Single-molecule magnet behavior in a mononuclear dysprosium(iii) complex with 1-methylimidazole. Issue 5 (12th January 2017)

• Record Type: Journal Article
• Authors: Yao, Binling; Gu, Bin; Su, Meihui; Li, Guoliang; Ma, Yue; Li, Licun; Wang, Qinglun; Cheng, Peng; Zhang, Xuan
• Is Part Of: RSC advances. Volume 7:Issue 5(2017)
• Page Start: 2766
• Page End: 2772
• Publication Date: 2017-01-12
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra25038f
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Using 1-methylimidazole ligand and Dy(hfac)3 ·2H2 O salt achieved a new single-molecule magnet of [Dy(hfac)3 ·(1-MeIm)2 ] with an energy barrier of 42.54 K. Abstract : Three novel mononuclear lanthanide complexes coordinated with 1-methylimidazole [Ln(hfac)3 ·(1-MeIm)2 ] (Ln = Dy(1 ), Tb(2 ) and Ho(3 ), hfac = hexafluoroacetylacetonate, 1-MeIm = 1-methylimidazole) have been designed and characterized by single-crystal X-ray diffraction, luminescence and magnetic measurements. Studies indicate that the metal ions of all three mononuclear complexes adopt a slightly distorted D 4d [LnO6 N2 ] coordination environment, which is formed by two terminal 1-methylimidazole ligands and three bischelating hfac − anions. Frequency dependent out-of-phase signals were observed for complex1 in dynamic magnetic susceptibility measurements, which indicates single-molecule magnetic behavior.