Supramolecular heptanuclear Ln–Cu complexes involving nitronyl nitroxide biradicals: structure and magnetic behavior

Abstract

Four novel heptanuclear Ln–Cu complexes with formula [Ln2Cu(hfac)8(NITPhTzbis)2][LnCu(hfac)5(NITPhTzbis)]2 (LnCu = YCu 1, TbCu 2, DyCu 3 and HoCu 4; hfac = hexafluoroacetylacetonate) were successfully constructed by employing the triazole functionalized...

Blue-Emitting Ligand-Mediated Assembly of Rare-Earth MOFs toward White-Light Emission, Sensing, Magnetic, and Catalytic Studies

“…This value remains unchanged when T is reduced to about 50 K, and at lower temperatures, a slight decrease is observed, reaching 11.7 cm 3 mol –1 K for 2 K. The field dependence of the magnetization (Figure b) indicates a saturation magnetization of about 14 μ B , with no feature in the low field range. These magnetic behaviors are characteristic of two weakly exchange-coupled magnetic centers …”

“…These magnetic behaviors are characteristic of two weakly exchange-coupled magnetic centers. 111 Modeling was performed by considering two interacting Gd(III) centers; the simultaneous analysis of χ M T = f(T) and M = f(H) (red line in Figure 11) gave J = −0.06 cm −1 with g = 1.97 (reference Hamiltonian: H = −JS Gd1 •S Gd2 ), thus confirming the very weak antiferromagnetic Gd−Gd interaction.…”

Structure and assembly mechanism of a centipede-shaped high-nuclear Dy14Cu12heterometallic nanocluster

“…Lanthanide-containing high-nuclear clusters are attracting increasing interest due to their aesthetic nano-scaled structures and their potential applications in fields such as catalysis, information storage, optical devices, and bioactivity. [1][2][3][4][5][6][7] However, reasonable design and assembly of these clusters are still a huge challenge due to diverse coordination configurations of lanthanide ions and their variable self-assembly pathways. The common method is to assemble metal ions into the anticipated structures using well-designed organic ligands with a special geometry and size and multiple coordination groups which contribute a significant role in the construction of high-nuclear heterometallic clusters.…”

Design of Heterometallic {LnIII–MV} (Ln = Dy, Er; M = W, Mo) Molecular Nanomagnets: Protonation Induced Structural Diversification

“…The search of novel molecular magnetic materials that display versatile topologies and fascinating magnetic properties is a hot topic in the fields of chemistry and materials science. − Among them, molecular nanomagnets, including discrete single-molecule magnets (SMMs) , and one-dimensional single-chain magnets (SCMs), − which can exhibit both the classical bulk-magnet behaviors and quantum properties at the nanoscale, are promising for applications in high-density data storage, , quantum computing, spintronic devices, , and many other fields. − Benefiting from the advancements in molecular engineering and crystal engineering, molecular nanomagnets can be programmed at the molecular level through the rational selection of various spin carries including paramagnetic metal ions and organic radicals. , And the connections and arrangements of these spin carriers can be altered by applying different bridging ligands and metal-based building blocks. − As such, exploring high-performance SMMs and SCMs, revealing the relationships between molecular structures and magnetic properties, and establishing effective strategies for precise regulation of structures and properties as well as other functions are becoming key goals but are still challenging in the field of molecular magnetism. , …”

“…13−17 Benefiting from the advancements in molecular engineering and crystal engineering, molecular nanomagnets can be programmed at the molecular level through the rational selection of various spin carries including paramagnetic metal ions and organic radicals. 18,19 And the connections and arrangements of these spin carriers can be altered by applying different bridging ligands and metal-based building blocks. 20−32 As such, exploring high-performance SMMs and SCMs, revealing the relationships between molecular structures and magnetic properties, and establishing effective strategies for precise regulation of structures and properties as well as other functions are becoming key goals but are still challenging in the field of molecular magnetism.…”