Selective sensing of Fe3+ based on fluorescence quenching by 2,6-bis(benzoxazolyl)pyridine with beta-cyclodextrin in neutral aqueous solution.
A selective and sensitive fluorescent chemosensor (BBOZP-CD) for Fe(3+) was composed of water-soluble beta-cyclodextrins and 2,6-bis(benzoxazolyl)pyridine which was synthesized through the reaction of 2,6-pyridinedicarboxylic acid and o-aminophenol catalyzed by polyphosphoric acid under microwave irradiation. The chemosensor BBOZP-CD for metal ions were carefully investigated by fluorescent quenching in present of metal ions. The result showed BBOZP-CD chemosensor was remarkable fluorescence quenching and a highly selectivity and sensitivity for Fe(3+) in neutral aqueous solution, and the other common metal ions did not notably disturb the detection of Fe(3+). Additionally, the effect of pH to the chemosensor for Fe(3+) was also studied. The result indicated the respond signals of BBOZP-CD to Fe(3+) was stable and hardly influenced while the pH value was greater than 3.6.
Feng
Liheng
L
School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China.
Chen
Zhaobin
Z
Wang
Duosheng
D
D001583:Benzoxazoles / Q000737:chemistry*; D005453:Fluorescence; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry*; D008670:Metals / Q000737:chemistry; D011725:Pyridines / Q000138:chemical synthesis / Q000737:chemistry*; D012996:Solutions; D013050:Spectrometry, Fluorescence; D047392:beta-Cyclodextrins / Q000737:chemistry*
C519062:2,6-bis(benzoxazolyl)pyridine; D001583:Benzoxazoles; D008670:Metals; D011725:Pyridines; D012996:Solutions; D047392:beta-Cyclodextrins; D007501:Iron; C031215:betadex; C023666:pyridine