Abhishek Kumar

Publications (3) View all

• Dataset: Surface Photografting of Novel Sulfobetaine Copolymers on Silica

  Abhishek Kumar, Nazia Tarannum, Meenakshi Singh
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  ABSTRACT: A couple of novel sulfobetaine copolymer is developed via Michael-type addition reaction. The comonomers, diamines and maleimide react via Michael reaction through UV irradiation using AIBN as photoinitiator producing polyamine chain. Further, sulfobetaine copolymers were obtained on treatment of the polyamine with sulfopropylating agent, 1,3-propane sultone. These novel sulfobetaine polymers were grafted on silica surface to produce responsive biocompatible surface. This easy straightforward, catalyst free facile protocol for synthesis of polymer grafted surface is useful for developing biomedical devices. Additionally, both the copolymers show fluorescence characteristics.
• Dataset: Water-compatible 'aspartame'-imprinted polymer grafted on silica surface for selective recognition in aqueous solution

  Meenakshi Singh, Abhishek Kumar, Nazia Tarannum
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  ABSTRACT: Molecularly imprinted polymers selective for as-partame have been prepared using N-[2-ammonium-ethyl-piperazinium) maleimidopropane sulfonate copolymer bear-ing zwitterionic centres along the backbone via a surface-confined grafting procedure. Aspartame, a dipeptide, is com-monly used as an artificial sweetener. Polymerisation on the surface was propagated by means of Michael addition reaction on amino-grafted silica surface. Electrostatic interactions along with complementary H-bonding and other hydrophobic interactions inducing additional synergetic effect between the template (aspartame) and the imprinted surface led to the formation of imprinted sites. The MIP was able to selectively and specifically take up aspartame from aqueous solution and certain pharmaceutical samples quantitatively. Hence, a facile, specific and selective technique using surface-grafted specific molecular contours developed for specific and selective up-take of aspartame in the presence of various interferrants, in different kinds of matrices is presented.
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  Available from: Abhishek Kumar

  Article: Surface Photografting of Novel Sulfobetaine Copolymers on Silica

  Abhishek Kumar, Nazia Tarannum, Meenakshi Singh
  [show abstract] [hide abstract]
  ABSTRACT: A couple of novel sulfobetaine copolymer is developed via Michael-type addition reaction. The comonomers, diamines and maleimide react via Michael reaction through UV irradiation using AIBN as photoinitiator producing polyamine chain. Further, sulfobetaine copolymers were obtained on treatment of the polyamine with sulfopropylating agent, 1,3-propane sultone. These novel sulfobetaine polymers were grafted on silica surface to produce responsive biocompatible surface. This easy straightforward, catalyst free facile protocol for synthesis of polymer grafted surface is useful for developing biomedical devices. Additionally, both the copolymers show fluorescence characteristics.
  Material Science and Application. 01/2012; 337066(3-3):467-477.