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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/116/03/0169-0174

    • 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

       
      Published
      May 2004
      Manuscript received
      1 March 2004
      Manuscript revised
      24 April 2004

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