Synthesis, Structure, and Magnetic Properties of a Novel Polyoxometalate–Organic Framework with Unusual (5,6)-Connected Topology
Synthesis, Structure, and Magnetic Properties of a Novel Polyoxometalate–Organic Framework with Unusual (5,6)-Connected Topology
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DOI：
10.1021/cg200791k
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发表时间：
2011-10
影响因子：
3.8
通讯作者：
Yiming Xie;R. Yu;Xiaoyuan Wu;Fei Wang;Jian Zhang;Canzhong Lu
中科院分区：
文献类型：
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作者：
Yiming Xie;R. Yu;Xiaoyuan Wu;Fei Wang;Jian Zhang;Canzhong Lu
用水热法合成了一种新型的三维多金属氧酸盐有机骨架[Cu2(4，4‘-bpz)4(Cu2Mo6O22)]n(1)，并对其结构进行了表征。两个[Cu2Mo6O22]4-多金属氧酸盐单元通过两个Cu2+离子连接成沿b轴排列的聚合链，得到的链进一步通过4，4‘-bpz(4，4’-bpz=3，3‘，5，5’-四甲基-4，4‘-联吡唑)配体相互连接成具有有趣的(5，6)连接拓扑的三维骨架。1的变温磁性研究表明，存在四个独立的Cu2+中心，它们之间存在弱的铁磁耦合行为。
A novel three-dimensional (3D) polyoxometalate–organic framework [Cu2(4,4′-bpz)4(Cu2Mo6O22)]n (1) with unprecedented transition metal substituted octametalates has been hydrothermally synthesized and structurally characterized. Two [Cu2Mo6O22]4– polyoxometalate units are linked by two Cu2+ ions into a polymeric chain running along the b-axis, and the resulting chains are further interconnected by 4,4′-bpz (4,4′-bpz = 3,3′,5,5′-tetramethyl-4,4′-bipyrazole) ligands into a 3D framework with interesting (5,6)-connected topology. The variable temperature magnetic study of 1 indicates the presence of four independent Cu2+ centers and a weak ferromagnetic coupling behavior between them.