Detection of Copper(II) in Water by Methylene Blue Derivatives. Issue 21 (14th October 2020)

• Record Type: Journal Article
• Authors: Ciarrocchi, Carlo; Tumino, Adriana; Sacchi, Donatella; Orbelli Biroli, Alessio; Licchelli, Maurizio
• Is Part Of: Chemphyschem. Volume 21:Issue 21(2020)
• Page Start: 2432
• Page End: 2440
• Publication Date: 2020-10-14
• Subjects: copper detection -- colorimetric chemosensor -- cyclam -- macrocyclic complexes -- phenothiazinium/methylene blue; Chemistry, Physical and theoretical -- Periodicals; 541.05
• DOI: 10.1002/cphc.202000676
• Languages: English
• ISSNs: 1439-4235

Abstract

Abstract: 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. Abstract : Detecting Cu(II) colorimetrically : Copper(II) ions can be recognized in water by two new chemosensors based on cyclam receptor unit(s) and a phenothiazinium chromophore even at micromolar concentration levels for a naked‐eye qualitative and quantitative detection, nicely turning the solution colour from blue to pink.