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The effect of water molecule on the thermal stability of lanthanide compounds with 1,3-benzeneditetrazol-5-yl

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Abstract

Six lanthanide compounds [Ln(H2O)9](m-BDTH)3·9(H2O) where Ln = La (1), and [Ln(H2O)8](m-BDTH)3·9(H2O) (m-BDTH2 = 1,3-benzeneditetrazol-5-yl) where Ln = Lu (2), Yb (3), Er (4), Ho (5) and Y (6) were hydrothermally synthesized and characterized by elemental analyses, infrared spectra, powder X-ray diffraction (PXRD) and X-ray single crystal diffraction. PXRD indicates that 2–6 are isomorphous. Structural analyses reveal that 1 is coordinated by nine water molecules forming a capped-square antiprism, while 2–6 are coordinated by eight water molecules forming a simple square antiprismatic geometry. Effects of water molecules on thermal stability were also discussed by thermogravimetric (TG), DSC, and PXRD under different temperatures. TG analyses suggest that 1 loses lattice and coordinated water molecules with no diacritical boundary, and 6 removes lattice water molecules first and then coordinated water molecules. DSC and PXRD further confirm the consequence.

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Acknowledgements

We gratefully acknowledge the financial support from the National Natural Science Foundation of China (grant no. 20873100), and the Nature Science Foundation of Shaanxi Province (grant nos. FF10091 and SJ08B09).

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Authors and Affiliations

  1. Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an, 710069, China

    Cheng-Fang Qiao, Qing Wei, Zheng-Qiang Xia & San-Ping Chen

  2. Department of Chemistry, Shangluo University, Shangluo, 726000, China

    Cheng-Fang Qiao & Chun-Sheng Zhou

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  1. Cheng-Fang Qiao
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  2. Qing Wei
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  3. Zheng-Qiang Xia
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Correspondence to San-Ping Chen.

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Qiao, CF., Wei, Q., Xia, ZQ. et al. The effect of water molecule on the thermal stability of lanthanide compounds with 1,3-benzeneditetrazol-5-yl. J Therm Anal Calorim 107, 527–533 (2012). https://doi.org/10.1007/s10973-011-1607-5

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  • DOI: https://doi.org/10.1007/s10973-011-1607-5

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