Abstract
A series of lanthanide selenidogermanates (H3O)[Tm(teta)2][Ge2Se6] (1, teta = triethylenetetramine) and [Ln(teta)(tren)Cl]2[Ge2Se6](en) {en = ethylenediamine, tren = N,N,N- tris(2-aminoethyl)amine, Ln = Pr (2a), Nd (2b), Sm (2c), Eu (2d), Gd (2e), Tb (2f)}were prepared under mild solvothermal conditions and structurally characterized. 1 contains isolated [Tm(teta)2]3+ ions, protonated H3O+ ions and dimeric [Ge2Se6]4− anions, while 2a–f are composed of [Ln(teta)(tren)Cl]3+ ions, dimeric [Ge2Se6]4− anions and free en molecules. The lighter lanthanide ions (Pr–Tb) adopt a distorted tricapped trigonal prism with the nine-coordinated number, and the heavier Tm3+ ion adopts a distorted bicapped trigonal prism with the eight-coordinated number. Their band gaps in the range of 1.52–1.86 eV are derived from optical absorption spectra.
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Acknowledgements
This work was supported by the NNSF of china (No. 21671029), the NSF of Chongqing municipality (Nos. cstc2014jcyjA50002, cstc2015jcyjBX0117), and Program for Excellent Talents in Chongqing Higher Education Institutions. The authors are also grateful to Chongqing Normal University for financial support (No. 14CSLJ02) and the Innovative Training Program of University Student (No. 201510637018).
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Tang, S., Liu, X. & Zhou, J. A Series of Dimeric Selenidogermanates with Lanthanide Complexes of Multidentate Chelating Amines. J Clust Sci 28, 2589–2600 (2017). https://doi.org/10.1007/s10876-017-1223-z
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DOI: https://doi.org/10.1007/s10876-017-1223-z