Synthesis and redox properties of π-conjugated 4,5-diazafluorene derivatives incorporating 9-cyanomethylene moiety as an electron acceptor
作者:Katsuya Sako、Yasufumi Mugishima、Tetsuo Iwanaga、Shinji Toyota、Hiroyuki Takemura、Motonori Watanabe、Teruo Shinmyozu、Michito Shiotsuka、Hitoshi Tatemitsu
DOI:10.1016/j.tetlet.2011.08.164
日期:2011.11
We have synthesized pi-conjugated acceptor-type molecules 3a-d containing a cyanomethylene unit as the electron acceptor site and a 4,5-diazafluorene ligand for metal complexation. In the crystal, the planar 3a molecules stack along the b axis in the head-to-tail fashion. Compound 3a shows distinctive electrochromism ;and its three differently colored redox states (dianion (3(2-)), anion radical (3(center dot-)), neutral (3)) exhibit remarkable stability. (C) 2011 Elsevier Ltd. All rights reserved.