蒎烯吡啶基吡嗪双核镝(Ⅲ)配合物的合成、晶体结构及磁性
|
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.
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
[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