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South African Journal of Chemistry

On-line version ISSN 1996-840X
Print version ISSN 0379-4350

S.Afr.j.chem. (Online) vol.61  Durban  2008




Preparation, structure characterization and thermal decomposition process of the dysprosium(III) m-methylbenzoate 1,10-phenanthroline complex



Su-Ling XuI,II; Jian-Jun ZhangI, *; Ning RenIII; Hai-Yan ZhangI,IV; Rui-Fen WangIV; Shu-Ping WangIV

IExperimental Center, Hebei Normal University, Shijiazhuang, 050016, People's Republic of China.
IIDepartment of Engineering, Shijiazhuang Foreign Economy and Trade Vocational College, Shijiazhuang, 050061, People's Republic of China
IIIDepartment of Chemistry, Handan College, Handan, 056005, People's Republic of China
IVCollege of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, 050016, People's Republic of China




A dinuclear complex [Dy(m-MBA)3phen]2-H2O was prepared by the reaction of DyCl3-6H2O, m-methylbenzoic acid and 1,10-phenanthroline in a 1:3:1 molar ratio, where m-MBA = m-methylbenzoate and phen = 1,10-phenanthroline. The complex was structurally characterized by single crystal X-ray diffraction, elemental analysis, UV and IR spectroscopy, molar conductance and TG-DTG techniques. It crystallizes in the monoclinic space group Cc with a =15.962(16), b = 18.505(18), c = 22.547(2) Ǻ; a = 90 °, β = 97.9820(10) °, y = 90°; z = 4. The unit cell contains a dinuclear molecule of the title compound. Each Dy(III) ion is eight-coordinated to one 1,10-phenanthroline molecule, one bidentate carboxylate group and four bridging carboxylate groups. The carboxylate groups are bonded to the dysprosium ions in two modes: chelating bidentate and bridging bidentate. The thermal decomposition process of [Dy(m-MBA)3phen]2-H2O has been followed by thermal analysis.

Keywords: m-Methylbenzoic acid, 1,10-phenanthroline, dysprosium complex, crystal structure, thermal analysis



Full text available only in pdf format.



This project was supported by the National Natural Science Foundation of China (No. 20773034), the Natural Science Foundation of Hebei Province (No. B2007000237), Hebei Science and Technology Department (No. 07215120), Hebei Normal University (No. L2006Z06, No. L2005Y12) and Handan College (No. 2006004).



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Received 29 September 2006
Revised 11 November 2007
Accepted 14 November 2007



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