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CuS and CdS nanochains having average particle size 15.4 nm and 16.7 nm have been synthesized by reaction of Na2[M(HL)2(H2O)2] complexes; M = Cu, Cd; NaH2L = Eriochrome Black T with in situ formed H2S in aqueous solution phase. Na2[M(HL)2(H2O)2] complexes, prepared by reacting M(II) ions with NaH2L, were treated by H2S, formed by heating alkaline solution of thiourea at 80°C. The formed suspension was ultracentrifuged, washed with alcohol, air dried and analyzed for TEM. A mechanism for formation of CuS and CdS nanochains has also been proposed here.
The authors are thankful to DRDE Gwalior for TEM analyses. The authors are also thankful to Prof. K. K. Narang, Department of Applied Chemistry, Institute of Technology, Banaras Hindu University, Varanasi, for useful discussion and suggestion.