FORMATION OF PEROXODIPHOPHORIC ACID AND PHOSPHORIC RADICAL BY THE REACTION OF PHOSPHINATE ION WITH MOLECULAR OXYGEN － AUTO-CATALYZED REACTION

抄録

The peroxodiphosphoric acid denoted by PDP ( = H₄P₂O₈, H₃P₂O₈^–, H₂P₂O₈^2–, HP₂O₈^3– and P₂O₈^4–) was formed through the phosphoric radical (H₂PO₄^·) by the reaction between phosphinate ion ( PH₂O₂^– ) and molecular oxygen ( O₂ ). The PDP formation reactions were occured by the auto-catalyzed reaction mechanisms containing the radicals. Such the auto-catalyzed reactions were greatly accelerated by the induced-redox catalyzers of Cu (II), Cr (VI), and [Ru(bpy)₃]²⁺ (= a photo-catalysis). From combinig the auto-catalyzed reactions containing the redox couples of PH₂O₂^– / PH₂O₂^· and O₂ /O₂^– with the redox-chain couples of Mⁿ⁺/ M^(n–1)+, the former reactions were extremely accelerated by the latter redox-chain couples of Mⁿ⁺/ M^(n–1)+ which are called as the homogeneous induced catalysis (or catalyzer and catalyst).