H3(2,4-NO2)2} (4) with anions (F−, Cl −, Br −, I −, CH3COO− and H2 \(_{2}\textit {PO}_{4}^{\mathrm {-}}\)) were investigated. The selectivity towards these anions is attributed to the hydrogen bonding capability of the NH bond. Competitive titrations have shown that the binding ability of fluoride with 4 is not influenced by the presence of other anions. Synthesis of hydrozone derivatives appended to phosphineoxide and anion sensing properties are described.
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