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Synthesis, structures and magnetic properties in 3d-electron-rich isostructural complexes based on chains with sole syn-anti carboxylate bridges
Su, F; Lu, LP; Feng, SS; Zhu, ML; Gao, ZQ; Dong, YH; Gao ZQ(高增强); Dong YH(董宇辉)
2015
发表期刊DALTON TRANSACTIONS
卷号44期号:16页码:7213-7222
摘要To evaluate magnetic properties of isostructural compounds, a series of 3D carboxylate coordination polymers [M(H(2)bpta)](n), (H(4)bpta = 2,2',4,4'-biphenyltetracarboxylic acid, M = Fe(II) (1), Ni(II) (2), Cu(II) (3) and Zn(II) (a)), was synthesized in H2O-CH3CN or H2O solvents, respectively. Structurally, complexes 1-4 have isostructural features with (5,5)-connected 3D framework, wherein the M(II) centre takes an octahedral coordination environment consisting of six oxygen atoms from carboxylates of ligands. The M(II) sites are linked by syn-anti carboxylates to form chains with an M center dot center dot center dot M separation of 4.880(2) (M = Fe), 4.784(2) (M = Ni), 4.541(2) (M = Cu), and 4.607(2) angstrom (M = Zn), respectively. The shortest M center dot center dot center dot M distances between interchains locate 9.122(4), 9.077(3), 9.361(3), and 8.767(2) angstrom, respectively. Magnetically, the isostructural polymers show different magnetic behaviors due to different spins of central ions. Theoretical analysis indicates that couplings between magnetic ions obey uniform chain models. The magnetic susceptibility of 1 and 2 are perfectly fitted by the modified Fisher model to yield an effective intra-chain exchange coupling constant of -0.81(1) and 3.67(2) cm(-1), respectively. For 3, a Heisenberg ferromagnetic S = 1/2 chain included the intra-chain magnetic exchange interaction (J = 9.28(1) cm(-1), and zj' = -0.068(3) cm(-1)), weak ferromagnetic interactions in intra-chains, and weak antiferromagnetic interactions between interchains. The phenomena of 1-3 accord with the common view that the exchange interaction between two magnetic M(II) ions bridged by the syn-anti carboxylate bridge is dominantly weak ferro- or anti-ferromagnetic interactions. In addition, the M-O-C-O-M spin exchange interactions vertical bar J vertical bar of M-2(CO2)(2) (M = Mn(3d(5))(20), Fe(3d(6)), Co(3d(7))(20), Ni(3d(8)), Cu(3d(9)) decrease in strength with Cu-2(CO2)(2) > Ni-2(CO2)(2) > Co-2(CO2)(2) > Fe-2(CO2)(2) > Mn-2(CO2)(2), consistent with orbit order.
文章类型Article
学科领域Chemistry
DOI10.1039/c5dt00412h
收录类别SCI ; EI
WOS类目Chemistry, Inorganic & Nuclear
WOS记录号WOS:000352784000019
引用统计
被引频次:19[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228299
专题多学科研究中心
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GB/T 7714
Su, F,Lu, LP,Feng, SS,et al. Synthesis, structures and magnetic properties in 3d-electron-rich isostructural complexes based on chains with sole syn-anti carboxylate bridges[J]. DALTON TRANSACTIONS,2015,44(16):7213-7222.
APA Su, F.,Lu, LP.,Feng, SS.,Zhu, ML.,Gao, ZQ.,...&董宇辉.(2015).Synthesis, structures and magnetic properties in 3d-electron-rich isostructural complexes based on chains with sole syn-anti carboxylate bridges.DALTON TRANSACTIONS,44(16),7213-7222.
MLA Su, F,et al."Synthesis, structures and magnetic properties in 3d-electron-rich isostructural complexes based on chains with sole syn-anti carboxylate bridges".DALTON TRANSACTIONS 44.16(2015):7213-7222.
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