Dimethyl yellow-based colorimetric chemosensors for "naked eye" detection of Cr3+ in aqueous media via test papers

被引：17
作者：
Wang, De-Hui [1 ]
Zhang, Yuan [2 ]
Sun, Ran [1 ]
Zhao, De-Zhi [1 ]
机构：
[1] Liaoning Shihua Univ, Coll Chem Chem Engn & Environm Engn, Fushun 113001, Peoples R China
[2] Liaoning Inst Food Control, Shenyang 110015, Peoples R China
来源：
RSC ADVANCES | 2016年 / 6卷 / 06期
关键词：
ON FLUORESCENT CHEMOSENSOR; LIVING CELLS; SELECTIVE DETECTION; GOLD NANOPARTICLES; MOLECULAR CLIPS; AMINO-ACIDS; PROBE; CR(III); SENSOR; SPECIATION;
D O I：
10.1039/c5ra22127g
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Three colorimetric chemosensors were designed and synthesized by incorporating dimethyl yellow dye and multidentate chelating moieties into the preorganized dipodal receptors. The novel sensors display high selectivity for Cr3+ over a wide range of tested metal ions in a rapid visual output manner. UV-vis titrations with Cr3+ revealed the appearance of a new intense absorption band centered at about 515-530 nm which was accompanied by a dramatic change in color from light yellow to magenta, with the association constant being about 2.0 to 3.0 x 10(5) M-1. Further binding model studies by mass spectroscopy, Job's plot, and linear fitting of the UV-vis titration curve demonstrated that the receptors formed 4 : 4, 1 : 2, and 4 : 4 binding modes with Cr3+, respectively. The easy-to-prepare test papers indicated the potential application for detecting Cr3+ in natural aqueous environments without any spectroscopic instrumentation.
引用
收藏
页码：4640 / 4646
页数：7
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