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Facile Synthesis of Fluorescent Conjugated Polyelectrolytes Using Polydentate Sulfonate as Highly Selective and Sensitive Copper(II) Sensors
journal contribution
posted on 2017-08-10, 00:00 authored by Wei Wu, Anting Chen, Linyue Tong, Ziqi Qing, Kevin P. Langone, William E. Bernier, Wayne E. JonesFluorescent conjugated
polyelectrolytes represent an exciting area
of research into new chemosensors. By virtue of their rapid electron
and energy transfer paths, these highly correlated, one-dimensional
systems have been depicted as “molecular wires” and
show “million-fold” sensitivity compared to monomolecular
sensor analogs. In this paper, a novel polyelectrolyte sensor, the
ttp-PPESO3, has been designed by incorporating terpyridine
and sulfonate functional groups into the polyelectrolyte. This specifically
tailored sensor has displayed remarkable quenching response toward
copper(II) with a detection limit of 14.7 nM (0.93 ppb). It is capable
of selectively screening copper without interference from 12 common
cations. Molecular modeling suggests that binding occurs through a
coordination interaction of the terpyridine and sulfonate. The additional
multidentate nature from the sulfonate offers extraordinary chelating
ability to the analyte. We anticipate that this unique binding mode
will provide insight for the design of future more sensitive and selective
systems.
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coordination interactionFluorescent Conjugated Polyelectrolytesmonomolecular sensor analogsMolecular modelingchelating abilitydetection limitPolydentate Sulfonatebinding modequenching responseFacile Synthesisscreening coppermultidentate naturettp-PPESO 3energy transfer pathsnovel polyelectrolyte sensorterpyridinesulfonate
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