Four mononuclear dysprosium complexes with neutral Schiff-base ligands: syntheses, crystal structures and slow magnetic relaxation behavior
作者:Hui Yang、Shan-Shan Liu、Yin-Shan Meng、Yi-Quan Zhang、Lin Pu、Xincheng Wang、Shijing Lin
DOI:10.1039/d1dt03701c
日期:——
Four mononuclear 9-coordinate Dy-based complexes, [Dy(HL1)2(NO3)3(CH3OH)] (1Dy), [Dy(HL2)2(NO3)3(H2O)] (2Dy), [Dy(HL3)3(NO3)3]·CH3CN (3Dy), and [Dy(HL4)3(NO3)3] (4Dy), have been constructed by neutral Schiff-base ligands (1-[N-(4-R)aminomethylidene-2(1H)-naphthalenone, R = –Cl (HL1), –NO2 (HL2), –OCH3 (HL3), –I (HL4)). By tuning the terminal substituent group of HL ligands, the number of HL ligands
四个单核 9 坐标 Dy 基配合物,[Dy(HL 1 ) 2 (NO 3 ) 3 (CH 3 OH)] ( 1Dy ),[Dy(HL 2 ) 2 (NO 3 ) 3 (H 2 O)] ( 2Dy )、[Dy(HL 3 ) 3 (NO 3 ) 3 ]·CH 3 CN ( 3Dy ) 和 [Dy(HL 4 ) 3 (NO 3 ) 3 ] ( 4Dy ),由中性 Schiff-碱基配体(1-[ N-(4-R)氨基亚甲基-2( 1H )-萘酮,R = -Cl (HL 1 ),-NO 2 (HL 2 ),-OCH 3 (HL 3 ),-I (HL 4 ))。通过调整 HL 配体的末端取代基,与中心 Dy 3+离子配位的 HL 配体数量意外地从 2 变为 3,并且 Dy 3+离子周围的局部对称性从D 3h减少到C s。磁测量表明2Dy可以在零直流场中显示单离子磁体 (SIM) 行为,而1Dy、3Dy和