Electrical properties of the nanocomposite (copper, samarium)-containing complex compound

Abstract

A new semiconductor material tetrakis-µ3-(methoxo)(methanol)-pentakis (acetylacetonate)(tricopper(II), samarium(III)) (I) with composition [Cu3Sm(AA)5(OCH3)4CH3OH], where HAA = H3C–C(O)–CH2–C(O)–CH3 has been synthesized. By the data of elemental analysis and physicochemical research methods, it was established that the obtained complex compound (I) contained atoms of copper (II) and samarium (III) in ratio Cu:Sm = 3:1, and its composition corresponded to the gross formula Cu3SmО15C30Н51. Electrical conductivity of the obtained material in pressed form was measured. For the complex compound (I) such parameters were calculated: the number of valence electrons in one molecule – 272; mass of one molecule – 164.867∙10-20 kg; the total number of molecules in the cylindrical sample of a 0.131 g mass and a 18.24∙10-9 m3 volume – 7.946∙1013moleculas; the total number of valence electrons – 272. In the 303~413 K temperature range, the resistivity of the pressed sample decreases from 4∙1011 to 7∙104 Ohm∙cm, which confirms that the isolated compound is a semiconductor with a bandgap ΔE = 1.526 eV. Electrical conductivity properties of the complex compound as thermo- and magnetically sensitive element were studied, for this purpose a test sample of compressed material with 0.5×0.5×1.0 mm geometric dimensions was utilized.