Crystal Structures, Thermal Properties, and Biological Activities of a Series of Lanthanide Compounds with 2,4-Dichlorobenzoic Acid and 1,10-Phenanthroline

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• 作者：Jing-Yu Liu ; Ning Ren ; Jian-Jun Zhang ; Shu-Mei He ; Shu-Ping Wang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：May 8, 2013
• 年：2013
• 卷：52
• 期：18
• 页码：6156-6163
• 全文大小：470K
• 年卷期：v.52,no.18(May 8, 2013)
• ISSN：1520-5045

文摘

A new family of binuclear lanthanide compounds of general formula [Ln(2,4-DClBA)₃phen]₂ (Ln(III) = Nd (1), Sm (2), Dy (3), Yb (4); 2,4-DClBA = 2,4-dichlorobenzoate; phen = 1,10-phenanthroline) have been synthesized and characterized by elemental analysis, molar conductance, infrared spectroscopy, ultraviolet spectra, thermogravimetric analysis, and single-crystal X-ray diffraction. On the basis of X-ray crystallography, compounds 2鈥?b>4 belong to the triclinic crystal system, PI̅ space group. In compound 2, the Sm³⁺ ion adopted a distorted monocapped square-antiprism coordination geometry. Compounds 3 and 4 are isomorphous whose central ions (Dy³⁺ and Yb³⁺) formed a distorted square-antiprism geometry. The heat capacities of compounds 1鈥?b>4 are measured using DSC technology and fitted to a polynomial equation by the least-squares method. The smoothed molar heat capacities and thermodynamic function data of compounds 1鈥?b>4 relative to the reference temperature 298.15 K are then calculated. Meanwhile, these compounds exhibit in good antifungal activity against C. albicans, good antibacterial activity against S. aureus, and better antibacterial activity against E. coli. The fluorescence spectra of the samarium and dysprosium compounds behave as characteristic transitions of Sm(III) and Dy(III) ions.