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Articles by Sankara Sabapathy Pandiarajan
Total Records ( 2 ) for Sankara Sabapathy Pandiarajan
  Chandran Muthuselvi , Arulanandam Shagaya Princy and Sankara Sabapathy Pandiarajan
  Background and Objective: The crystal structure of title compound (4-Carboxyanilinium Dihydrogen Phosphate) was already reported. But in the best of the knowledge, there is no report on spectroscopy and antimicrobial activity studies of this compound. So objective of study was to grow the 4-carboxyanilinium dihydrogen phosphate complex crystal from slow evaporation technique and characterized by single crystal XRD, powder XRD, FTIR, FT-Raman, UV-Visible spectroscopy, SEM with EDX and antimicrobial activity studies. Materials and Methods: The title crystal (4-Carboxyanilinium Dihydrogen Phosphate Semi-Organic Complex Crystal) was obtained by slow evaporation technique from the aqueous ethanol solution of 4-aminobenzoic acid and orthophosphoric acid in 1:1 stoichiometric ratio. In this crystal growth process, 4-aminobenzoic acid, orthophosphoric acid, ethanol and deionized water were used as the raw materials which were purchased from Sigma Aldrich Company, India. 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 dihydrogen phosphate crystal have been recorded at room temperature. The spectra were interpreted in terms of these wavenumber assignments. The optical band gap was determined from the UV-Visible spectroscopy analysis. Also, the morphology and antimicrobial activity studies were performed on the title crystal. Conclusion: The title crystal has monoclinic crystal system with the space group P21/n. The average crystalline size is found to be as 54 nm. Further, the presence of functional groups and elements were verified using FTIR and FT-Raman spectroscopy and energy dispersive X-ray studies. The SEM analysis shows that the complex crystal has smooth surface and flower like morphology. The optical band gap is determined as 3.8 eV. The antimicrobial activity study shows that the complex crystal screened the bacteria than that of the parent crystal. This modified chemical structure may improve the solubility and reduce the toxicity of drug compound.
  Chandran Muthuselvi , Sankara Sabapathy Pandiarajan , Bhagatsingh Ravikumar , Shunmuganarayanan Athimoolam , Navaneethakrishnan Srinivasan and Rajaputi Venkatraman Krishnakumar
  Background and Objective: The indeno quinoxaline pyrrolothiazole derivative crystal of ethyl 6'-cyano-7'-(p-tolyl)-1',5a,6’,7',7a',9a-hexa hydro-3'H-spiro [indeno [1,2-b]quinoxaline-11,5'-pyrrolo[1,2-c] thiazole]-6'-carboxylate (ECPTHSIPTC) was crystallized from slow evaporation method at room temperature. The grown crystal was characterized by the FT-IR, FT-Raman and UV-Visible spectroscopy techniques. The complete vibrational spectra of various functional groups wavenumber assignment for title crystal were interpreted in the present work. Materials and Methods: Ethyl cyano acetate, thioproline, benzaldehyde, indeno quinoxaline, ethyl acetate and chloroform were the raw materials used to synthesis the title compound. The synthesized compound was recrystallized from chloroform solution by the slow evaporation method. Results: FT-IR and FT-Raman spectrometers were used to record the vibrational spectra of title crystal at room temperature in the wavenumber range 4000- 400 cm1. The optical property was performed by double beam spectrophotometer in the wavelength range 200−1100 nm. Conclusion: The both spectroscopy studies confirmed the various functional groups present in the title compound. The UV-Visible spectroscopy study showed that the grown crystal has high transparency in the entire visible region and the optical band gap was found as 3.25 eV. The ECPTHSIPTC crystal was taking into account to study and investigated in this present work due to the wide-ranging applications in biological and pharmaceutical fields.
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