A Mixed Porphyrin-Schiff Base Dysprosium(III) Single-Molecule Magnet

作者：Ma, Qi; Zeng, Suyuan; Feng, Xuenan; Cao, Wei; Wang, Hailong; Dou, Jianmin; Jiang, Jianzhuang^*

来源：European Journal of Inorganic Chemistry, 2016, 2016(26): 4194-4198.

DOI：10.1002/ejic.201600527

• SANDWICH-TYPE (NA)PHTHALOCYANINATO
• SELF-ASSEMBLED NANOSTRUCTURES
• CONTINUOUS SYMMETRY MEASURES
• INTERMOLECULAR INTERACTION
• VIBRATIONAL SPECTROSCOPY
• TETRAPYRROLE LIGANDS
• METAL-COMPLEXES
• DOUBLE-DECKERS
• SMM BEHAVIOR
• ION MAGNETS

The mixed porphyrin-Schiff base potassium dysprosium(III) complex [K(TBPP)Dy(L)(CH3CN)(2)] [H2TBPP = 5,10,15,20tetrakis(4-tert-butylphenyl)porphyrin; H2L = N,N'-bis(3-methoxysalicylidene) benzene-1,2-diamine; 1] was isolated from the reaction between the metal-free Schiff base ligand H2L and the half-sandwich porphyrinato dysprosium compound [Dy(TBPP)(acac)] (Hacac = acetylacetone) in the presence of KOH. A sandwich-type double-decker structure has been unambiguously revealed by single-crystal X-ray diffraction analysis. Static and dynamic magnetic measurements disclosed the slow relaxation behavior of this new double-decker compound and indicated its single-molecule magnet (SMM) nature. Comparative studies on the magnetic properties of 1, the homoleptic bis[5,10,15,20-tetrakis(4-tert-butylphenyl) porphyrinato]dysprosium double-decker [DyH(TBPP)(2)] (2), and the bis(Schiff base) dysprosium double-decker {[Dy[Zn(L)Cl](2)(DMF)(2)]center dot Cl} (3, DMF = N,N-dimethylformamide) indicate the effect of the ligand field (LF), through the deviation of the dysprosium coordination geometry from the ideal D-4d form, on the SMM properties of 1-3 in addition to the effect of the charge distribution over the Dy-III ion.

• 出版日期2016-9
• 单位聊城大学; 北京科技大学