Electrogenerated chemiluminescent anion sensing: selective recognition and sensing of pyrophosphate.
Recently, significant advances have been made independently in electrogenerated chemiluminescence (ECL) analysis and supramolecular anion sensing. Herein, we demonstrate a new proof of concept for ECL-based pyrophosphate (PPi) sensing, where the emission intensity is changed by electrochemical turn-on. The ECL PPi sensor (1-2Zn) consists of two orthogonally bonded moieties: boron dipyrromethene (ECL reporter) and a phenoxo-bridged bis(Zn(2+)-dipicolylamine) complex (PPi receptor). The presence of PPi is confirmed from the change in the intensity of green ECL generated from the former when PPi is selectively recognized by the latter. During PPi recognition, changes are caused in the electronic states of the receptor, and this stimulates the attenuation of ECL intensity. The electrochemical "on-off" triggering of light emission upon anion binding forms the basis of a new anion sensing strategy. We expect that green-colored ECL sensing would offer an advantage to current ECL analysis.
Shin
Ik-Soo
IS
Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-747, Korea.
Bae
Se Won
SW
Kim
Hasuck
H
Hong
Jong-In
JI
D000588:Amines / Q000737:chemistry; D000838:Anions / Q000032:analysis; D001895:Boron / Q000737:chemistry; D056831:Coordination Complexes / Q000737:chemistry; D011756:Diphosphates / Q000032:analysis*; D055664:Electrochemical Techniques / Q000379:methods*; D008163:Luminescent Measurements / Q000379:methods*; D010848:Picolinic Acids / Q000737:chemistry; D011162:Porphobilinogen / Q000031:analogs & derivatives / Q000737:chemistry; D013816:Thermodynamics; D015032:Zinc / Q000737:chemistry
C501847:2,2'-dipicolylamine; D000588:Amines; D000838:Anions; D056831:Coordination Complexes; D011756:Diphosphates; D010848:Picolinic Acids; C507544:dipyrromethene; D011162:Porphobilinogen; D015032:Zinc; D001895:Boron