A smart optical probe for detection and discrimination of Zn2+, Cd2+ and Hg2+ at nano-molar level in real samples

被引：16
作者：
Banerjee, Mahuya [1 ]
Ghosh, Milan [1 ]
Ta, Sabysachi [1 ]
Das, Jayanta [1 ]
Das, Debasis [1 ]
机构：
[1] Univ Burdwan, Dept Chem, Burdwan 713104, W Bengal, India
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2019年 / 377卷
关键词：
Discrimination of Zn2+; Cd2+ and He2+; Emission; Bare eye; Nano-molar; Logic gate; Sea fish; ON FLUORESCENT SENSOR; CHELATION-ENHANCED FLUORESCENCE; RHODAMINE-BASED FLUORESCENT; CHEF-FRET PROCESSES; BINARY LOGIC GATE; SELECTIVE DETECTION; RATIOMETRIC DETECTION; MOLECULAR-MECHANISM; LIVING CELLS; ZINC;
D O I：
10.1016/j.jphotochem.2019.04.002
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A multi-signaling optical probe (L) having rhodamine B spacer has been developed for rapid detection and discrimination of Zn2+, Cd2+ and Hg2+ at nano-molar level. L recognizes them through bare eye, absorption and emission spectroscopy. The probe detects as low as 1.2 x 10(-9) M Zn2+, 9.6 x 10(-9) M Cd2+ and 1.5 x 10(-10) M Hg2+ with corresponding binding constants, 2.1 x 10(4) M-1, 6.5 x 10(5) M-1 and 3.4 x 10(6) M-1 respectively. The recognition mechanism involves PET-CHEF-FRET processes. TD-DFT studies reveal minimum energy optimized geometries of L and its' adduct with the said cations. Theoretical calculations also support experimental spectral properties. Interference free new method allows determination of said cations in sea fish and water samples.
引用
收藏
页码：286 / 297
页数：12
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