A New Mn(Ⅱ) Coordination Polymer: Synthesis, Structure and Magnetic Property  

作　　者：李芬芳 卢丽萍 

机构地区：[1]Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular Engineering of the Education Ministry, Shanxi University [2]College of Chemistry and Chemical Engineering, Jinzhong University

出　　处：《Chinese Journal of Structural Chemistry》2019年第10期1814-1822,1614,共10页结构化学（英文）

基　　金：NSFC(No.21571118)

摘　　要：A new 2D compound,{[Mn6 L3(H2O)8]·0.69(C3 H7 NO)·3.31H2O}n(1,H4 L=1,1’-(1,4-phenylenebis(methylene))bis-(1H-pyrazole-3,5-dicarboxylic acid)),was synthesized and characterized by IR,TGA and X-ray single-crystal/powder diffraction.Compound 1 crystallizes in monoclinic system,space group C2/c with a=26.468(5),b=19.750(4),c=13.660(3)A,β=92.73(3)°,V=7132(2)A^3,Z=4,Mr=1824.12,Dc=1.699 g/cm3,F(000)=3705,R=0.042 and w R=0.117 for 8965 observed reflections(I>2σ(I)).In compound 1,all of the Mn(II)atoms are six-coordinated and take the octahedral geometry of[MnNO5].The 2D compound consists of secondary building unit[Mn3(μ2-O)(R-COO)3](SBU),in which two of the Mn^2+ions exhibit the same coordinated environments while another Mn^2+ion has a different one.The SBUs further connect with each other to form a 1 D inorganic chain which is connected with L^4-ligands to construct a 2D layer.Finally,strong O–H···O hydrogen bonds among the rich carboxyl molecules and O atoms from free DMF and guest water molecules connect the two-dimensional coordination network into a three-dimensional framework.Variable temperature magnetic measurements indicate the antiferromagnetic behavior in the Mn3 core in compound 1.A new 2D compound, {[Mn6 L3（H2O）8]·0.69（C3 H7 NO）·3.31H2O}n（1, H4 L = 1,1’-（1,4-phenylenebis（methylene））bis-（1H-pyrazole-3,5-dicarboxylic acid））, was synthesized and characterized by IR, TGA and X-ray single-crystal/powder diffraction. Compound 1 crystallizes in monoclinic system, space group C2/c with a = 26.468（5）, b = 19.750（4）, c = 13.660（3） ?, β = 92.73（3）°, V = 7132（2） ?3, Z = 4, Mr = 1824.12, Dc = 1.699 g/cm3, F（000） = 3705, R = 0.042 and w R = 0.117 for 8965 observed reflections（I > 2σ（I））. In compound 1, all of the Mn（II） atoms are six-coordinated and take the octahedral geometry of [MnNO5]. The 2D compound consists of secondary building unit [Mn3（μ2-O）（R-COO）3]（SBU）, in which two of the Mn2+ ions exhibit the same coordinated environments while another Mn2+ ion has a different one. The SBUs further connect with each other to form a 1 D inorganic chain which is connected with L4-ligands to construct a 2D layer. Finally, strong O–H···O hydrogen bonds among the rich carboxyl molecules and O atoms from free DMF and guest water molecules connect the two-dimensional coordination network into a three-dimensional framework. Variable temperature magnetic measurements indicate the antiferromagnetic behavior in the Mn3 core in compound 1.

关 键 词：Mn(Ⅱ) compound crystal structure 1 1'-(1 4-phenylenebis(methylene)) bis-(1H-pyrazole-3 5-dicarboxylic acid) magnetic property 

分 类 号：O62[理学—有机化学]