Optical and electronic properties of fluorene-based copolymers and their sensory applications

Date
2013
Authors
Ibrahimova, V.
Kocak, M. E.
Önal, A. M.
Tuncel, D.
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
Source Title
Journal of Polymer Science, Part A: Polymer Chemistry
Print ISSN
0887-624X
Electronic ISSN
1099-0518
Publisher
John Wiley & Sons, Inc.
Volume
51
Issue
4
Pages
815 - 823
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
Series
Abstract

A series of novel, fluorene-based conjugated copolymers, poly[(9,9-bis{propenyl}-9H-fluorene)-co-(9,9-dihexyl9H-fluorene)] (P1), poly[(9,9-bis{carboxymethylsulfonyl-propyl}- fluorenyl-2,7-diyl)-co-(9,9-dihexyl-9H-fluorene)] (P2) and poly[(9,9- dihexylfluorene)-co-alt-(9,9-bis-(6-azidohexyl)fluorene)] (P3), are synthesized by Suzuki coupling reactions and their electrochemical properties, in the form of films, are investigated using cyclic voltammetry. The results reveal that the polymer films exhibit electrochromic properties with a pseudo-reversible redox behavior; transparent in the neutral state and dark violet in the oxidized state. Among the three polymers, P2 possesses the shortest response time and the highest coloration efficiency value. These polymers emit blue light with a band gap value of around 2.9 eV and have high fluorescent quantum yields. Their metal ion sensory abilities are also investigated by titrating them with a number of different transition metal ions; all of these polymers exhibit a higher selectivity toward Fe3þ ions than the other ions tested with Stern–Volmer constants of 4.41 106 M1 , 3.28 107 M1 , 1.25 106 M1 , and 6.56 106 M1 for P1, P2, water soluble version of P2 (P2S) and P3, respectively.

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Book Title
Keywords
Electrochromism, Fluorene-based polymers, Fluorescence, Ion sensing
Citation
Published Version (Please cite this version)