Chandrakantha, B.Isloor, A.M.Philip, R.Mohesh, M.Shetty, P.Vijesh, A.M.2026-02-052011Bulletin of Materials Science, 2011, 34, 4, pp. 887-8912504707https://doi.org/10.1007/s12034-011-0210-5https://idr.nitk.ac.in/handle/123456789/27340A new series of 1,3,4-oxadiazole derivatives containing 2-fluoro-4-methoxy phenyl were synthesized by refluxing mixture of acid hydrazide 3 with different aromatic carboxylic acids (a-e) in phosphorous oxychloride. These newly synthesized compounds were characterized by NMR, mass spectral, and IR spectral studies, and also by C, H, N analyses. The open-aperture z-scan experiment was employed to measure the optical nonlinearity of the samples at 532 nm, using 5 ns laser pulses. The measurements indicate that compound 4a, which contains Bromine, behaves as an optical limiter at this wavelength, with potential applications in optoelectronics. © Indian Academy of Sciences.Bromine compoundsOptical propertiesSpectroscopic analysis1 , 3 , 4-oxadiazole1 ,3 ,4-oxadiazolesAromatic carboxylic acidsIR spectral studiesNonlinear propertiesOptical limitingOptical nonlinearityZ-scanNonlinear optics