Synthesis, structure and magnetic property study on the mixed valence dodenuclear manganese clusters

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	Synthesis, structure and magnetic property study on the mixed valence dodenuclear manganese clusters
	An, Jin ; Chen, Zhida ; Bian, Jiang ; Gao, Song ; Wang, Shixi ; Xu, Guangxian ; Chen, Jiutong
刊名	北京大学学报自然科学版
	2000
英文摘要	In order to explore the influence of the ligands and solvents on the magnetic properties of Mn12 complexes, the syntheses and magnetochemical properties of [Mn12O12(3-Cl-C6H4CO2)16(H2O)3$ / (3-Cl-C$-6H4CO2H)]??3-Cl-C6H4CO2H 1, [Mn12O12(3-Br-C6H4CO2)13(CH3CO2 )3(H 2O)4] 2 have been studied. The crystal structure of the complex 1 has been characterized by X-ray diffraction method. The complex 1 crystallizes in the triclinic, space group of P1 over-bar . with a = 17.5779(3) angstroms, b = 18.2712(3) angstroms, c = 34.3616(5) angstroms, ?? = 103.515(1)??, ?? = 91.784(1)??, ?? = 116.25??, V = 9508.5(3) angstroms3, Z = 2, Dc = 1.294 mg??m-3, ?? = 1.085 mm-1, F(000) = 3 696, and S = 1.096. It is found that the complex 1 consists of a central cubane-like [Mn44+O4]8+ held within a nonplanar ring of eight Mn+3 ions and eight ??3-O2- ions. For both complexes 1 and 2 the ?? double prime m signals are observed in the region 2 to approximately 10 K, measured at three different frequencies, and exhibit two-frequency dependent of X double prime m AC peaks with a predominant peak in the 4 to approximately 10 K region. The magnetization hyteresis loops for the complexes 1 and 2 show the step-like character. These steps are attributable to the resonant magnetization tunneling. The affect of ligands and solvent on the magnetic properties of the title complexes are briefly discussed.; EI; 0; 4; 439-447; 36
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/407968]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	An, Jin,Chen, Zhida,Bian, Jiang,et al. Synthesis, structure and magnetic property study on the mixed valence dodenuclear manganese clusters[J]. 北京大学学报自然科学版,2000.
APA	An, Jin.,Chen, Zhida.,Bian, Jiang.,Gao, Song.,Wang, Shixi.,...&Chen, Jiutong.(2000).Synthesis, structure and magnetic property study on the mixed valence dodenuclear manganese clusters.北京大学学报自然科学版.
MLA	An, Jin,et al."Synthesis, structure and magnetic property study on the mixed valence dodenuclear manganese clusters".北京大学学报自然科学版 (2000).