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Kumar B.S.,Vel Technology Engineering College | Reddy Y.H.,Sri Venakateswara University | Rani C.R.,Sri Venakateswara University | Sekhar Reddy G.C.,Sri Venakateswara University
E-Journal of Chemistry | Year: 2011

Aminophosphonates (4a-j) were synthesized in one-pot simultaneous reaction of 4-bromo-3-methyl benzenamine (1), dimethylphosphite (3) and different aromatic aldehydes (2a-j) by Kabachnik-Fields reaction in the presence of tetramethylguanidine (TMG) (10 mole%) as catalyst in toluene at reflux temperature afforded 4a-j in good yields. All these compounds were found to exhibit moderate to good antimicrobial activity.

Pavani K.,Sri Venakateswara University | Kumar J.S.,Sri Venakateswara University | Sasikala T.,Sri Venakateswara University | Jamalaiah B.C.,Pukyong National University | And 2 more authors.
Materials Chemistry and Physics | Year: 2011

Dy3+ doped strontium magnesium aluminate (SMA) phosphors were synthesized by solid state reaction method with different calcination temperatures. Structural details of the phosphors were explored by the XRD measurement and the functional groups present in the phosphors were examined by Fourier transform infrared (FTIR) spectroscopy. The luminescent properties of SMA:Dy3+ phosphor were investigated from the excitation and emission spectra. The phosphors calcined at 1350 °C show high intense emission with bright white light which in turn confirmed by the evaluated CIE color coordinates. © 2011 Elsevier B.V.

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