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Detection of Copper(II) in Water by Methylene Blue Derivatives
Author(s) -
Ciarrocchi Carlo,
Tumino Adriana,
Sacchi Donatella,
Orbelli Biroli Alessio,
Licchelli Maurizio
Publication year - 2020
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.202000676
Subject(s) - cyclam , chemistry , copper , molar absorptivity , methylene blue , chromophore , aqueous solution , metal , naked eye , inorganic chemistry , photochemistry , nuclear chemistry , detection limit , organic chemistry , chromatography , physics , optics , photocatalysis , catalysis
Two novel phenothiazin‐5‐ium derivatives bearing cyclam moieties ( 3 a + and 3 b + ) were synthesized and investigated as Cu 2+ sensors. Both ligands show intense spectral changes in the presence of Cu 2+ in aqueous solutions. The high molar extinction coefficient of the chromophore allows both naked eye detection and spectrophotometric quantitative determination of the cation at a micromolar‐concentration scale. 3 a + was found to outperform 3 b + , showing negligible spectral changes in the presence of excesses of other metal cations.