Sensing of aqueous phosphates by polymers with dual modes of signal transduction.
A new approach to sensing of aqueous phosphate-related anions based on chromogenic conductive polymers is demonstrated. This method utilizes synergy between low-level p-doping in a polythiophene polymer and hydrogen bonding to increase anion-sensor affinity. These chromogenic conductive polymers show anion-specific changes both in color and in conductivity upon increasing concentration of anions, thus providing two independent modes of signal transduction.
Aldakov
Dmitry
D
Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, USA.
Anzenbacher
Pavel
P
D015374:Biosensing Techniques / Q000379:methods*; D006860:Hydrogen Bonding; D010755:Organophosphates / Q000032:analysis*; D010710:Phosphates / Q000032:analysis*; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D011199:Potentiometry / Q000379:methods; D011810:Quinoxalines / Q000138:chemical synthesis / Q000737:chemistry*; D013876:Thiophenes / Q000737:chemistry
D010755:Organophosphates; D010710:Phosphates; D011108:Polymers; D011810:Quinoxalines; D013876:Thiophenes; C066730:polythiophene