Abstract
A series of 1-D lanthanide coordination polymers [Ln(μ3-OH)(pybz)(pa)] n (Ln = Er (1), Tb (2), Gd (3), Hpybz = 4-pyridin-4-yl-benzoic acid, Hpa = 2-picolinic acid) based on [Ln4(μ3-OH)4] cluster units have been hydrothermally synthesized and characterized by single crystal X-ray diffraction, IR, elemental analysis, and thermogravimetric analysis. X-ray crystal structure analyses reveal that 1–3 are isomorphous with tetragonal space group P \( \overline{4} \)21c and comprise tetranuclear Ln–O clusters, in which four Ln3+ centers are joined together by four μ3-bridging hydroxyl groups to form cubane-like [Ln4(μ3-OH)4]8+ cores that are further linked by four μ3-pa− ligands to produce 1-D chains along the c-axis.
Graphical Abstract
A series of 1-D lanthanide coordination polymers [Ln(μ3-OH)(pybz)(pa)] n (Ln = Er (1), Tb (2), Gd (3), Hpybz = 4-pyridin-4-yl-benzoic acid, Hpa = 2-picolinic acid) based on [Ln4(μ3-OH)4] cubanes have been hydrothermally synthesized. For this compound, tetranuclear cubane-like clusters [Ln4(μ3-OH)4]8+ composed of four Ln3+ centers as building blocks are further assembled into 1-D chains along the c-axis.
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Acknowledgments
The authors are thankful for the financial supports from the National Natural Science Fund for Distinguished Young Scholars of China (no. 20725101), the NNSF of China (no. 50872133), the 973 Program (no. 2006CB932904), the NSF of Fujian Province (nos. E0510030 and 2008F3120), and the Knowledge Innovation Program from CAS (no. KJCX2.YW.H01).
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Wang, ZL., Fang, WH. & Yang, GY. A Series of 1-D Lanthanide Coordination Polymers Based on [Ln4(μ3-OH)4] (Ln = Er, Tb, Gd) Cluster Units. J Clust Sci 20, 725–733 (2009). https://doi.org/10.1007/s10876-009-0276-z
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DOI: https://doi.org/10.1007/s10876-009-0276-z