Hydrothermal synthesis, crystal structures, and X-ray photoelectron spectroscopy of lead tellurium(iv) and tellurium(vi) oxycompounds: Ba3PbTe6O16and Na2Pb96-O)2(Te2O10)2

Han Ying Li, Kwang Hwa Lii

研究成果: 雜誌貢獻期刊論文同行評審

3 引文 斯高帕斯(Scopus)

摘要

An exploratory study of the lead-tellurium-oxygen phase space led to two new compounds, Ba3PbTe6O16(BPTO) and Na2Pb96-O)2(Te2O10)2(NPTO), which were synthesized under hydrothermal conditions at 550 °C and 210 °C, respectively, and characterized by single-crystal X-ray diffraction, infrared and X-ray photoelectron spectroscopy. BPTO adopts a layer structure. The Te4+cation in BPTO is bonded to four oxygen atoms at about 2.0 Å with two more oxygens at about 3.0 Å. The seesaw-shaped TeO4units share corners to form 2D layers containing six-membered rings and the Ba2+and Pb2+cations are situated in the interlayer region. The structure of NPTO contains dimers of edge-sharing Te6+O6octahedra, which are connected through five-coordinate Pb2+cations. A unique six-coordinate O atom is at the center of the octahedron formed by five Pb2+and one Na+cations. BPTO is one of the few metal tellurites which were synthesized under supercritical hydrothermal reaction conditions. The Pb2+cation in NPTO shows pronounced stereochemical effects of the lone electron pair. In contrast, BPTO shows no stereochemical evidence of the inert pair.

原文???core.languages.en_GB???
頁(從 - 到)8189-8195
頁數7
期刊Dalton Transactions
50
發行號23
DOIs
出版狀態已出版 - 21 6月 2021

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