(Ferrocenylmethyl)trialkyl ammoniums as template cations in optically active two-dimensional oxalate bridged [Cr–Mn] and [Cr–Ni] molecule-based magnets: synthesis and magnetic properties

Enantiospecific Synthesis of Δ and Λ [Ru(bpy)2ppy]+ and [Ru(bpy)2quo]+ (bpy = 2,2‘-Bipyridine, ppy = Phenylpyridine-H+, quo = 8-Hydroxyquinolate): 1H and 13C NMR Studies and X-ray Structure Determination of rac-[Ru(bpy)2quo]PF6

“…In the flourishing research in the field of polyfunctional materials, we are currently investigating the rational design of optically active molecular-based magnets . These materials are bimetallic oxalato-bridged anionic frameworks of the general formula {[M III M II (C 2 O 4 ) 3 ] n } n - , in which the negative charge is balanced by a monocationic counterpart.…”

“…These materials are bimetallic oxalato-bridged anionic frameworks of the general formula {[M III M II (C 2 O 4 ) 3 ] n } n - , in which the negative charge is balanced by a monocationic counterpart. Furthermore, to achieve three-dimensional (3D) structures, the chiral template cation and the anionic block [M III (C 2 O 4 )] 3- must have both a quasi- D 3 symmetry. 1a,b According to these requirements, our attention was focused on ruthenium(II) hexacoordinated salts. Such complexes, with three bidentate bipyridyl ligands either substituted or not, are largely described in the literature .…”

Chiral Templating Activity of Tris(bipyridine)ruthenium(II) Cation in the Design of Three-Dimensional (3D) Optically Active Oxalate-Bridged {[Ru(bpy)3][Cu2xNi2(1-x)(C2O4)3]}n(0 ≤x≤ 1; bpy = 2,2‘-bipyridine): Structural, Optical, and Magnetic Studies

“…25,26 Different synthetic strategies were recently designed and developed to introduce chirality in the network through either chiral ligands (including radicals) 2-8 or the helicoidal chirality of the metallic center. 7,8,14,15,23 Among them, studies on oxalate-based networks have shown that these compounds are good candidates to design two-and three-dimensional multifunctional magnets [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] and are promising systems 14,15,23 for the study of cross-effects such as magneto-chiral dichroism. 25,26 From a structural point of view, oxalate-based magnets are known as 3D 9-15 or 2D [16][17][18][19][20][21][22][23] networks.…”

“…7,8,14,15,23 Among them, studies on oxalate-based networks have shown that these compounds are good candidates to design two-and three-dimensional multifunctional magnets [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] and are promising systems 14,15,23 for the study of cross-effects such as magneto-chiral dichroism. 25,26 From a structural point of view, oxalate-based magnets are known as 3D 9-15 or 2D [16][17][18][19][20][21][22][23] networks. In the latter case, the 2D honeycomb anionic network can accommodate numerous types of cations to compensate its charge.…”

“…Moreover, starting from racemic tris(oxalato)chromate(III) building blocks and optically active ruthenium cations, Andre ´s et al showed that the ruthenium cations play a chiral template effect leading to optically active 3D compounds. 15 In tris(oxalato)chromate-(III) and tris(oxalato)ferrate-(III)-based magnets, long-range magnetic ordering appears between 5.3 and 44 K. [14][15][16]18,23 To exploit more easily the multifunctionality of these compounds, it would be important to enhance their critical temperature. Modifying the metal ions bridged by the ligand in a rational way has been shown to be a powerful pathway toward high-temperature molecule-based magnets.…”