Synthesis, crystal structure and magnetic property of 30-membered decanuclear manganese metallacrown with N-cyclohexanoylsalicylhydrazide ligand

Du, Kui; Liu, Shixiong; Lin, Bo

doi:10.1016/j.inoche.2019.107606

Cited by 3 publications

(1 citation statement)

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“…Because of their unique structure, metal crown ethers have strong visible absorption spectra and redox properties. They are also widely used in single-molecule magnets (SMMs) and nanomagnetic materials. ,− …”

Section: Introductionmentioning

confidence: 99%

Structure Types and Magnetic Behavior of Cobalt Nanoclusters

Liao

Yang

2021

Inorg. Chem.

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Caprylic hydrazide ligands are ideal ligands for the synthesis of novel polynuclear metal complexes, because they contain many N,O coordination atoms with a strong coordination ability, abundant hydrogen-bond donors, acceptors, and large conjugation systems. Here, we successfully obtained one d o d e c a n u c l e a r c o b a l t n a n o c l u s t e r [Co II 8 Co III 4 (L1) 4 (Py) 12 (CH 3 OH) 4 (CH 3 COO) 4 ]•(CH 3 OH) 13 (1) and one octadecanuclear cobalt nanocluster [Co II 18 (L2) 6 (Py) 48 ]•(DMF) 5 •(CH 3 OH) 8 ( 2) by using H 6 L1 and H 6 L2 ligands, respectively (Py = pyridine; DMF = dimethylformamide). The cyclic cobalt nanocluster 1 can be regarded as two pentanuclear cobalt units (Co 5 (N−N) 4 ) connected by two cobalt ions, and it is a mixed-valent Co nanocluster. Every H 6 L1 ligand contains 10 coordination atoms, each of which coordinates with the Co ions. And every two H 6 L1 ligands form a structure similar to a handshake. The abnormal cylindrical cobalt nanocluster 2 can be regarded six trinuclear cobalt units Co 3 (N−N) 2 connected by one L2 6− ligand, and every L2 6− ligand splits the structure on both sides, with a twisted cyclohexane in the middle. AC magnetic susceptibilities show that nanocluster 1 exhibits no frequencydependent behavior, but nanocluster 2 shows an obviously single-molecule magnetic behavior, and the relaxation process of the energy barrier is 20.4 K.

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