213598-63-1Relevant articles and documents
Electron Acceptors of the Fluorene Series. 7.1 2,7-Dicyano-4,5-dinitro-9-X-fluorenes: Synthesis, Cyclic Voltammetry, Charge Transfer Complexation with N-Propylcarbazole in Solution, and X-ray Crystal Structures of Two Tetrathiafulvalene Complexes
Perepichka, Igor F.,Kuz'mina, Lyudmila G.,Perepichka, Dmitrii F.,Bryce, Martin R.,Goldenberg, Leonid M.,Popov, Anatolii F.,Howard, Judith A. K.
, p. 6484 - 6493 (2007/10/03)
The synthesis and physical properties of a series of novel fluorene π-electron acceptors (7-9) are described. Cyclic voltammograms of 7 and 8 exhibit three separate reversible (or quasi-reversible) one-electron redox waves, characteristic of strong electron acceptors. Spectroelectrochemical experiments show the appearance in the long-wavelength visible region of absorption bands at appropriate potentials which were attributed to the transformations A → A.- and A.- → A2-. Charge-transfer complexation with N-propylcarbazole in dioxane shows the formation of 1:1 complexes with parameters characteristic for other fluorene acceptors. The single-crystal X-ray structures of 1:1 charge-transfer complexes of tetrathiafulvalene with the electron acceptor 8 and with the strongest fluorene acceptor If both show ...A...D...A...D... stacking in the crystal.
