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    • Keywords


      Solubilization of silica in water; step-wise design; penta-oxo coordinated silicon compounds

    • Abstract


      In an effort to design agents that could solubilize silica in water, under ambient conditions and pH, as takes place in nature, novel zwitterionic, penta-oxo-coordinated silicon compounds with siliconate cores have been prepared from 4-substituted pyridine N-oxides (H, OMe, morpholino, NO2) as donor ligands, their structures established by1H,13C and MS, and the coordination number of silicon, by29Si NMR. The formation of complexes from pyridine N-oxides is noteworthy since they arise from interaction with a weakly nucleophilic oxygen centre. The ability of the pyridine N-oxides to enhance the solubilization of silica in water has been experimentally demonstrated. Possible rationalization of this observation on the basis of O → Si coordination via the oxygen atom of pyridine N-oxide is suggested

    • Author Affiliations


      Subramania Ranganathan1 2 Ch Chandrashekhar Rao1 Suvarchala Devi Vudayagiri1 Y B R D Rajesh1 B Jagadeesh3

      1. Discovery Laboratory, Indian Institute of Chemical Technology, Hyderabad - 500 007, India
      2. Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore - 560 067, India
      3. NMR Division, Indian Institute of Chemical Technology, Hyderabad - 500 007, India
    • Dates

  • Journal of Chemical Sciences | News

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