Syntheses and structures of transition metal-hedp compounds and the template influences (hedp=1-hydroxyethylidenediphosphonate)

The chemistry of metal phosphonates has been of increasing interest during the past two decades, owing to their practical applications as ion exchange rs, catalysts and sensors. Great efforts have been devoted to the metal dip hosphonates, by modifying the organic tether (R) of R(PO3H2)(2), to explore new materials with large pores and interesting functions. The template eff ect on directing the formation of different metal diphosphonate structures, however, has not been well documented. We present here the syntheses and s tructures of eleven M-hedp compounds, where M=Cu, Fe, Ni; hedp = 1-hydroxye thylidenediphosphonate. The influences of templates on the final products a re discussed.