Journal
INORGANIC CHEMISTRY
Volume 52, Issue 19, Pages 11377-11384Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ic401655h
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Funding
- 973 Program of China [2012CB626803]
- National Natural Science Foundation of China [U1129301, 51172277, 21101168, 11104344]
- Main Direction Program of Knowledge Innovation of CAS [KJCX2-EW-H03-03]
- Funds for Creative Cross & Cooperation Teams of CAS
- Major Program of Xinjiang Uygur Autonomous Region of China [201130111]
- High Technology Research & Development Program of Xinjiang Uygur Autonomous Region of China [201116143]
- Science and Technology Project of Urumqi [G121130002]
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The structures of two new lead-containing oxyborate bromines, Pb-2(O4Pb8)(BO3)(3)Br-3 and Pb-2(O8Pb12)(BO3)(2)Br-6 (2), are determined by single-crystal X-ray diffraction for the first time. Both of them crystallize in the space group C2/c of the monoclinic crystal system. Although the two compounds have the same type of fundmental building units (FBUs), the OPb4, anion-centered tetrahedra and BO3 triangles, they exhibit different connection modes. Compound 1 consists of single (1)(infinity)[OPb2] chains, while compound 2 possesses (1)(infinity)[O2Pb3] ribbons. Interestingly, large Br atoms profoundly influence the conformation of polyions based on the OPb4 anion-centered tetrahedra, resulting in single (1)(infinity)[OPb2] chains linked up by finite zweier chains with four OPb4 tetrahedra via the opposite edges in compound 1 and (1)(infinity)[O2Pb3] ribbons with sequential condensation of OPb2 chains in compound 2. A detailed description of the effect of large Br atoms on the conformation of polyions is discussed. IR spectroscopy, UV-vis-NIR diffuse reflectance spectroscopy, and thermal analysis are also performed on the reported materials.
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