title: A sensitive colorimetric and ratiometric chemosensor for trivalent metal cations.
abstract: A novel hydroxyethyl piperazine functionalized cyanine derivative was designed and synthesized. It presents selective colorimetric as well as ratiometric absorption responses to trivalent metal cations (Cr(3+), Fe(3+) and Al(3+)) over a variety of divalent and monovalent metal cations in 3:7 ethanol-water solution. Detection limits of this method for Cr(3+), Fe(3+) and Al(3+) were 3.99 μM, 4.30 μM and 1.85 μM, respectively. The recognition mechanism was attributed to the protonation of the organic probe, which blocked the photoinduced electron transfer (PET) process. In addition, the sensor was also successfully applied to the determination of Cr(3+) in prepared samples.
authors: School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, People's Republic of China.
authors: Xu
authors: X
authors: Zhao
authors: Guohui
authors: G
authors: Yin
authors: Di
authors: D
authors: Jin
authors: Xilong
authors: X
authors: Yan
authors: Yang
authors: Y
authors: Li
authors: Ligong
authors: L
authors: Chen
mesh_terms: D002232:Carbocyanines / Q000737:chemistry*; D002623:Chemistry Techniques, Analytical / Q000295:instrumentation*; D003124:Colorimetry; D004396:Coloring Agents / Q000737:chemistry*; D015195:Drug Design; D000431:Ethanol / Q000737:chemistry; D057230:Limit of Detection; D008670:Metals / Q000032:analysis* / Q000737:chemistry; D000077489:Piperazine; D010879:Piperazines / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D002232:Carbocyanines; D004396:Coloring Agents; D008670:Metals; D010879:Piperazines; D014867:Water; D000077489:Piperazine; D000431:Ethanol