116779-20-5Relevant academic research and scientific papers
A series of [Na2MnII2MnIII6] clusters derived from trigonal bipyramidal [NaMnIIMnIII3] subunits bridged by mono-, di- and tri-fold azide groups: synthesis, crystal str
Liu, Jiang,Suo, Quanling,Song, Jian,Zhang, Lijuan,Gao, Yuanyuan
, p. 34 - 39 (2019)
A series of [Na2MnII2MnIII6] clusters derived from trigonal bipyramidal [NaMnIIMnIII3] subunits bridged by mono-, di- and tri- fold azide groups Na[Na2Mnsu
Octanuclear Ni4Ln4 Coordination Aggregates from Schiff Base Anion Supports and Connecting of Two Ni2Ln2 Cubes: Syntheses, Structures, and Magnetic Properties
Biswas, Mousumi,Ray, Debashis,Sa?udo, E. Carolina
, (2020)
A family of 3d–4f aggregates have been reported through guiding the dual coordination modes of ligand anion (HL?) and in situ generated ancillary bridge driven self-assembly coordination responses toward two different types of metal ions. Reactions of lanthanide(III) nitrate (Ln=Gd, Tb, Dy, Ho and Yb), nickel(II) acetate and phenol-based ditopic ligand anion of 2-[{(2-hydroxypropyl)imino}methyl]-6-methoxyphenol (H2L) in MeCN-MeOH (3 : 1) mixture and LiOH provided five new octanuclear Ni-4f coordination aggregates from two Ni2Ln2 cubanes. Single-crystal X-ray diffraction analysis reveals that all the members of the family are isostructural, with the central core formed from the coupling of two distorted [Ni2Ln2O4] heterometallic cubanes [Ni2Ln2(HL)2(μ3-OH)2(OH)(OAc)4]+ (Ln=Gd (1), Tb (2), Dy (3), Ho (4) and Yb (5)). Higher coordination demand of 4f ions induced the coupling of the two cubes by (OH)(OAc)2 bridges. Variable temperature magnetic study reveals weak coupling between the Ni2+ and Ln3+ ions. For the Tb (2) and Dy (3) analogs, the compounds are SMMs without an applied dc field, whereas the Gd (1) analogue is not an SMM. The observation revealed thus that the anisotropy of the Ln3+ ions is central to display the SMM behavior within this structurally intriguing family of compounds.
Tuning nuclearity of clusters by positional change of functional group: Synthesis of polynuclear clusters, crystal structures and magnetic properties
Gole, Bappaditya,Mondal, Kartik Chandra,Mukherjee, Partha Sarathi
, p. 151 - 164 (2014)
Four neutral polynuclear magnetic clusters, [MnIII 6MnII2NaI2(N 3)8(μ4-O)2(L1) 6(CH3OH)2] (1), [MnIII 6NaI2(N3) 4(μ4-O)2(L2)4(CH 3COO)4] (2), [NiII5(N 3)4(HL1)4(HCOO)2(CH 3OH)2(H2O)2]·2CH 3OH (3) and [NiII4NaI 2(N3)4(HL2)6] ·2CH3OH (4) have been synthesized using tetradentate ligands H2L1-2 along with azide as a co-ligand. H 2L1-2 are the products formed in situ upon condensation of 2-hydroxy-3-methoxybenzaldehyde with 1-aminopropan-2-ol and 1-aminopropan-3-ol, respectively. Single crystal X-ray diffraction and bond valence sum calculation showed that complex 1 is composed of both MnIII and MnII. Complex 3 contains coordinated formate, which was formed upon in situ oxidation of methanol. The magnetic study over a wide range of temperatures of all the complexes (1-4) showed that 1 and 2 are antiferromagnetic whereas other two (3-4) are predominantly ferromagnetic. The estimated ground states of the complexes are S ≈ 3(1), S = 4(2), S = 5(3) and S ≈ 4(4), respectively.
