@article{oai:soar-ir.repo.nii.ac.jp:00019884,
 author = {Shoji, Taku and Maruyama, Akifumi and Yaku, Chisa and Kamata, Natsumi and Ito, Shunji and Okujima, Tetsuo and Toyota, Kozo},
 issue = {1},
 journal = {CHEMISTRY-A EUROPEAN JOURNAL},
 month = {Jan},
 note = {Aryl-substituted 1,1,4,4-tetracyano-1,3-butadienes (FcTCBDs) and bis(1,1,4,4-tetracyanobutadiene)s (bisFcTCBDs), possessing a ferrocenyl group on each terminal, were prepared by the reaction of a variety of alkynes with tetracyanoethylene (TCNE) in a [2+2] cycloaddition reaction, followed by retro-electrocyclization of the initially formed [2+2] cycloadducts (i.e., cyclobutene derivatives). The characteristic intramolecular charge transfer (ICT) between the donor (ferrocene) and acceptor (TCBD) moieties were investigated by using UV/ Vis spectroscopy. The redox behaviors of FcTCBDs and bis-FcTCBDs were examined by cyclic voltammetry (CV) and differential pulse voltammetry (DPV), which revealed their properties of multi-electron transfer depending on the number of ferrocene and TCBD moieties. Moreover, significant color changes were observed by visible spectroscopy under the electrochemical reduction conditions., Article, CHEMISTRY-A EUROPEAN JOURNAL. 23(21):402-409 (2015)},
 pages = {402--409},
 title = {Synthesis, Properties, and Redox Behavior of 1,1,4,4-Tetracyano-2-ferrocenyl-1,3-butadienes Connected by Aryl, Biaryl, and Teraryl Spacers},
 volume = {21},
 year = {2015}
}