Rare examples are known of non-covalent immobilization of water-soluble transition metal complexes onto solid supports and their application in catalytic hydrogenations in neat water. In the present work we report on the synthesis of a novel Ir (I) complex bearing the water soluble monodentate cage phosphine PTA (PTA= 1, 3, 5-triaza-7- phosphaadamantane) and its immobilisation onto commercial ion-exchange resins by a ...