6533b838fe1ef96bd12a3a71
RESEARCH PRODUCT
A conjugated polymer with ethyl 2-(2-(pyridin-2-yl)-1H-benzo[d]imidazol-1-yl) acetate units as a novel fluorescent chemosensor for silver(I) detection
Herbert MeierShuimu LinWei CuiGang XiangLingyun WangLin LiDerong Caosubject
Detection limitMetals and AlloysSonogashira couplingFluoreneConjugated systemCondensed Matter PhysicsPhotochemistryFluorescenceMedicinal chemistrySurfaces Coatings and FilmsElectronic Optical and Magnetic Materialschemistry.chemical_compoundchemistryMaterials ChemistryProton NMRImidazoleElectrical and Electronic EngineeringSelectivityInstrumentationdescription
Abstract A novel conjugated polymer ( P1 ) containing fluorene and ethyl 2-(2-(pyridin-2-yl)-1 H -benzo[ d ]imidazol-1-yl)acetate (PBMA) was designed and successfully synthesized through the Sonogashira coupling reaction. P1 shows high sensitivity and selectivity for Ag + detection in comparison to other metal cations. Upon addition of Ag + , the fluorescent emission of the polymer solution in THF was quenched dramatically, accompanying the color changed from blue to green. The detection limit for Ag + was 5 × 10 −8 mol L −1 . However, the similar copolymers P2 and P3 containing 2-(pyridin-2-yl)-1 H -benzo[ d ]imidazole and 2-(thiophen-2-yl)-1 H -benzo[ d ]imidazole, respectively, did not show such a selectivity for Ag + detection. The 1 H NMR measurements confirmed that the PBMA units play a key role for the selective recognition of Ag + .
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-09-01 | Sensors and Actuators B: Chemical |