A New Disubstituted Polyacetylene Bearing Pyridine Moieties: Convenient Synthesis and Sensitive Chemosensor toward Sulfide Anion with High Selectivity

作者：Zhang, Liang; Lou, Xiaoding; Yu, Yun; Qin, Jingui; Li, Zhen^*

来源：Macromolecules, 2011, 44(13): 5186-5193.

DOI：10.1021/ma200777e

• HYDROGEN-SULFIDE
• SPECTROPHOTOMETRIC DETERMINATION
• LIQUID-CRYSTALLINE
• CONJUGATED POLYMER
• METAL-IONS
• CYANIDE
• SAMPLES
• WATERS
• POLY(PHENYLACETYLENE)
• ISOMERIZATION

To develop sensitive and selective S2- chemosensors, a new disubstituted polyacetylene (P2) bearing pyridine moieties in the side chains was prepared conveniently through a postfunctional method, the strong green fluorescence of which could be completely quenched by Cu2+ ions at the concentration as low as 2.0 x 10(-6) mol/L in diluted solutions. Based on the displacement strategy, by utilizing the much higher stability constant of the complex of S2- and Cu2+ the quenched fluorescence of the solution of P2 by Cu2+ ions could recover upon the addition of trace S2- anions, with the detection limit down to 5.0 x 10(-7) mol/L. Moreover, no interference were observed from other anions, including SO32-, HSO3-, SO42-, ClO4-, I-, Br-, Cl-, F-, IO3-, HPO42-, PO43-, C2O42-, S2O32-, CO32-, AcO-, CN-, and P2O74-, making P2 a novel, sensitive, and selective sulfide probe.

• 出版日期2011-7-12
• 单位武汉大学