Hemiporphyrazine-Involved Sandwich Dysprosium Double-Decker Single-Ion Magnets

作者：Liu, Wenbo; Zeng, Suyuan; Chen, Xin; Pan, Houhe; Qi, Dongdong; Wang, Kang^*; Dou, Jianmin^*; Jiang, Jianzhuang^*

来源：Inorganic Chemistry, 2018, 57(19): 12347-12353.

DOI：10.1021/acs.inorgchem.8b02068

• FIELD-EFFECT TRANSISTORS
• MOLECULE-MAGNET
• TRIPLE-DECKER
• SCHIFF-BASE
• LANTHANIDE COMPLEXES
• LIGAND-FIELD
• PHTHALOCYANINE
• PERFORMANCE
• COORDINATION
• BEHAVIOR

Both heteroleptic (phthalocyaninato)-(hemiporphyrazinato) and homoleptic bis(hemiporphyrazinato) dysprosium double-decker complexes, Dy[H(Hp)(2)] (1) and Dy[H(Pc)(Hp)] (2) (H2Pc = metal-free phthalocyanine; H(2)Hp = metal-free hemiporphyrazine), were designed, synthesized, and structurally characterized. The dysprosium center in both double-deckers are octa-coordinated with a nearly ideal square-antiprismatic coordination geometry, which provides an increased molecular anisotropy for the dysprosium ion and ensures the strengthened magnetic properties of both single-ion magnets (SIMs) in terms of coordination geometry. Magnetic studies reveal that both double-deckers exhibit typical SIM behavior with a spin reversal energy barrier of 80.1 +/- 6.3 K for 1 and 57.3 +/- 3.8 K for 2 as well as the hysteresis loops emerging at 3 K. In particular, introduction of two Hp ligands with four pyridine nitrogen atoms coordinated with the dysprosium spin center endows Dy[H(Hp)(2)] (1) with the thus far highest energy barrier among the sandwich-type dysprosium SIMs with N-4-macrocyclic ligands, revealing the potential applications of sandwich-type lanthanide complexes with Hp ligands in molecular-based information storage.

• 出版日期2018-10-1
• 单位聊城大学; 北京科技大学