(Boratabenzene)(cyclooctatetraenyl) lanthanide complexes: a new type of organometallic single-ion magnet. Issue 6 (21st March 2016)

• Record Type: Journal Article
• Authors: Meng, Yin-Shan; Wang, Chun-Hong; Zhang, Yi-Quan; Leng, Xue-Bing; Wang, Bing-Wu; Chen, Yao-Feng; Gao, Song
• Is Part Of: Inorganic chemistry frontiers. Volume 3:Issue 6(2016)
• Page Start: 828
• Page End: 835
• Publication Date: 2016-03-21
• Subjects: Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c6qi00028b
• Languages: English
• ISSNs: 2052-1553

Abstract

Abstract : (Boratabenzene)(cyclooctatetraenyl) lanthanide complexes were synthesized, and the erbium ones showed single-ion magnet behaviours. One complex exhibited hysteresis up to 8 K, and another one featured energy barrier of 300 cm −1 . Abstract : A series of new sandwich type lanthanide complexes containing both boratabenzene and cyclooctatetraenyl ligands, [(C5 H5 BR)Ln(COT)] (1Er : R = H, Ln = Er;2Er : R = Me, Ln = Er;3Er : R = NEt2, Ln = Er;4Dy : R = H, Ln = Dy;5Dy : R = Me, Ln = Dy;6Dy : R = NEt2, Ln = Dy;7Y : R = NEt2, Ln = Y), were synthesized. The structures of1Er–7Y were all characterized by single crystal X-ray diffraction. Dynamic susceptibility experiments showed that the erbium complexes1Er–3Er exhibited slow magnetic relaxation under zero dc field while the dysprosium complexes4Dy–6Dy did not. For the erbium complexes, the magnetic properties were influenced by the substituent on the boron atom.1Er exhibited hysteresis up to 8 K, and2Er featured the highest energy barrier (300 cm −1 ) among all the reported erbium single-ion magnets (SIMs). The influence of the boron substituent on the magnetic properties was highlighted by ab initio calculations.