Ba3TM2Se9 (TM = Nb, Ta): Synthesis and characterization of new polyselenides

Ming Yan Chung, Chi-Shen Lee*

*Corresponding author for this work

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)

摘要

New ternary polyselenides Ba3TM2Se9 (TM = Nb, Ta) were synthesized through a solid-state reaction, and their structures were characterized using single-crystal X-ray diffraction. These compounds crystallized into a new structural type with a monoclinic space group P2 1/c. The structures were constructed from distorted, close-packed layers of ∞3[BaSe3]3.33- that incorporated TM atoms at octahedral sites and contained [(TM5+) 2(Se2-)7(Se2 2-)] units. Diffuse reflectance spectra and electronic resistivity measurements indicated semiconducting properties and optical band gaps of 1.3 eV for Ba 3Nb2Se9 and 1.6 eV for Ba3Ta 2Se9. Raman spectra were used to investigate the interatomic interactions. Calculations of the electronic structure verified the semiconducting behavior and bonding interaction of short Se-Se contacts.

原文English
頁(從 - 到)80-84
頁數5
期刊Inorganic Chemistry
53
發行號1
DOIs
出版狀態Published - 6 一月 2014

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