Design of a novel coumarin-based multifunctional fluorescent probe for Zn²⁺/Cu²⁺/S²⁻ in aqueous solution.
A multifunctional fluorescent chemosensor 7-(diethylamino)-coumarin-3-carbaldehyde-(2'-methylquinoline-4'-formyl) hydrazone (HL) has been designed and synthesized. The sensor shows significant fluorescence enhancement in the presence of Zn(2+), which might be mainly due to the restricted -CN isomerization process. In contrast, the fluorescence of the sensor is quenched by Cu(2+) attributed to the inherent paramagnetic species. More interestingly, the 'in situ' prepared L-Cu exhibits a selective response to S(2-) based on reversible formation-separation of complex L-Cu and CuS.
College of Chemistry and Chemical Engineering, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, PR China.
Jing-Can
JC
Qin
College of Chemistry and Chemical Engineering, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, PR China. Electronic address: yangzy@lzu.edu.cn.
Zheng-Yin
ZY
Yang
D003300:Copper / Q000032:analysis*; D003374:Coumarins / Q000032:analysis / Q000737:chemistry*; D004784:Environmental Monitoring / Q000379:methods; D005456:Fluorescent Dyes / Q000138:chemical synthesis; D015336:Molecular Probe Techniques; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013050:Spectrometry, Fluorescence / Q000379:methods*; D013455:Sulfur / Q000032:analysis*; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis; D015032:Zinc / Q000032:analysis*
D003374:Coumarins; D005456:Fluorescent Dyes; D014874:Water Pollutants, Chemical; D014867:Water; D013455:Sulfur; D003300:Copper; C030123:coumarin; D015032:Zinc
Copper; Fluorescent sensor; Multifunctional; Sulfide; Zinc