Antiferromagnetic Interaction Achieved by a 3-D Supramolecular Cu^II Complex with Pyrazino-Fused TTF as the Ligand, [CuCl₂(BP-TTF)]

Abstract

The diffusion reaction of TBA2Cu(II)Cl4 (TBA = tetrabutylammonium) and a N-containing organic donor, BP-TTF [=bis(pyrazino)tetrathiafulvalene], yielded a 3-D supramolecular Cu complex, [CuCl2(BP-TTF)] (1). The magnetic measurement of 1 exhibits an antiferromagnetic interaction by fitting a Bonner-Fisher model from 2 to 300 K with S = 1/2 and J = -3.5 K between Cu(IotaIota) mediated by self-assembling donor columns.

Tetrathiafulvalene-based group XV ligands: Synthesis, coordination chemistry and radical cation salts

“…For instance, a potential difference of 670 mV is observed between the first oxidation potential of TTF (E 1 = 0.35 V vs. SCE in C 6 H 5 CN) with the one of bis-pyrazino-fused TTF 75 (E 1 = 1.02 V vs. SCE in C 6 H 5 CN) [64]. This strong anodic shift of the oxidation potential of the bis(pyrazino) and the pyrazino-fused TTFs allowed for the coordination of these derivatives with Cu 2+ ions, as charge transfer could not occur [72]. On the other hand, pyrazine groups linked to the TTF core through a non-conjugated spacer group such as thiomethyl one, only weakly modify the electron donating ability of the donor core (Table 8).…”

“…Copper complexes were obtained by cocrystallization with CuCl 2 to afford respectively Cu12 (75·CuCl 2 ) [72], Cu13 (80a·CuCl 2 ) [71], or Cu14 (80a 2 ·80a·Cu 3 Cl 4 ) [71].…”

Current advances in fused tetrathiafulvalene donor–acceptor systems

“…Besides ruthenium coordination complexes, the binding ability of TTF ligands with a fused D-A structure to d-metal ions has also been explored for the development of dual-property molecular materials exhibiting the enhancement of p-d interactions. 33,34 It has been demonstrated that TTF-based ligands act as efficient charge-transfer antennas for the sensitization of Yb 3+ and Er 3+ NIR luminescence 35,36 and a dinuclear Dy(III) complex bearing two electroactive functionalized TTFs behaves as a single molecule magnet. 37 Consequently, synthesis, structures and properties of some lanthanide complexes with TTF-dppz have been described.…”

Syntheses, crystal structures and luminescent properties of six new d10 transitional metal coordination polymers based on bis(benzimidazole) ligands

“…[1][2][3][4][5][6][7]. Nowadays, much effort has been carried out in this filed and some complexes with excellent properties have been obtained [8][9][10][11][12].…”