Ferrocenyl-triazolyl-tetrathiafulvalene assemblies: synthesis and electrochemical recognition properties
作者:Bang-Tun Zhao、Lian-Wei Liu、Xiao-Chuan Li、Gui-Rong Qu、Esmah Belhadj、Franck Le Derf、Marc Sallé
DOI:10.1016/j.tetlet.2012.10.107
日期:2013.1
Cu(I)-catalyzed Huisgen–Meldal–Sharpless type dipolar ‘click’ reactions between azido-tetrathiafulvalene derivatives and ethynylferrocene yield the first examples of ferrocenyl-1,2,3-triazolyl-tetrathiafulvalene assemblies (4a, 4b). The electrochemical behavior of 4a and 4b, which integrate two distinctive redox probes, has been investigated, and their binding ability for various transition-metal cations
In this work, two series of tetrathiafulvalene (TTF) and thiacalix[4]arene (TCA) conjugates (TTFTCA) were designed by CuAAC click reactions. The results obtained from NMR and H-1 NMR NOE indicated that their conformations of thiacalix[4]arene framework may prefer to 1,3-alternate. The cyclic voltammograms of four TTFTCA compounds containing electroactive TTF units were provided. Meanwhile, their intermolecular electron-transfer (ET) behaviors with tetrachlorobenzoquinone (Q) mediated by different metal ions, Sc3+, Pb2+, Ag+, Cd2+, and Zn2+, in CH3CNCH2Cl2 (V/V = 1:1) solution were studied and analyzed via UVvis spectroscopy. It was determined that intermolecular ET between each TTFTCA and Q ensemble was not observed without introduction of the metal ions mentioned above. The added specified metal ions most likely induced the intermolecular ET between TTFTCA and Q ensemble, and the effects of Sc3+ functions were the most imperative. The intermolecular ET also proved to be reliant on the structure of TTFTCA, where TTFTCA 7a and 7b were more effective than TTFTCA 6a and 6b. The difference may be credited to TTFTCA 7a or 7b possessing two independent TTF pendants and providing a more synergic coordination among the TTF radical cation and Q radical anion with a metal ion.