Premium
A colorimetric probe for detection of Cu 2+ by the naked eye and application in test paper
Author(s) -
Cao Xiaorui,
Gao Qi,
He Xiaotao,
Bai Yinjuan,
Sun Wei
Publication year - 2020
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.3769
Subject(s) - absorbance , naked eye , chemistry , rhodamine , fourier transform infrared spectroscopy , colorimetry , ion , analytical chemistry (journal) , selectivity , spectroscopy , detection limit , optics , chromatography , fluorescence , physics , organic chemistry , quantum mechanics , catalysis
A novel colorimetric probe RP1 was synthesized using rhodamine derivatives and heterocyclic compounds for the purpose of detecting Cu 2+ . RP1 showed good selectivity, high sensitivity and affinity toward Cu 2+ over other competing ions in CH 3 OH–H 2 O (1/1, v /v) solution. Absorbance intensity showed a good linear fit between probe R1 and Cu 2+ over the concentration range 1–8 μM and the association constant was also calculated to be 1.145 × 10 5 M −1 . The sensing mechanism was deduced using Job's plot, Fourier transform infrared spectroscopy, and density functional theory studies. In addition, the colorimetric experiment indicated that probe RP1 could be made into test paper to detect Cu 2+ with a colour change from colourless to pink.