If you want to reproduce the whole article If you are the author of this article, you do not need to request permission to reproduce figuresĪnd diagrams provided correct acknowledgement is given. Provided correct acknowledgement is given. If you are an author contributing to an RSC publication, you do not need to request permission To request permission to reproduce material from this article, please go to the Moreover, density functional theory (DFT) calculations (using different methods and basis sets) have been performed on both compounds to obtain the qualitatively theoretical interpretation of the magnetic behaviors.Ĭoligand modifications fine-tuned the structure and magnetic properties of two triple-bridged azido-Cu( II) chain compounds exhibiting ferromagnetic ordering and slow relaxation The heat-capacity experiments further emphasize the characteristic long-range ferromagnetic ordering in 1 and the typical behavior of antiferromagnets in 2.
Although a dominant ferromagnetic coupling between adjacent Cu( II) ions within each chain due to the counter-complementarity of the multiple superexchange pathways is observed in both compounds, the interesting plots of magnetic ordering and slow magnetic relaxation, which are rare in most of the reported azido-Cu( II) architectures, only occur in compound 1, while 2 behaves as an antiferromagnet consisting of ferromagnetic Cu( II) chains. The fine-tuned structures lead to variant magnetic properties in the two title compounds. Single crystal structure analysis demonstrates that the metal cations in the two resulting compounds are connected by the alternating triple-bridge of μ-1,1-azido, syn, syn-carboxylate and μ2-methanol, contributing to analogously linear 1D Cu( II) chain-like motifs with slightly different intrachain and interchain geometric parameters.
Employing two benzoate derivatives with different numbers of non-coordinated fluoro-substituents, 2-fluorobenzoic acid (2-Hfba) and 2,6-difluorobenzoic acid (2,6-Hdfba), two new azido-copper coordination polymers, n ( 1) and n ( 2), have been successfully isolated, and then structurally and magnetically investigated.
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