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Abstract
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Recently, π-conjugated organic compounds and their coordinated metal complexes have been exposed for extensive investigations as regards their potential applications in nonlinear optical area[1]. Coordination metal based compounds in compartion with organic molecules were attracted significant interest, these inorganic compounds offer a large variety of molecular structures, the possibility of high environmental stability and diversity of electronic properties by the coordinated to metal center[2, 3]. Pyrazolylborate ligands as the π-conjugated system have been suggested to enhance the NLO response[4]. In this research, a type of bis(pyrazolyl)borate derivative and its nickel (II) complex were synthesized and characterized by physico-chemical and spectroscopic methods and nonlinear optical properties of them were investigated by z-scan method. Our findings indicated the synthesized nickel (II) complex have the highest value of the nonlinear absorption and nonlinear refraction parameters in comparison with the free ligand and other similar compounds.
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