A new mononuclear complex Cu(tdp)Br2·MeCN (1, tdp = 2,2′-(1H-1,2,3-triazole-1,4-diyl)dipyridine) has been synthesized, which can transform to a 1D coordination polymer [Cu(tdp)Br2]n (2) under ambient conditions through an irreversible single-crystal-to-single-crystal transformation process. The loss of lattice MeCN molecules in 1 was accompanied by the generation of new covalent bonds and an increase in dimensionality from 0 to 1D, leading to a change in magnetic exchange couplings between the adjacent Cu(II) ions. Magnetic susceptibility measurements indicate that 1 exhibits ferromagnetic interactions between the adjacent Cu(II) centers, while the intrachain magnetic interactions between Cu(II) ions are antiferromagnetic within 2.

中文翻译：

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以 1,2,3-三唑衍生物为配体的铜 (II) 配合物的合成、结构和磁性能：铜 (II) 从单核到聚合物配合物的单晶到单晶转变

合成了一种新的单核配合物 Cu(tdp)Br2·MeCN (1, tdp = 2,2'-(1H-1,2,3-triazole-1,4-diyl)dipyridine)，它可以转化为一维配位聚合物 [Cu(tdp)Br2]n (2) 在环境条件下通过不可逆的单晶到单晶转变过程。1 中晶格 MeCN 分子的丢失伴随着新共价键的产生和维数从 0 到 1D 的增加，导致相邻 Cu(II) 离子之间的磁交换耦合发生变化。磁化率测量表明，1 在相邻的 Cu(II) 中心之间表现出铁磁相互作用，而 Cu(II) 离子之间的链内磁相互作用在 2 内是反铁磁的。