Understanding the near-infrared fluorescence and field-induced single-molecule-magnetic properties of dinuclear and one-dimensional-chain ytterbium complexes based on 2-hydroxy-3-methoxybenzoic acid

作者：Chen, Wen-Bin; Zhong, Li; Zhong, Yun-Jing; Zhang, Yi-Quan^*; Gao, Song; Dong, Wen^*

来源：Inorganic Chemistry Frontiers, 2020, 7(17): 3136-3145.

DOI：10.1039/d0qi00628a

• DY-III
• LUMINESCENT YTTERBIUM
• LANTHANIDE COMPLEXES
• ENERGY BARRIER
• ION-MAGNET
• BEHAVIOR
• ANISOTROPY
• RELAXATION
• BLOCKING
• SMM

The electronic [Xe]4f(13)configurations of Yb(iii) ions generate a variety of electronic energy levels, resulting in the fantastic optical and magnetic multifunctional properties of Yb(iii) complexes. Here, 2-hydroxy-3-methoxy benzoic acid (H(2)MBA) was used to construct two dinuclear and one-dimensional Yb(iii) complexes namely [Yb-2(HMBA)(2)(MBA)(2)(DMF)(2)(H2O)(2)]center dot 6H(2)O (1, DMF =N,N-dimethylformamide) and [NH4][Yb(HMBA)(4)] (2). Fluorescence measurements reveal that H(2)MBA can sensitize the characteristic near-infrared luminescence of Yb(iii). Magnetic susceptibility measurements show that the two Yb(iii) complexes are field-induced single-molecule magnets (SMMs) with anisotropy barriers of 18(1) cm(-1)and 20(1) cm(-1)for1and2, respectively. The magnetism-luminescence-structure correlations as well as relaxation pathways are investigated byab initiocalculations and fluorescence spectrometry.

• 单位
  广州大学