An unprecedented {Gd18} nanowheel was solvothermally synthesized with a novel diacylhydrazone ligand. It features a rare single-stranded skeleton just like a Reuleaux triangle with vertices buckled in, represents the highest nuclearity and largest size in lanthanide (Ln) wheels reported so far, and shows a large magnetocaloric effect (MCE).

Key indicatorsSingle-crystal X-ray study T = 291 K Mean (C-C) = 0.003 Å R factor = 0.023 wR factor = 0.061 Data-to-parameter ratio = 17.1 For details of how these key indicators were automatically derived from the article, see

An intuitional hierarchical assembly, metaphorically referred to as a "blossom and yield fruit" process, from a discrete cluster {[Co14(CH3O)4(dpbt)6Cl12]·14CH3OH, ()} to 2D cluster organic frameworks {[Co14(CH3O)10(dpbt)6 Cl6]·12CH3OH, ()}, has been established. The magnetic ordering of was obviously improved compared with .

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We present the synthesis, structural characterization, and magnetic properties of two high-nuclearity cobalt clusters formulated as [Co(μ-OH)(μ-Cl)(dpbt)(ptd)Cl][Co(HO)Cl]·(CH)CHOH (1) and [Co(μ-OH)(μ-Cl)(dpbt)(ptd)Cl]·2CHCHOH (2), respectively (Hdpbt = 5,5'-bis(pyridin-2-yl)-3,3'-bis(1,2,4-triazole) and Hptd = 3-(pyridin-2-yl)-1,2,4-triazine-5,6-diol). Compound 1 is composed of an inner [Co(μ-OH)(μ-Cl)] cubane and an outer [Co(dpbt)(ptd)Cl] defective adamantane. Compound 2 reveals a giant {Co} cluster possessing a dual-[Co] skeleton from 1. The hierarchical assembly from 1 to 2 has been established and tracked through high-resolution electrospray ionization (HRESI-MS) analyses from the solvothermal reaction mother solution. Magnetic studies of 1 and 2 revealed the highly correlated spins, a glasslike magnetic phase transition at ca. 8 K, and slow relaxation behavior of SMM nature in the lower-temperature region (below 4 K).

We report here a zinc2+-dpbt MOF with luminescence sensing properties for the detection of Cu2+, Ag+, MnO4− and Cr(vi) (Cr2O72−, CrO42−) ions.

The preparations via variation of the reactive conditions of the same metal-to-ligand ratios of Co(NO3)2·6H2O with mixed l-cysteic acid (H2cys) and 4,4′-bipyridine (bpy) ligands gave rise to two interesting pillared supramolecular isomers: {[Co2(cys)2(bpy)2(H2O)2]·3H2O} n (1) and {[Co2(cys)2(bpy)(H2O)4](bpy)·H2O} n (2), which have the same formula but distinct solid phases. In the two complexes, Co(II) centers are chelated and bridged by different μ 2 -cys bridges to form a one-dimensional (1D) 41 helical chain and a 1D zigzag chain, respectively. The two chains are further linked by bpy pillars into a novel three-dimensional (42.84)-lvt structrue (1) and a two-dimensional brick-wall structure (2), respectively. The magnetic behavior of compounds 1 and 2 was studied, and it indicated the existence of small antiferromagnetic coupling. Best fit parameters for 1: J = −0.14 K with R = 4.77 × 10−4; for 2, J = −0.64 K with R = 3.62 × 10−4.