Magneto-structural correlation in lanthanide luminescent [2.2]paracyclophane-based single-molecule magnets
作者:Hadrien Flichot、Annika Sickinger、Jules Brom、Bertrand Lefeuvre、Vincent Dorcet、Thierry Guizouarn、Olivier Cador、Boris Le Guennic、Laurent Micouin、Olivier Maury、Erica Benedetti、Fabrice Pointillart
DOI:10.1039/d4dt00536h
日期:——
determination of the crystal field spitting of both the 2F7/2 ground state and 2F5/2 excited state for 2-Yb and 4-Yb. Moreover, 3-Dy and the two Yb(III) derivatives displayed field-induced single-molecule magnet (SMM) behaviour with slow magnetic relaxation occurring through the Raman process only for 2-Yb and 4-Yb, whereas a combination of Orbach and Raman processes was identified for 3-Dy.
文献中很少报道镧系离子和对环芳烷衍生物的缔合。本研究通过单晶X射线测定,详细阐述了涉及1,4(1,4)-二苯并环六烷-1 2 ,4 3 -二基双(二苯基氧化膦)配体( L )的五种配位稀土配合物。式 [Ln(hfac) 3 ( L )] (hfac- = 1,1,1,5,5,5-六氟乙酰丙酮) (Ln = Dy( III ) ( 1-Dy ) 和 Yb 的四种单核络合物的衍射结构( III ) ( 2-Yb )) 和 [Ln(tta) 3 ( L )] (tta − = 2-烯酰基三氟乙酰丙酮) (Ln = Dy( III ) ( 3-Dy ) 和 Yb( III ) ( 4- Yb )) 和一种双核配合物 [Na(Dy 2 (hfac) 6 ( L ) 2 )](BArF) (BArF − = 四[3,5-双(三氟甲基)苯基]硼酸盐) ( 5-Dy )。使用元素分析、红外光谱、直流和交流