A new lipophilic cationic rhodamine-based chemosensor for detection of Al(III)/Cu(II) and intracellular pH change and its application as a smartphone-assisted sensor in water sample analysis

Phenothiazine appended thiophene derivative: a trilateral approach to copper ion detection in living cells and aqueous samples

“…Under standardized sensing procedures, we introduced Cu 2+ at various known concentrations into these samples. 42–44 The observable data provides strong evidence that the PTZ-SCN probe was more proficient at detecting Cu 2+ in the diverse water samples collected. The experiment was meticulously repeated thrice to affirm the results, which are comprehensively detailed in Table S2 †.…”

Structure–metal ion selectivity of rhodamine-based chemosensors

“…One recent example showed that compound 121 (Scheme 23) with a triphenylphosphonium moiety could detect Cu 2+ by producing a pink coloration and strong absorbance at 554 nm in CH 3 CN/HEPES buffer (7 : 3, v/v, pH 7) and Al 3+ by exhibiting a strong fluorescence at 582 nm in CH 3 CN by opening the spirolactam ring. 139 Detection limits were determined to be 1.6 × 10 −8 M for Al 3+ and 1.88 for × 10 −7 M Cu 2+ . As the media of experiments were different for Cu 2+ and Al 3+ , the coexistence of one cation could not interfere with the detection of the other metal ion.…”