摘要
采用蒎烯吡啶基吡嗪手性配体(PY)与Dy(TTA)_3反应制备了一个新的双核Dy(Ⅲ)配合物[Dy_2(PY)(TTA)_3](1)。通过X射线单晶衍射确定了配合物的单晶结构,结果表明在晶体生长过程中一个蒎烯基团发生了手性翻转,导致双核镝配合物呈中心对称构型。对配合物进行变温磁化率测试表明,双核镝配合物在无外加直流磁场下即表现出明显的慢磁弛豫性质。
Single ion magnets based on Dy(Ⅲ) complexes are of particular interest due to their doubly degenerate high spin ground state and strong axial single-ion anisotropy. Herein, a new dinuclear dysprosium(Dy) complex[Dy2(PY)(TTA)6](1) was prepared by the reaction between a chiral pinene pyridyl pyrazine ligand(PY) and β-diketone Dy compound(Dy(TTA)3). X-ray single crystal diffraction characterization of the obtained complex indicated that the configuration inversion of chiral pinene group occurred during the crystal growth, which results in a central symmetry configuration. The temperature-dependent susceptibility test revealed that the prepared Dy complex exhibits slow magnetic relaxation in the absence of external dc magnetic field.
引文
[1]YOU Xiao-Zeng(游效曾).Molecular-Based Materials:Optoelectronic Functional Compounds(分子材料光电功能化合物).Shanghai:Shanghai Science and Technology Press,2001.
[2]Yamanouchi M,Chiba D,Matsukura F,et al.Nature,2004428(6982):539-542
[3]Saitoh E,Miyajima H,Yamaoka T,et al.Nature,2004,432(7034):203-206
[4]Yang L,Li J,Pu T C,et al.Dalton Trans.,2017,46(20):6670-6676
[5]Wu D Q,Shao D,Wei X Q,et al.J.Am.Chem.Soc.,2017139(34):11714-11717
[6]Bogani L,Wernsdorfer W.Nat.Mater.,2008,7(3):179-186
[7]Leuenberger M N,Loss D.Nature,2001,410(6830):789-793
[8]Hussain B,Savard D,Burchell T J,et al.Chem.Commun.2009(9):1100-1102
[9]Liu X Q,Zhang Y,Shi W,et al.Inorg.Chem.,2018,57(21)13409-13414
[10]WANG Ting-Wei(王庭玮),CHEN Hong-Jin(陈洪进)ZHANG Rui(张蕤),et al.Chinese J.Inorg.Chem.(无机化学学报),2018,34(6):1007-1017
[11]Ishikawa N,Sugita M,Ishikawa T,et al.J.Am.Chem.Soc.2003,125(29):8694-8695
[12]Ge J Y,Wang H Y,Li J,et al.Dalton Trans.,2017,46(10)3353-3362
[13]Jiang S D,Wang B W,Su G,et al.Angew.Chem.Int.,Ed.2010,49(41):7448-7451
[14]Tang J,Hewitt I,Madhu N T,et al.Angew.Chem.Int.Ed.2006,45(11):1729-1733
[15]Takamatsu S,Ishikawa T,Koshihara S Y,et al.Inorg.Chem.2007,46(18):7250-7252
[16]Li D P,Wang T W,Li C H,et al.Chem.Commun.,2010,46(17):2929-2931
[17]Li X L,Gao Y L,Feng X L,et al.Dalton Trans.,2012,41(38):11829-11835
[18]Li X L,Chen C L,GaoY L.Chem.Eur.J.,2012,18:14632-14637
[19]SAINT-Plus,Vers.6.02,Bruker Analytical X-ray System,Madison,WI,1999.
[20]Sheldrick G M.SADABS,an Empirical Absorption Correction Program,Bruker Analytical X-ray Systems,Madison,WI,1996.
[21]Sheldrick G M.SHELXL-97,Program for Crystal Structure Refinement,University of G觟ttingen,Germany,1997.
[22]Li D P,Zhang X P,Wang T W,et al.Chem.Commun.2011,47(24):6867-6869