Preparation,characterization and electrical conductivity of new heterobimetallic chalcogenates and their 1,10-phenanthroline adducts |
| |
| Authors: | Singh Nanhai Singh Vinay Kumar |
| |
| Institution: | (1) Department of Chemistry, Banaras Hindu University, Varanasi, 221 005, India |
| |
| Abstract: | New mixed metal chalcogenate coordination polymers, MPb(SCN)2(SeCN)2 M = CoII, NiII or HgII], Ag2-Pb(SCN)2(SeCN)2, and the complex heterobimetallic salts, M(phen)3]Pb(SCN)2(SeCN)2]M = CoII or NiII; phen = 1,10-phenanthroline] that have been prepared and characterized by elemental analyses, i.r. and u.v.–vis. spectra, and by powder XRD patterns. Their solid state electrical conductivities have been investigated, show 
rt in the 10–10–10–6 S cm–1 range, and semiconduct at 313–383 K with band gaps in the 0.28–0.91 eV range. Co(phen)3]Pb(SCN)2(SeCN)2], exhibits a remarkable increase, i.e. 104 order of magnitude, in conductivity at higher temperature, which reflects a disordered metallic system where charge carriers have difficulty in crossing the non-conducting barrier at low temperature. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
