Fluorene based electrochromic conjugated polymers: A review

This review briefly describes electrochromic conductive polymers containing fluorene in the main chain or as a subunit/core. According to the arrangement of the fluorene unit and its chemical location on the chain, polyfluorene family was expressed in three classes; fluorene EC homopolymers, copolymers and functional EC polymers. With its sometimes surprising properties and countless advantages, fluorene monomer has many contributions to the electrochromic conductive polymer chain. Although there are many fluorene derived polymers in the literature that have been functionalized and/or used in various applications, this review only found it appropriate to focus on conductive electrochromic polymers with possessing fluorene chemical units. For this purpose, it has been tried to review and comment on fluorene polymers by comparing their chemical, electrochemical and optical properties in a logical framework. One of the biggest problems of electrochromic conductive polymer researchers is to analyze how the redox and electrochromic properties of polymers, which consist of a functional group, change according to the position on the conjugated polymer chain. For this reason, it is thought that the contribution and guideness of this study to the literature will be considerable.