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Z. Naturforsch. 2013,
68b, 1015 – 1020
doi:10.5560/ZNB.2013-3126
Synthesis, Crystal Structure and Magnetic Properties of a Mn(II) Fluorenedicarboxylate Complex
1 Faculty of Science, Ningbo University, Ningbo, Zhejiang 315211, P. R. China
2 Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang 315211, P. R. China
Reprint requests to Prof. Dr. Xing Li. Fax: Int. +574/87600869. E-mail:
lix905@126.com or
lixing@nbu.edu.cn
Received May 12, 2013 / published online September 4, 2013
A new Mn(II) metal-organic framework, [Mn(DFDC)(phen)]n (1) (where H2DFDC = 9,9-diethylfluorene-2,7-dicarboxylic acid, phen = 1,10-phenanthroline), was solvothermally synthesized and characterized by single-crystal and powder X-ray diffraction (PXRD), elemental and thermal analysis, IR, UV/Vis spectroscopy, fluorescence and magnetic measurements. Single-crystal X-ray analysis reveals that 1 exhibits a three-dimensional coordination polymer structure. The compound crystallizes in the orthorhombic space group Pnna with a = 9.1215(9), b = 26.436(3), c = 10.2428(10) Å, V = 2469.9(4) Å3, Z = 4,
final wR2 = 0.1323 for 2825 reflections. The Mn(II) ion is coordinated by four oxygen atoms from four different H2DFDC ligands and two nitrogen atoms from one phen ligand in an octahedral coordination geometry. The compound shows ferromagnetic coupling behavior and has high thermal stability up to 420 °C.
Key words: Solvothermal Synthesis, Crystal Structure, Fluorenedicarboxylate, Mn(II) Complex