Alosious Gonsago - Academia.edu (original) (raw)

Papers by Alosious Gonsago

Single crystals of Urea family such as Urea L-malate and Zn(II) incorporated Urea L-malate were s... more Single crystals of Urea family such as Urea L-malate and Zn(II) incorporated Urea L-malate were synthesized and grown by slow solvent evaporation method in aqueous solution at an ambient temperature. Effect of metal dopant Zn(II) on physicochemical properties of Urea L-malate crystal has been studied. Crystal structure was analyzed by powder and single crystal X-ray diffraction techniques which indicate that both the pure and Zn(II) doped Urea Lmalate crystals are of monoclinic crystal system with P2 space group. Optical transmittance analysis was carried out to identify the optical behaviour of the grown crystals. It has been observed that the transmittance is adequate for both the crystals in the UV and visible regions. Kurtz powder method has been employed to find out the second harmonic generation efficiency of the grown crystals. The thermal decomposition and purity of the samples were studied by thermogravimetry and differential scanning calorimetry techniques. Dielectric natu...

An organic nonlinear optical single crystal of 2,6-diaminopyridinium paranitrophenolateparanitrop... more An organic nonlinear optical single crystal of 2,6-diaminopyridinium paranitrophenolateparanitrophenol has been grown in the mixed solvent using slow solvent evaporation method at room temperature. For the structural and crystalline analysis, the grown crystal was subjected to single crystal X-ray diffraction, FT-IR and Raman spectral studies. Factor groups were identified and analyzed for the confirmation of IR and Raman active modes of vibrations. Optical absorbance spectrum in the wavelength range 400 to 800nm has been recorded for the grown crystal which designates the lower cutoff occurs at around 452 nm. Photoluminescence studies were carried out to study the optical emission characteristics. Mechanical behavior of the grown crystal has been studied using Vicker’smicrohardness tester. The dielectric permittivity, dielectric loss and ac conductivity at room temperature were also investigated using LCR meter. The second harmonic generation efficiency was confirmed by KurtzPerry ...

A semi-organic nonlinear crystal L-histidine methyl ester dihydrochloride, an analog of L-histidi... more A semi-organic nonlinear crystal L-histidine methyl ester dihydrochloride, an analog of L-histidine has been grown successfully by slow evaporation solution growth method at room temperature. The grown crystal was characterized by crystalXRD and FT-NMR studies. The optical transmittance of the grown crystalwas analyzed byUV–vis–NIR spectral study which shows that the crystal has a wide transmittance windowin the entire visible region. The surface morphology of the grown crystal was analyzed by HR-SEM analysis. The second harmonic generation of the grown crystal was tested by the powder technique of Kurtz and Perry. The thermal stability of the crystal was ascertained by differential scanning calorimetry (DSC) technique. The Vickers microhardness test was performed and the load dependence hardness was estimated.

Crystall ization and Characterization of L-Histidinium Succinate Monohydrate (LHS), A Novel Organ... more Crystall ization and Characterization of L-Histidinium Succinate Monohydrate (LHS), A Novel Organic NLO Material C ALOSIOUS GONSAGO1, H M ALBERT2, R UMAMAHESWARI2, P MALLIGA 2 and A JOSEPH ARUL PRAGASAM2* 1Department of Physics, Mohamed Sathak A J College of Engineering, Old Mahabalipuram Road, Chennai 603 103, India 2Department of Physics, Sathyabama University, Rajiv Gandhi Road, Chennai 600 119, India

Indian journal of applied research, 2021

The inuence of annealing temperature on the structural, morphological, and optical properties of... more The inuence of annealing temperature on the structural, morphological, and optical properties of SnO thin lms 2 prepared by spin-coating method has been studied. The samples were thermally annealed at 673 K and 773 K for 2 hrs. Powder XRD analysis of the thin lms annealed at 673 and 773 K shows less intense and broad diffraction peaks. The size of the grains found to increase with annealing temperature. The grain size of the synthesized lm is enhanced due to increasing annealing temperature upto 773 K. The grains are well agglomerated for lms annealed at the higher temperature of 773 K. The transmission spectra of SnO thin lms annealed at the 2 temperatures of 673 and 773 K was analyzed. The percentage of transmittance found to increase from 56 to 91% with an increase in the annealing temperature from room temperature to 773 K. The bandgap energy value (Eg) was calculated and it increases from 3.25 to 3.35 eV with the increase in annealing temperatures.

L-histidinium maleate, a new amino acid organic nonlinear optical material has been successfully ... more L-histidinium maleate, a new amino acid organic nonlinear optical material has been successfully grown from aqueous solution by slow solvent evaporation method. The grown crystal was subjected to single crystal X-ray diffraction study for the identification of the structural arrangement. The chemical composition of the grown crystal was estimated by Energy dispersive X-ray analysis. In order to confirm the molecular structure of the grown crystal, FT-NMR spectral analysis was carried out. The percentage of optical transmittance by the grown crystal was ascertained by UV-visible spectral study. The nonlinear optical property of the grown material was identified by the powder technique of Kurtz and Perry. The HR-SEM analysis shows the surface morphology of the grown crystal. The thermal stability of the grown crystal was found by differential thermal analysis.

An organic nonlinear optical single crystal of 2,6-Diaminopyridinium paranitrophenolate paranitro... more An organic nonlinear optical single crystal of 2,6-Diaminopyridinium paranitrophenolate paranitrophenol has been grown in the mixed solvent using slow solvent evaporation method at room temperature. For the structural and crystalline analysis, the grown crystal was subjected to single crystal X-ray diffraction, FT-IR and Raman spectral studies. Factor groups were identified and analyzed for the confirmation of IR and Raman active modes of vibrations. Optical absorbance spectrum in the wavelength range 400 to 800 nm has been recorded for the grown crystal which designates the lower cutoff occurs at around 452 nm. Photoluminescence studies were carried out to study the optical emission characteristics. Mechanical behavior of the grown crystal has been studied using Vicker’s microhardness tester. The dielectric permittivity, dielectric loss and ac conductivity at room temperature were also investigated using LCR meter.

Journal of chemical and pharmaceutical research, 2015

An organic nonlinear optical single crystal of L-histidinium glutarate monohydrate (LHG), has bee... more An organic nonlinear optical single crystal of L-histidinium glutarate monohydrate (LHG), has been synthesized by slow solvent evaporation method at an ambient temperature. Single crystal X-ray diffraction technique was employed to find the structure of the grown compound. The elemental composition of the compound was confirmed by Energy dispersive X-ray analysis. Molecular structure of LHG was established by proton NMR and carbon NMR spectral studies. The optical absorption coefficient α was analyzed from the UV spectral analysis and the optical band gap of the compound was estimated. The nonlinear optical property was confirmed by the powder technique of Kurtz and Perry.

The crystalline material of Glycyl-LAlanine (GLA) was synthesized and the single crystals of the ... more The crystalline material of Glycyl-LAlanine (GLA) was synthesized and the single crystals of the title compound grown by slow evaporation solution growth technique. The powder was characterized through XRD and FTIR techniques. EDAX studies indicated the presence of elements in the grown GLAcrystals. The UV-Vis- NIR spectral studies were carried out to analyze the optical absorption of the grown crystals and was found that the absorption is very low in the wavelength region between 250- 1000nm. The thermal stability of the crystals was studied using TG/DTA analyses techniques. The second harmonic generation (SHG) of the material was confirmed by using Nd:YAG laser. The dielectric constant and dielectric loss of the grown crystal was measured.

Research Trends and Challenges in Physical Science Vol. 2

Current Approaches in Science and Technology Research Vol. 13

Indian Journal of Science and Technology

Research article "Urea-doped L-histidine crystals" C.A.Gonsago et al. Indian Society for Educati... more Research article "Urea-doped L-histidine crystals" C.A.Gonsago et al. Indian Society for Education and Environment (iSee) http://www.indjst.org Indian J.Sci.Technol.

International Journal on Applied Bio-Engineering, 2011

Journal of Thermal Analysis and Calorimetry, 2014

L-histidinium glutarate monohydrate, an organic nonlinear optical crystal has been successfully g... more L-histidinium glutarate monohydrate, an organic nonlinear optical crystal has been successfully grown from deionized water by slow solvent evaporation method at room temperature. Crystal structure and its lattice parameters were identified by single-crystal X-ray diffraction technique. Crystalline perfection of the grown crystal was studied by high-resolution X-ray diffraction rocking curve measurements by employing a multicrystal X-ray diffractometer. FT-IR and FT-Raman spectral studies were employed to identify the presence of various functional groups and mode of vibrations in the crystal. Thermal behavior of the crystal was studied by TG-DTA, TG-DTG, and DSC analyses. Optical absorption of the crystal in the wavelength region 200-1,000 nm was studied by UV-Vis-NIR spectral analysis. Kurtz and Perry powder technique was employed to find the second harmonic generation efficiency of the crystal.

Indian Journal of Applied Research, 2011

Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010), 2010

ABSTRACT

International Journal of Applied Physics and Mathematics, 2012

A new amino acid organic nonlinear optical material L-histidinium maleate (LHM), has been synthes... more A new amino acid organic nonlinear optical material L-histidinium maleate (LHM), has been synthesized and successfully grown from aqueous solution by slow solvent evaporation method at room temperature. The solubility of the compound was measured in aqueous solution at different temperatures. The grown crystal was subjected to single crystal XRD and powder XRD studies in order to identify the structural arrangement. The chemical composition of the grown crystal was confirmed by Energy dispersive X-ray analysis (EDAX). The percentage of optical transmittance by the grown crystal was identified by UV-visible spectral study. The nonlinear optical property of the grown material was identified by the powder technique of Kurtz and Perry. The HR-SEM analysis shows the surface morphology of the grown crystal. The thermal stability of the grown crystal was found by differential thermal analysis and differential scanning calorimetry.

Materials Research Bulletin, 2012

ABSTRACT A new organic nonlinear optical material l-histidinium maleate 1.5-hydrate (LHM) with th... more ABSTRACT A new organic nonlinear optical material l-histidinium maleate 1.5-hydrate (LHM) with the molecular formula C10H16N3O7.5 has been successfully synthesized from aqueous solution by slow solvent evaporation method. The structural characterization of the grown crystal was carried out by single crystal X-ray diffraction at 293(2) K. In the crystal, molecules are linked through inter and intramolecular NH⋯O and OH⋯O hydrogen bonds, generate edge fused ring motif. The hydrogen bonded motifs are linked to each other to form a three dimensional network. The FT-IR spectroscopy was used to identify the functional groups of the synthesized compound. The optical behavior of the grown crystal was examined by UV–visible spectral analysis, which shows that the optical absorption is almost negligible in the wavelength range 280–1300 nm. The nonlinear optical property was confirmed by the powder technique of Kurtz and Perry. The thermal behavior of the grown crystal was analyzed by thermogravimetric analysis.

Materials and Manufacturing Processes, 2012

... A. Joseph Arul Pragasam b * pages 355-359. ... Pragasam , A. ; Selvakumar , S. ; Thamizharasa... more ... A. Joseph Arul Pragasam b * pages 355-359. ... Pragasam , A. ; Selvakumar , S. ; Thamizharasan , K. ; Prem Anand , D. ; Sagayaraj , P. Growth and optical characterization of Cu-and Mg-substituted L-arginine di phosphate single crystals . J. Cryst. Growth 2005 , 280 , 271 – 278 . ...

Journal of Thermal Analysis and Calorimetry, 2014

ABSTRACT

Single crystals of Urea family such as Urea L-malate and Zn(II) incorporated Urea L-malate were s... more Single crystals of Urea family such as Urea L-malate and Zn(II) incorporated Urea L-malate were synthesized and grown by slow solvent evaporation method in aqueous solution at an ambient temperature. Effect of metal dopant Zn(II) on physicochemical properties of Urea L-malate crystal has been studied. Crystal structure was analyzed by powder and single crystal X-ray diffraction techniques which indicate that both the pure and Zn(II) doped Urea Lmalate crystals are of monoclinic crystal system with P2 space group. Optical transmittance analysis was carried out to identify the optical behaviour of the grown crystals. It has been observed that the transmittance is adequate for both the crystals in the UV and visible regions. Kurtz powder method has been employed to find out the second harmonic generation efficiency of the grown crystals. The thermal decomposition and purity of the samples were studied by thermogravimetry and differential scanning calorimetry techniques. Dielectric natu...

An organic nonlinear optical single crystal of 2,6-diaminopyridinium paranitrophenolateparanitrop... more An organic nonlinear optical single crystal of 2,6-diaminopyridinium paranitrophenolateparanitrophenol has been grown in the mixed solvent using slow solvent evaporation method at room temperature. For the structural and crystalline analysis, the grown crystal was subjected to single crystal X-ray diffraction, FT-IR and Raman spectral studies. Factor groups were identified and analyzed for the confirmation of IR and Raman active modes of vibrations. Optical absorbance spectrum in the wavelength range 400 to 800nm has been recorded for the grown crystal which designates the lower cutoff occurs at around 452 nm. Photoluminescence studies were carried out to study the optical emission characteristics. Mechanical behavior of the grown crystal has been studied using Vicker’smicrohardness tester. The dielectric permittivity, dielectric loss and ac conductivity at room temperature were also investigated using LCR meter. The second harmonic generation efficiency was confirmed by KurtzPerry ...

A semi-organic nonlinear crystal L-histidine methyl ester dihydrochloride, an analog of L-histidi... more A semi-organic nonlinear crystal L-histidine methyl ester dihydrochloride, an analog of L-histidine has been grown successfully by slow evaporation solution growth method at room temperature. The grown crystal was characterized by crystalXRD and FT-NMR studies. The optical transmittance of the grown crystalwas analyzed byUV–vis–NIR spectral study which shows that the crystal has a wide transmittance windowin the entire visible region. The surface morphology of the grown crystal was analyzed by HR-SEM analysis. The second harmonic generation of the grown crystal was tested by the powder technique of Kurtz and Perry. The thermal stability of the crystal was ascertained by differential scanning calorimetry (DSC) technique. The Vickers microhardness test was performed and the load dependence hardness was estimated.

Crystall ization and Characterization of L-Histidinium Succinate Monohydrate (LHS), A Novel Organ... more Crystall ization and Characterization of L-Histidinium Succinate Monohydrate (LHS), A Novel Organic NLO Material C ALOSIOUS GONSAGO1, H M ALBERT2, R UMAMAHESWARI2, P MALLIGA 2 and A JOSEPH ARUL PRAGASAM2* 1Department of Physics, Mohamed Sathak A J College of Engineering, Old Mahabalipuram Road, Chennai 603 103, India 2Department of Physics, Sathyabama University, Rajiv Gandhi Road, Chennai 600 119, India

Indian journal of applied research, 2021

The inuence of annealing temperature on the structural, morphological, and optical properties of... more The inuence of annealing temperature on the structural, morphological, and optical properties of SnO thin lms 2 prepared by spin-coating method has been studied. The samples were thermally annealed at 673 K and 773 K for 2 hrs. Powder XRD analysis of the thin lms annealed at 673 and 773 K shows less intense and broad diffraction peaks. The size of the grains found to increase with annealing temperature. The grain size of the synthesized lm is enhanced due to increasing annealing temperature upto 773 K. The grains are well agglomerated for lms annealed at the higher temperature of 773 K. The transmission spectra of SnO thin lms annealed at the 2 temperatures of 673 and 773 K was analyzed. The percentage of transmittance found to increase from 56 to 91% with an increase in the annealing temperature from room temperature to 773 K. The bandgap energy value (Eg) was calculated and it increases from 3.25 to 3.35 eV with the increase in annealing temperatures.

L-histidinium maleate, a new amino acid organic nonlinear optical material has been successfully ... more L-histidinium maleate, a new amino acid organic nonlinear optical material has been successfully grown from aqueous solution by slow solvent evaporation method. The grown crystal was subjected to single crystal X-ray diffraction study for the identification of the structural arrangement. The chemical composition of the grown crystal was estimated by Energy dispersive X-ray analysis. In order to confirm the molecular structure of the grown crystal, FT-NMR spectral analysis was carried out. The percentage of optical transmittance by the grown crystal was ascertained by UV-visible spectral study. The nonlinear optical property of the grown material was identified by the powder technique of Kurtz and Perry. The HR-SEM analysis shows the surface morphology of the grown crystal. The thermal stability of the grown crystal was found by differential thermal analysis.

An organic nonlinear optical single crystal of 2,6-Diaminopyridinium paranitrophenolate paranitro... more An organic nonlinear optical single crystal of 2,6-Diaminopyridinium paranitrophenolate paranitrophenol has been grown in the mixed solvent using slow solvent evaporation method at room temperature. For the structural and crystalline analysis, the grown crystal was subjected to single crystal X-ray diffraction, FT-IR and Raman spectral studies. Factor groups were identified and analyzed for the confirmation of IR and Raman active modes of vibrations. Optical absorbance spectrum in the wavelength range 400 to 800 nm has been recorded for the grown crystal which designates the lower cutoff occurs at around 452 nm. Photoluminescence studies were carried out to study the optical emission characteristics. Mechanical behavior of the grown crystal has been studied using Vicker’s microhardness tester. The dielectric permittivity, dielectric loss and ac conductivity at room temperature were also investigated using LCR meter.

Journal of chemical and pharmaceutical research, 2015

An organic nonlinear optical single crystal of L-histidinium glutarate monohydrate (LHG), has bee... more An organic nonlinear optical single crystal of L-histidinium glutarate monohydrate (LHG), has been synthesized by slow solvent evaporation method at an ambient temperature. Single crystal X-ray diffraction technique was employed to find the structure of the grown compound. The elemental composition of the compound was confirmed by Energy dispersive X-ray analysis. Molecular structure of LHG was established by proton NMR and carbon NMR spectral studies. The optical absorption coefficient α was analyzed from the UV spectral analysis and the optical band gap of the compound was estimated. The nonlinear optical property was confirmed by the powder technique of Kurtz and Perry.

The crystalline material of Glycyl-LAlanine (GLA) was synthesized and the single crystals of the ... more The crystalline material of Glycyl-LAlanine (GLA) was synthesized and the single crystals of the title compound grown by slow evaporation solution growth technique. The powder was characterized through XRD and FTIR techniques. EDAX studies indicated the presence of elements in the grown GLAcrystals. The UV-Vis- NIR spectral studies were carried out to analyze the optical absorption of the grown crystals and was found that the absorption is very low in the wavelength region between 250- 1000nm. The thermal stability of the crystals was studied using TG/DTA analyses techniques. The second harmonic generation (SHG) of the material was confirmed by using Nd:YAG laser. The dielectric constant and dielectric loss of the grown crystal was measured.

Research Trends and Challenges in Physical Science Vol. 2

Current Approaches in Science and Technology Research Vol. 13

Indian Journal of Science and Technology

Research article "Urea-doped L-histidine crystals" C.A.Gonsago et al. Indian Society for Educati... more Research article "Urea-doped L-histidine crystals" C.A.Gonsago et al. Indian Society for Education and Environment (iSee) http://www.indjst.org Indian J.Sci.Technol.

International Journal on Applied Bio-Engineering, 2011

Journal of Thermal Analysis and Calorimetry, 2014

L-histidinium glutarate monohydrate, an organic nonlinear optical crystal has been successfully g... more L-histidinium glutarate monohydrate, an organic nonlinear optical crystal has been successfully grown from deionized water by slow solvent evaporation method at room temperature. Crystal structure and its lattice parameters were identified by single-crystal X-ray diffraction technique. Crystalline perfection of the grown crystal was studied by high-resolution X-ray diffraction rocking curve measurements by employing a multicrystal X-ray diffractometer. FT-IR and FT-Raman spectral studies were employed to identify the presence of various functional groups and mode of vibrations in the crystal. Thermal behavior of the crystal was studied by TG-DTA, TG-DTG, and DSC analyses. Optical absorption of the crystal in the wavelength region 200-1,000 nm was studied by UV-Vis-NIR spectral analysis. Kurtz and Perry powder technique was employed to find the second harmonic generation efficiency of the crystal.

Indian Journal of Applied Research, 2011

Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010), 2010

ABSTRACT

International Journal of Applied Physics and Mathematics, 2012

A new amino acid organic nonlinear optical material L-histidinium maleate (LHM), has been synthes... more A new amino acid organic nonlinear optical material L-histidinium maleate (LHM), has been synthesized and successfully grown from aqueous solution by slow solvent evaporation method at room temperature. The solubility of the compound was measured in aqueous solution at different temperatures. The grown crystal was subjected to single crystal XRD and powder XRD studies in order to identify the structural arrangement. The chemical composition of the grown crystal was confirmed by Energy dispersive X-ray analysis (EDAX). The percentage of optical transmittance by the grown crystal was identified by UV-visible spectral study. The nonlinear optical property of the grown material was identified by the powder technique of Kurtz and Perry. The HR-SEM analysis shows the surface morphology of the grown crystal. The thermal stability of the grown crystal was found by differential thermal analysis and differential scanning calorimetry.

Materials Research Bulletin, 2012

ABSTRACT A new organic nonlinear optical material l-histidinium maleate 1.5-hydrate (LHM) with th... more ABSTRACT A new organic nonlinear optical material l-histidinium maleate 1.5-hydrate (LHM) with the molecular formula C10H16N3O7.5 has been successfully synthesized from aqueous solution by slow solvent evaporation method. The structural characterization of the grown crystal was carried out by single crystal X-ray diffraction at 293(2) K. In the crystal, molecules are linked through inter and intramolecular NH⋯O and OH⋯O hydrogen bonds, generate edge fused ring motif. The hydrogen bonded motifs are linked to each other to form a three dimensional network. The FT-IR spectroscopy was used to identify the functional groups of the synthesized compound. The optical behavior of the grown crystal was examined by UV–visible spectral analysis, which shows that the optical absorption is almost negligible in the wavelength range 280–1300 nm. The nonlinear optical property was confirmed by the powder technique of Kurtz and Perry. The thermal behavior of the grown crystal was analyzed by thermogravimetric analysis.

Materials and Manufacturing Processes, 2012

... A. Joseph Arul Pragasam b * pages 355-359. ... Pragasam , A. ; Selvakumar , S. ; Thamizharasa... more ... A. Joseph Arul Pragasam b * pages 355-359. ... Pragasam , A. ; Selvakumar , S. ; Thamizharasan , K. ; Prem Anand , D. ; Sagayaraj , P. Growth and optical characterization of Cu-and Mg-substituted L-arginine di phosphate single crystals . J. Cryst. Growth 2005 , 280 , 271 – 278 . ...

Journal of Thermal Analysis and Calorimetry, 2014

ABSTRACT