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Name pinyin
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070301 无机化学
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07 理学
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构筑了四例金属环状配合物:[M4(bpz*tz·-)4(N3)4] (M = Ni, 1; Mn, 2)[Ni3(bpz3Phtz·-)3(pz3Ph(Cl)tz·-)3]·sol (3) [Ni4(pydz)4(N3)4] [BPh4]4·2CH3CN (4)。其中配合物12为四嗪自由基和EO-叠氮桥混桥构筑的平面四方分子,其变温直流磁化率显示金属与自由基之间为强铁磁耦合,1中磁耦合常数达到90.8 cm-1;配合物3是由两种不同四嗪自由基构筑而成的平面三角形分子,磁性研究表明,Ni(II)离子与端基四嗪自由基为反铁磁耦合,而与桥连四嗪自由基之间为强的铁磁耦合。

构筑了两例四嗪自由基和EO-叠氮离子桥连的钴基平面四方分子配合物:[Co4(L)4(N3)4]·sol (L = bpz3phtz·-, 5; L = bpzItz·-, 6)。磁性研究表明,这两例配合物均为单分子磁体。其中5在零场下量子隧穿严重,而在外加500 Oe磁场下,表现出缓慢的磁弛豫行为,有效能垒(Ueff/KB)29.4 K,弛豫时间(τ0)9.2 × 10-9 s。配合物6在零场下表现出慢磁弛豫行为,其有效能垒为25.1 K;在优化场下,其有效能垒达到52.5 K,磁弛豫时间为1.27 × 10-10 s

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References List

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GB/T 7714
王特. 基于四嗪自由基配体的过渡金属簇合物的超分子组装和磁性研究[D]. 深圳. 南方科技大学,2022.
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