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A 3D mixed-valence Co(III)–Co(II) compound [Co9(bta)10(Hbta)2(H2O)10]n·[22(H2O)]n(1)(H2bta=N,N-bis(1H-tetrazole-5-yl)-amine) was hydrothermally synthesized by reaction of Co(NO3)2·6H2O with H2bta·H2O. Compound 1 consists of three kinds of distorted-octahedral [CoII(N4O2)] paramagnetic nodes which are separated by [CoIII(bta)2(Hbta)]2-/[CoIII(bta)3]3-diamagnetic linkers to generate a 3D porous metal-organic framework(MOF) with alternative ···Co(III)···Co(II)··· array and channels incorporating water molecules. Under an applied magnetic field of 4000 Oe, compound 1 exhibits slow relaxation of magnetization at low temperatures, giving △E/kB=30.00 K and τ0=2.0×10-8 s.
A 3D mixed-valence Co (III) -Co (II) compound [Co9 (bta) 10 (Hbta) 2 (H2O) 10] n · [22 (H2O)] n (1H-tetrazole-5-yl) -amine was hydrothermally synthesized by reaction of Co (NO3) 2 · 6H2O with H2bta · H2O. Compound 1 consists of three kinds of distorted-octahedral [CoII (N4O2)] paramagnetic nodes which are separated by [CoIII (bta) 2 (Hbta)] 2 - / [CoIII (bta) 3] 3-diamagnetic linkers to generate a 3D porous metal-organic framework (MOF) with alternative Under an applied magnetic field of 4000 Oe, compound 1 exhibits slow relaxation of magnetization at low temperatures, giving ΔE / kB = 30.00 K and τ0 = 2.0 × 10 -8 s.