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Controlling the photoluminescence of water‐soluble conjugated poly[2‐(3‐thienyl)ethyloxy‐4‐butylsulfonate)] for biosensor applications
Author(s) -
LópezCabarcos Enrique,
Retama Jorge Rubio,
Sholin Veronica,
Carter Sue Ann
Publication year - 2007
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.2140
Subject(s) - pulmonary surfactant , aqueous solution , photoluminescence , luminescence , polymer , quenching (fluorescence) , cationic polymerization , polymer chemistry , chemistry , polyelectrolyte , materials science , photochemistry , fluorescence , organic chemistry , biochemistry , physics , optoelectronics , quantum mechanics
Abstract The photoluminescence of poly[2‐(3‐thienyl)ethyloxy‐4‐butylsulfonate)] (PTE‐BS) in aqueous solution increases threefold on addition of the surfactant tetrabutylammonium perchlorate (TBA). Furthermore, the luminescence of the PTE‐BS/TBA system is reduced by more than five times by the addition of small amounts of the cationic electron acceptor methyl viologen (MV 2+ ). The Stern–Volmer constant K SV = 1.4 × 10 4 L mol −1 for the quenching of the polymer–surfactant complex by MV 2+ is approximately 60 times smaller than the K SV = 8.4 × 10 5 L mol −1 obtained in water polymer solutions without surfactant. Thus, the luminescence of PTE‐BS in aqueous solution can be modulated by complexing the polymer either with a surfactant or with a quencher. In this contribution we show that the surfactant/quencher tuning effect found in polymers of the phenylenevinylene family, such as poly(2,5‐methoxy‐propyloxysulfonate phenylenevinylene), also appears in polymers of the thiophene family such as PTE‐BS. Copyright © 2007 Society of Chemical Industry