title: Photophysical studies of oxicam group of NSAIDs: piroxicam, meloxicam and tenoxicam.
abstract: Oxicam group of non steroidal anti-inflammatory drugs has been chosen as a prototype molecular group that shows diverse biological functions and dynamic structural features. Photophysical studies of three drugs from this group viz., piroxicam, meloxicam and tenoxicam have been carried out in different solvents with varying polarity, H-bond character and viscosity. The spectral responses of different prototropic forms of these drugs towards varying solvent parameters have been studied, with the aim to characterize their interaction in biomimetic environment non-invasively. The nature of the lowest transition has been identified. The extinction coefficient, quantum yield and viscosity dependence on the nature of the solvents, all indicate the extreme sensitivity of these drugs to their microenvironment.
authors.affiliation: Chemical Sciences Division, Saha Institute of Nuclear Physics, 1/AF, Bidhannagar, 700 064, Calcutta, India.
authors.forename: Rona
authors.initials: R
authors.lastname: Banerjee
authors.forename: Hirak
authors.initials: H
authors.lastname: Chakraborty
authors.forename: Munna
authors.initials: M
authors.lastname: Sarkar
mesh_terms: D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000032:analysis / Q000737:chemistry*; D055592:Biophysical Phenomena; D001703:Biophysics; D006860:Hydrogen Bonding; D007477:Ions; D000077239:Meloxicam; D008956:Models, Chemical; D010894:Piroxicam / Q000031:analogs & derivatives* / Q000032:analysis / Q000737:chemistry*; D012997:Solvents / Q000494:pharmacology; D013843:Thiazines / Q000032:analysis / Q000737:chemistry*; D013844:Thiazoles / Q000032:analysis / Q000737:chemistry*; D014783:Viscosity
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D007477:Ions; D012997:Solvents; D013843:Thiazines; D013844:Thiazoles; D010894:Piroxicam; D000077239:Meloxicam; C032801:tenoxicam