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Articles by A.K. Ziyada
Total Records ( 2 ) for A.K. Ziyada
  A.K. Ziyada , Z. Man , T. Murugesan , M.A. Bustam and C.D. Wilfred
  In this study, trihexyltetradecylphosphonium octylsulfosuccinate [P6,6,6,14][docusate] was synthesised by anion metathesis using sodium octylsulfosuccinate salt. The molecular structure of the synthesised IL was confirmed by using 1H NMR and elemental analysis and also physical properties such as density, viscosity and refractive index were studied as a function of temperature at the atmospheric pressure. The experimental values of density and refractive index decrease linearly with increasing temperature. The density, refractive index and viscosity of the present IL at 298.15 K are 0.9631 g cm-3, 1.47190 and 1806.1 mPa.s respectively. The results show that this IL possesses higher viscosity, similar density and refractive index compared to the other trihexyltetradecylphosphonium ILs.
  A.K. Ziyada , C.D. Wilfred and M.A. Bustam
  In the present study, a novel phosphonium-based Dicationic Ionic Liquids (DCILs) were synthesized and characterized using 1H NMR and elemental analysis. Physiochemical properties such as density and viscosity are measured and reported for a temperature range of 293.15 to 353.15 K while the refractive index was measured in the range of 293.15 to 333.15 K. The start and decomposition temperatures are determined at heating rate 10°C min-1. The influence of the spacer alkyl chain on these properties is discussed. The results show that the new DCILs possess lower density higher thermal stability and higher viscosity compare to monocationic ionic liquids.
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