“…The chemistry of transition metals Cu (Ag, Au) has been attracting considerable attention [1] because these compounds with interesting electronic, optical, structural and catalytic properties are of important biological and industrial significance in advanced materials, biological processes, and catalytic reactions [2,3]. Great interest in these compounds has recently been aroused by the search for better materials with thirdorder NLO properties because of their potential applications, not only in the protection of optical sensors and the human eye from high-intensity laser beams, but also in the development of optical signal detection techniques such as those utilized in optical computers and broad-band communication [4,5].…”