Functionalizing the redox-active tetrathiafulvalene (TTF) core with groups capable of coordination to metals provides new perspectives on the modulation of architectures and electronic properties of organic−inorganic hybrid materials. With a view to extending this concept, we have now synthesized nickel bis(dithiolene-dibenzoic acid), [Ni(C 2 S 2 (C 6 H 4 COOH) 2 ) 2 ], which can be considered as the inorganic analogue of the organic tetrathiafulvalene-tetrabenzoic acid (H 4 TTFTB). Likewise, [Ni(C 2 S 2 (C 6 H 4 COOH) 2 ) 2 ] is a redox-active linker for new functional metal−organic frameworks, as demonstrated here with the synthesis of(2) but is a better electrochemical glucose sensor due to the multiple oxidation−reduction states of the [NiS 4 ] core, which allow glucose to be oxidized to glucolactone by the high oxidation state [NiS 4 ] center. As a non-enzymatic glucose sensor, 1 on Cu foam (CF), 1-CF, was synthesized by a one-step hydrothermal method and exhibited an excellent electrochemical performance. The fabricated 1-CF electrode offers a high sensitivity of 27.9 A M −1 cm −2 , with a wide linear detection range from 2.0 × 10 −6 to 2.0 × 10 −3 M, a low detection limit of 1.0 × 10 −7 M (signal/noise = 3), and satisfactory stability and reproducibility.
The composite membranes with defective metal–organic frameworks (MOFs) show a significant increase in water flux, without compromising the high salt rejection.
A large discrete face-capped tetranuclear iron(II) cage, [Fe 4 L 4 ](BF 4 ) 8 Án(solvent), was synthesised via metal-ion directed self-assembly. The cage is formed from a rigid tritopic ligand that incorporates chelating imidazole-imine functional groups. The cage displays temperature induced spin-crossover and LIESST effects and is amongst the largest iron(II) tetrahedral cages with such properties reported. The synthesis, structure and magnetic properties of this new metallo-cage are presented.
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