Effective switch-on fluorescence sensing of zinc(II) ion by 8-aminoquinolino-beta-cyclodextrin/adamantaneacetic acid system in water.
A water-soluble 8-aminoquinolino-beta-cyclodextrin/1-adamantaneacetic acid (1/ADA) system is prepared in situ and exhibits a unique switch-on fluorescence response to Zn(2+) over other common metal ions. Spectrophotometric studies demonstrate that this system can strongly coordinate Zn(2+) through a cyclodextrin/substrate/metal triple recognition mode, and the resulting 1/ADA/Zn(2+) ternary complex emits the blue-green fluorescence (lambda=490nm) that can be easily distinguished by eyes in aqueous solution. Significantly, the switch-on fluorescence response of 1/ADA to Zn(2+) is barely affected by various metal ions except Cu(2+). As a result, this system can behave as an efficient supramolecular fluorescence sensor for Zn(2+) in water.
Chen
Yong
Y
Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, PR China.
Han
Kun-Ying
KY
Liu
Yu
Y
D000085:Acetates / Q000138:chemical synthesis / Q000737:chemistry*; D000218:Adamantane / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry; D000634:Aminoquinolines / Q000138:chemical synthesis / Q000737:chemistry*; D005453:Fluorescence; D007202:Indicators and Reagents; D008958:Models, Molecular; D015203:Reproducibility of Results; D013050:Spectrometry, Fluorescence; D014867:Water / Q000737:chemistry; D015032:Zinc / Q000737:chemistry*; D047392:beta-Cyclodextrins / Q000138:chemical synthesis / Q000737:chemistry*
C507636:1-adamantaneacetic acid; C521682:8-aminoquinolino-beta-cyclodextrin; D000085:Acetates; D000634:Aminoquinolines; D007202:Indicators and Reagents; D047392:beta-Cyclodextrins; D014867:Water; D015032:Zinc; D000218:Adamantane