A novel 2,6-dicarbonylpyridine-based fluorescent chemosensor for Co2+ with high selectivity and sensitivity.
A novel fluorescence chemosensor based on 2,6-dicarbonylpyridine was designed and synthesized and its photophysical properties were characterized. Upon coordination of Co(2+) by the central 2,6-dicarbonylpyridinyl functional group, the chemosensor 2,6-bis(4-diphenylamino-styrylcarbonyl)pyridine (PhPy) showed nearly complete fluorescence quenching, while no fluorescence response was seen towards other competing cations. The experimental results show the chemosensor is highly selective and sensitive towards Co(2+) in the presence of competing ions, even in the ppb range. Job plot analysis was carried out and the results suggested that the binding of PhPy and Co(2+) was probably a 2 : 1 stoichiometry.
State Key Laboratory of Silicon Materials, Department of Materials Science & Engineering, Zhejiang University, Hangzhou, China.
Yiqun
Y
Tan
Jiancan
J
Yu
Yuanjing
Y
Cui
Yu
Y
Yang
Zhiyu
Z
Wang
Xiaopeng
X
Hao
Guodong
G
Qian
D002412:Cations / Q000737:chemistry; D003035:Cobalt / Q000032:analysis*; D004159:Diphenylamine / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry; D005456:Fluorescent Dyes / Q000737:chemistry*; D011725:Pyridines / Q000138:chemical synthesis / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
C570742:2,6-bis(4-diphenylaminostyrylcarbonyl)pyridine; D002412:Cations; D005456:Fluorescent Dyes; D011725:Pyridines; D003035:Cobalt; D004159:Diphenylamine; C023666:pyridine