Original Articles
C. Muthuselvi, M. Dhavachitra
Abstract
Medicinally important drug of aspirin was grown by vapor diffusion method in the phosphoric acid medium. Various studies were carried out on the harvested crystals from this method to confirm the aspirin crystal. The study of metal complex of the aspirin crystal has already been published by many authors. In the similar manner, the aspirin crystal was grown by our group to analyze the drug compound grown in the presence of phosphoric acid medium. The powder XRD analysis shows the sharp intense peaks of the crystalline compound of aspirin along with phosphoric acid. The FT−IR and FT−Raman spectroscopy studies confirm the various functional groups of aspirin. Also the vibration bands corresponding to the phosphoric acid were identified in the IR and Raman spectra. These bands are due to the presence of phosphoric acid molecules attached on the surface of the aspirin crystal during crystal growth. It is one more conformational study of aspirin crystal in the medium of the phosphoric acid. The band gap value of crystal was found to be at 4.3 eV in the UV−Visible spectroscopy study. Also, the morphology of the grown crystal is identified from the SEM microphotograph. The elemental analysis has been carried out for the title crystal by EDAX. The melting point study of the grown crystal by capillary tube method matches with the melting point of the aspirin.