Mineralizer effect on the synthesis of two types of one-dimensional chains silver-selenogermanate and selenostannate

摘要

Two type of one-dimensional compounds, K2Ag2GeSe4(2) and K3AgSn3Se8(4), were synthesized with thiophenol as a mineralizer, whilst two oligomers, Cs4Ge2Se6 (1) and K4Sn3Se8(3), were obtained in absence of thiophenol. Compounds 1 and 3 contain dimeric [Ge2Se6]~(4-) and trimeric [Sn3Se8]~(4-) anions, respectively. Compound 2 contains isolated GeSe4 tetrahedra connected by linear-coordinated Ag+ ions to form an infinite anionic chains [Ag2GeSe4]~(2-). The building blocks [Sn3Se8]~(4-) are linked by tetrahedral coordinated Ag~+ ions to generate infinite chain [AgSn3Se8]~(3-) of 4.