Synthesis, crystal structure and physical properties of two new donor molecules

Two ethylenedioxytetrathiafulvalenes substituted with a pyridinyl (Py) group (EDO-TTF-A) [A = 3-Py (1) and A = 4-Py (2)] have been synthesized to clear the nature of the donor–acceptor interaction between the TTF unit and a pyridine group, and characterized by 1H NMR, mass spectra, elemental analyses and X-ray analysis. Cyclic voltammetry measurements show two steps of one-electron reversible waves with redox potentials comparable to other pyridine-substituted TTF derivatives, suggesting that these donor molecules, are much expected to produce a new π/d system by complexation with d-spin carrying metal ions.