Optical and electronic properties of fluorene-based copolymers and their sensory applications
Author
Ibrahimova, V.
Kocak, M. E.
Önal, A. M.
Tuncel, D.
Date
2013Source 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
ArticleItem Usage Stats
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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.