Zhao, Jiong-Peng published the artcileTunable Ferromagnetic Strength in Niccolite Structural Heterometallic Formate Framework Based on Orthogonal Magnetic Orbital Interactions, Safety of N-Methylformamide, the main research area is niccolite structural heterometallic formate framework tunable ferromagnetism magnetocaloric effect.
A series of heterometallic formate framework templated by amines were solvothermally prepared They feature the formula of [AI][CrMII(HCO2)6] (AI = NH4H2OI and M = Mn for 1, AI = CH3NH3I and M = Fe for 2, AI = CH3NH2CH3I and M = Co for 3, AI = CH3NH3I and M = Ni for 4). The title compounds exhibit isostructural niccolite architectures with differences only in the host metal ions and guest amines. Tunable ferromagnetic (FO) strength was realized in the resulting framework under the guidance of orthogonal magnetic orbital anal. of CrIII (t2g3eg) and MII (t2g3eg2 for MnII, t2g4eg2 for FeII, t2g5eg2 for CoII, t2g6eg2 for NiII) ions. The magnetic ordering temperatures derived from the exptl. magnetic measurements for 1-4 are lower than 2, 10.3, 7.6, and 22.0 K, resp. Notably, thanks to the weak FO coupling between CrIII and MnII ions, compound 1 displays a large magnetocaloric effect bearing the maximum of magnetic entropy change (-ΔSmmax) up to 43.9 J kg-1 K-1 with ΔH = 7 T and T = 3.5 K, larger than most reported transition metal-based complexes and com. gadolinium gallium garnet (Gd3Ga5O12) (-ΔSmmax = 38.4 J kg-1 K-1 with ΔH = 7 T). From 1, 2/3, to 4, an enhancement of the magnetic ordering temperature is observable due to the increasing strength of FO interactions between CrIII and MII ions. Our work provides a successful instance to modulate the strength of FO exchange via analyzing the orthogonal magnetic orbitals of heterometallic ions.
Inorganic Chemistry published new progress about Crystal structure. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Safety of N-Methylformamide.
Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics