Chandrakantha , B and Isloor, Arun M and Sridharan , Kishore and Philip, Reji and Shetty, Prakash and Padaki, Mahesh (2013) Novel N-substituted-5-phenyl-1H-pyrazole-4-ethyl Carboxylates as potential NLO materials. Arabian Journal of Chemistry, 6. pp. 97-102. ISSN 1878-5352

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Abstract

In the present investigation we have synthesized a novel series of N-substituted-5-phenyl- 1H-pyrazole-4-ethyl carboxylates, which are characterized by 1H NMR, UV–Vis and FT-IR spectroscopy methods. The optical nonlinearity of the compounds in chloroform solution has been studied at 532 nm using 5 ns laser pulses, employing the open-aperture z-scan technique. It is found that compound 3c having carboxylic acid group and ester substituent has maximum nonlinearity. From measurements we conclude that compounds 3c (4-[4-(ethoxycarbonyl)-5-phenyl-1H-pyrazol- 1-yl]benzoic acid) and 3e (ethyl 1-(2-bromophenyl)-5-phenyl-1H-pyrazole-4-carboxylate) are potential candidates for optical limiting applications.

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