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Articles by Sankara Sabapathy Pandiarajan
Total Records ( 4 ) for Sankara Sabapathy Pandiarajan
  Chandran Muthuselvi , Murugesan Pandeeswari and Sankara Sabapathy Pandiarajan
  Objective: The main objective of the present work was to grow 4-carboxyanilinium nitrate C7H8NO2+. NO3‾ semi-organic crystal by slow evaporation method and analyzed by various techniques. The positively charged carboxyanilinium cation and nitrate anion were existing in this crystal structure. Materials and Methods: 4-aminobenzoic acid, nitric acid, ethanol and deionized water were used in the crystal growth process as the raw materials. The semi-organic crystal of 4-carboxyanilinium nitrate is crystallized from the aqueous ethanol solution of 4-aminobenzoic acid mixed with aqueous solution of nitric acid in 2:1 stoichiometric ratio by slow evaporation technique. Results: The crystal lattice parameters and space group was obtained from the single crystal XRD study. The powder X-ray diffraction peaks were indexed using the INDX software. The FTIR and FT-Raman spectra of 4-carboxyanilinium nitrate crystal had been recorded at room temperature. The spectra were interpreted in terms of the wavenumber assignments. The SEM analysis shows that the complex crystal has smooth surface and well defined shape morphology. The optical band gap was determined from the UV-Visible spectroscopy analysis. Conclusion: The unit cell parameters and space group were estimated by single crystal X-ray diffraction technique. The average crystalline size of grown crystal is found to be as 72 nm. Further, the presence of functional groups and elements were verified using FTIR and FT-Raman spectroscopy and energy dispersive X-ray studies. Also, the optical band gap of title crystal is determined as 3.90 eV. The grown crystals were involved in an antibacterial activity against certain potentially threatening microbes which shows that the complex crystal screened the bacteria than that of the parent crystal.
  Chandran Muthuselvi , Sankara Sabapathy Pandiarajan , Bhagatsingh Ravikumar , Shunmuganarayanan Athimoolam and Rajaputi Venkatraman Krishnakumar
  Background and Objective: The crystal structure of 7’-Nitro-6’-phenyl-1’,6’,7’,7a’-tetrahydro-spiro[indeno[1,2-b]quinoxaline-11,5’-pyrrolo[1,2-c][1,3]thiazole](NPTSIPT) crystal was recently reported by authors group. The main objective of the present study was to analyze the vibrational spectra of title compound. So it was crystallized by slow evaporation method and characterized by the single crystal XRD, FT-IR, FT-Raman and UV-Visible spectroscopy analysis. Materials and Methods: The raw materials used for this crystallization are benzene-1, 2-diamine, 1H-indene-1, 2, 3-trione, thiazolidine-4-carboxylic acid, methanol, chloroform and trans-β-nitro styrene which were purchased from Sigma Aldrich Company through local scientific companies in Tamil Nadu, India. The crystals were obtained by the slow evaporation method using the chloroform as a solvent. Results: Using X-ray diffractometer, the unit cell parameters and space group of title crystal was obtained. The FT-IR and FT-Raman spectroscopic techniques have been used to identify the vibrational modes of compound. The optical property was analyzed by UV-Visible spectroscopy. Conclusion: The single crystal XRD study revealed that the title compound belongs to triclinic crystal system with centro symmetric space group P1̄. The vibrational spectra have been investigated by FT-IR, FT- Raman spectroscopic techniques to elucidate the various functional groups present in the molecule. The optical property was analyzed by UV-Visible spectroscopy which showed that the grown crystal has high transparency in the entire visible region. Due to the wide variety of biomedical applications in biological and pharmaceutical fields, the modified quinoxaline structure of title compound is considered for study in this present research.
  Chandran Muthuselvi , Sankara Sabapathy Pandiarajan , Bagathsingh Ravikumar , Shunmuganarayanan Athimoolam and Rajaputi Venkatraman Krishnakumar
  Background and Objective: Quinoxaline derivatives shown antibacterial, antiviral and anticancer properties which have received considerable interest due to their biological properties. Thus the halogen substituted indeno quinoxaline derivative hetero cyclic compound of 6’-(3-bromo phenyl)-7’-nitro-1’, 6’, 7’, 7a’-tetrahydro-3’ H-spiro[indeno[1, 2-b]quinoxaline-11, 5’-pyrrolo[1,2-c]thiazole] (BPNTSIPT) has been crystallized by slow evaporation method and characterized by FT-IR, FT-Raman and UV-Visible spectroscopy analyzes. Materials and Methods: Colourless block shaped crystals were obtained from slow evaporation method by recrystallization of synthesized compound with ethanolic solution. Benzene-1, 2-diamine, 1H-indene-1, 2, 3-trione, thiazolidine-4-carboxylic acid, methanol, chloroform and trans-β-bromo nitrostyrenes are the raw materials used for this crystallization. Results: The complete vibrational FT-IR and FT-Raman spectra were interpreted in terms of functional group wavenumbers. The optical property of the title compound was analyzed by UV-Visible spectroscopy study. The crystal has the maximum absorbance peaks at 267, 347 and 369 nm. Conclusion: The FT-IR and FT-Raman spectra were studied and the functional group assignments of title compound have been seen to be in good agreement with the corresponding results in the literature. The title crystal has 4.3 eV optical band gap, this showed that it is a predictable dielectric material. Due to the wide variety of biomedical applications of modified quinoxaline structure in biological and pharmaceutical fields, it was taken to study and analyzed in this present work.
  Chandran Muthuselvi , Sankara Sabapathy Pandiarajan , Bhagatsingh Ravikumar , Shunmuganarayanan Athimoolam , Navaneethakrishnan Srinivasan and Rajaputi Venkatraman Krishnakumar
  Background and Objective: The single crystal of ethyl 6'-cyano-7'-phenyl-1',6',7',7a' tetrahydro-3'H-spiro[indeno[1,2-b] quinoxaline-11,5'-pyrrolo [1,2-c] thiazole-6'-carboxylate (ECPTSIPTC) was crystallized by slow evaporation method after synthesis of compound. The main objective of the present study was to analyze complete vibration spectra of ECPTSIPTC compound through the FT-IR and FT-Raman techniques. Materials and Methods: Indeno quinoxaline, thioproline, ethyl cyano acetate, benzaldehyde, ethyl acetate and chloroform were used to grow the single crystal of title compound which were purchased from Sigma Aldrich company through local scientific companies in Tamil Nadu, India. The slow evaporation technique was employed to grow needle shaped ECPTSIPTC crystal using the chloroform as a solvent. Results: The vibrational spectra were recorded at room temperature using the FT-IR and FT-Raman spectrometers in the wavelength range 4000-400 cm–1. The optical property was performed by double beam spectrophotometer in the wavelength range 200-1100 nm. Conclusion: The FT-IR, FT-Raman vibrational spectral studies confirmed the various functional groups present in the title compound. The optical property of the title compound shows that the grown crystal has high transparency in the entire visible region and the energy gap was found to as 4.8 eV. Due to the wide applications of title compound in biological and pharmaceutical fields, it was considered for study in this present work.
 
 
 
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