Ratiometric and highly selective fluorescent sensor for cadmium under physiological pH range: a new strategy to discriminate cadmium from zinc.
In a neutral aqueous environment, a new ratiometric Cd2+ fluorescent sensor 1a can successfully discriminate Cd2+ from Zn2+ by undergoing two different internal charge transfer (ICT) processes, and the high selectivity of sensor 1a to Cd2+ over some other metals was also observed. Moreover, through structure derivation and a series of NMR studies, the unique role of the 2-picolyl group (the part in red in the abstract graphic) in the sensor 1a-Cd2+ complexation was disclosed.
Lu
Chunliang
C
State Key Laboratory of Fine Chemicals, DUT - KTH Joint Education and Research Center on Molecular Devices, Dalian University of Technology, Dalian 116012, China.
Xu
Zhaochao
Z
Cui
Jingnan
J
Zhang
Rong
R
Qian
Xuhong
X
D002104:Cadmium / Q000032:analysis*; D002623:Chemistry Techniques, Analytical / Q000379:methods*; D002625:Chemistry, Organic / Q000379:methods; D005456:Fluorescent Dyes / Q000737:chemistry* / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D011725:Pyridines / Q000737:chemistry; D013050:Spectrometry, Fluorescence / Q000379:methods; D015032:Zinc / Q000032:analysis*
D005456:Fluorescent Dyes; D011725:Pyridines; D002104:Cadmium; D015032:Zinc