Two systems, Ln/Sn/Se/en and Ln/Sn/Se/dien, were investigated under solvothermal conditions, and novel lanthanide selenidostannates [{Ce(en)4}2(μ-Se2)]Sn2Se6 (1a), [{Ln(en)3}2(μ-OH)2]Sn2Se6 (Ln = Pr(1b), Nd(1c), Gd(1d); en = ethylenediamine), [{Ln(dien)2}4(μ4-Sn2Se9)(μ-Sn2Se6)]∞ (Ln = Ce(2a), Nd(2b)), and [Hdien][Gd(dien)2(μ-SnSe4)] (2c) (dien = diethylenetriamine) were prepared and characterized. Two structural types of lanthanide selenidostannates were obtained across the lanthanide series in both systems. In the Ln/Sn/Se/en system, two types of binuclear lanthanide complex cations [Ce2(en)8(μ-Se2)]4+ and [{Ln(en)3}2(μ-OH)2]4+ (Ln = Pr, Nd, Gd) were formed depending on the Ln3+ ions. The complex cations are compensated by the [Sn2Se6]4− anions. In the Ln/Sn/Se/dien system, coordination polymer [{Ln(dien)2}4(μ4-Sn2Se9)(μ-Sn2Se6)]∞ and ionic complex [Hdien][Gd(dien)2(μ-SnSe4)] are obtained along the lanthanide series, among which the μ4-Sn2Se9, μ-Sn2Se6 and μ-SnSe4 ligands to the Ln3+ ions were observed. The formation of title complexes shows the effects of lanthanide metal size and amino ligand denticity on the lanthanide selenidostannates. Complexes 1a-2c exhibit semiconducting properties with band gaps between 2.08 and 2.48 eV.
You have access to this article
Please wait while we load your content...
Something went wrong. Try again?