ABSTRACT Polarized reflection spectra and the kramers-kroning transformed absoption spectra of th... more ABSTRACT Polarized reflection spectra and the kramers-kroning transformed absoption spectra of the crystalline picolylricyanoquinodimethane (P3CNQ) are presented. Observance of an intermolecular CT transition at 12400 cm-, besides an intramolecular CT excitaion at 18600 cm , has been reported for this homo-molecular crystal. On different crystalline foaces occurrence of the same IRCT band at an energy separation of the order of thousands of wave number has been explained in the light of the excition energy shift. For both the IRCT and INCT transitions, band energies, oscillator strengths etc. are calcualated in view of the compostie molecule model. Am important emphasis is paid to the CT transition that takes place intermolecularly.
Http Dx Doi Org 10 1080 00319100601100930, Apr 1, 2008
... 46, No. 2, April 2008, 140153 Density, viscosity and thermodynamics for viscous flow of wate... more ... 46, No. 2, April 2008, 140153 Density, viscosity and thermodynamics for viscous flow of water+1,2-dimethoxyethane MUHAMMAD A. SALEH*, SHAMIM AKHTAR and M. SHAMSUDDINAHMED Department of Chemistry, University of Chittagong, Chittagong-4331, Bangladesh ...
Http Dx Doi Org 10 1080 00319100500130194, Aug 19, 2006
Densities and viscosities for the system, water (W) þ ethylenecarbonate (EC), have been deter-min... more Densities and viscosities for the system, water (W) þ ethylenecarbonate (EC), have been deter-mined for the entire range of composition at temperatures ranging from 313.15 to 333.15K. Density, excess molar volume, viscosity, excess viscosity and thermodynamic ...
Http Dx Doi Org 10 1080 00319100600647691, Jan 31, 2007
The thermodynamic activation parameters, enthalpies, Δ H≠, free energies, Δ G≠, and entropies, Δ ... more The thermodynamic activation parameters, enthalpies, Δ H≠, free energies, Δ G≠, and entropies, Δ S≠, for viscous flow of the systems, water (W)+ n-butylamine (NBA), W+ sec-butylamine (SBA) and W+ tert-butylamine (TBA), have been determined by using the ...
Page 1. Phys. Chem. Liq., 2002, Vol. 40(4), pp. 435448 VISCOSITY AND THERMODYNAMICS OF VISCOUS F... more Page 1. Phys. Chem. Liq., 2002, Vol. 40(4), pp. 435448 VISCOSITY AND THERMODYNAMICS OF VISCOUS FLOW FOR THE SYSTEMS OF ISOMERIC PENTANOLS WITH TOLUENE SHAMIMAKHTAR*, KAYES MS HOSSAIN and MUHAMMAD A. SALEH ...
Physical and chemical properties of solvent mixtures are important for understanding their thermo... more Physical and chemical properties of solvent mixtures are important for understanding their thermodynamic behavior. One of the most important considerations is that these properties may provide information about molecular interactions [1]. Excess molar volumes, viscosity deviations and excess molar Gibbs energy of activation of viscous flow in 1,2-dimethoxyethane + water binary mixtures at (303.15, 308.15, 313.15, 318.15 and 323.15) K. were calculated from experimental density and viscosity data presented in previous work [2]. Here these experimental values were used to test the applicability of the correlative reduced Redlich-Kister equation and the Herráez and Belda equations as well as their corresponding relative properties. Their correlation ability at different temperatures, and the use of appropriate numbers of parameters, is discussed for the case of limited experimental data. The relative functions are important to reduce the effect of temperature and, consequently, to revea...
ABSTRACT Polarized reflection spectra and the kramers-kroning transformed absoption spectra of th... more ABSTRACT Polarized reflection spectra and the kramers-kroning transformed absoption spectra of the crystalline picolylricyanoquinodimethane (P3CNQ) are presented. Observance of an intermolecular CT transition at 12400 cm-, besides an intramolecular CT excitaion at 18600 cm , has been reported for this homo-molecular crystal. On different crystalline foaces occurrence of the same IRCT band at an energy separation of the order of thousands of wave number has been explained in the light of the excition energy shift. For both the IRCT and INCT transitions, band energies, oscillator strengths etc. are calcualated in view of the compostie molecule model. Am important emphasis is paid to the CT transition that takes place intermolecularly.
Http Dx Doi Org 10 1080 00319100601100930, Apr 1, 2008
... 46, No. 2, April 2008, 140153 Density, viscosity and thermodynamics for viscous flow of wate... more ... 46, No. 2, April 2008, 140153 Density, viscosity and thermodynamics for viscous flow of water+1,2-dimethoxyethane MUHAMMAD A. SALEH*, SHAMIM AKHTAR and M. SHAMSUDDINAHMED Department of Chemistry, University of Chittagong, Chittagong-4331, Bangladesh ...
Http Dx Doi Org 10 1080 00319100500130194, Aug 19, 2006
Densities and viscosities for the system, water (W) þ ethylenecarbonate (EC), have been deter-min... more Densities and viscosities for the system, water (W) þ ethylenecarbonate (EC), have been deter-mined for the entire range of composition at temperatures ranging from 313.15 to 333.15K. Density, excess molar volume, viscosity, excess viscosity and thermodynamic ...
Http Dx Doi Org 10 1080 00319100600647691, Jan 31, 2007
The thermodynamic activation parameters, enthalpies, Δ H≠, free energies, Δ G≠, and entropies, Δ ... more The thermodynamic activation parameters, enthalpies, Δ H≠, free energies, Δ G≠, and entropies, Δ S≠, for viscous flow of the systems, water (W)+ n-butylamine (NBA), W+ sec-butylamine (SBA) and W+ tert-butylamine (TBA), have been determined by using the ...
Page 1. Phys. Chem. Liq., 2002, Vol. 40(4), pp. 435448 VISCOSITY AND THERMODYNAMICS OF VISCOUS F... more Page 1. Phys. Chem. Liq., 2002, Vol. 40(4), pp. 435448 VISCOSITY AND THERMODYNAMICS OF VISCOUS FLOW FOR THE SYSTEMS OF ISOMERIC PENTANOLS WITH TOLUENE SHAMIMAKHTAR*, KAYES MS HOSSAIN and MUHAMMAD A. SALEH ...
Physical and chemical properties of solvent mixtures are important for understanding their thermo... more Physical and chemical properties of solvent mixtures are important for understanding their thermodynamic behavior. One of the most important considerations is that these properties may provide information about molecular interactions [1]. Excess molar volumes, viscosity deviations and excess molar Gibbs energy of activation of viscous flow in 1,2-dimethoxyethane + water binary mixtures at (303.15, 308.15, 313.15, 318.15 and 323.15) K. were calculated from experimental density and viscosity data presented in previous work [2]. Here these experimental values were used to test the applicability of the correlative reduced Redlich-Kister equation and the Herráez and Belda equations as well as their corresponding relative properties. Their correlation ability at different temperatures, and the use of appropriate numbers of parameters, is discussed for the case of limited experimental data. The relative functions are important to reduce the effect of temperature and, consequently, to revea...
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