Multi-functional colorimetric chemosensor for naked eye recognition of Cu2+, Zn2+ and Co2+ using new hybrid azo-pyrazole/pyrrolinone ester hydrazone dye

A benzimidazole-derived fluorescent chemosensor for Cu(ii)-selective turn-off and Zn(ii)-selective ratiometric turn-on detection in aqueous solutions

“…Hence, it is of great significance to develop highly selective and sensitive fluorescent chemosensor to quantitatively detect Cu 2+ and Zn 2+ in biological and environmental fields. In this regard, fluorescent sensors for Cu 2+ and Zn 2+ detection have been designed based on various coordination scaffolds [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. For example, a naphthalene Schiff-base has been designed as a fluorescent sensor for Cu 2+ and Zn 2+ , where the fluorecence of sensor was quenched by Cu 2+ or enhanced by Zn 2+ over other metal cations in DMSO, respectively [11].…”

Idiosyncatic recognition of Zn2+ and CN− using pyrazolyl-hydroxy-coumarin scaffold and live cell imaging: depiction of luminescent Zn(ii)-metallocryptand

“…36 Pyrazolyl derivatives efficiently serve the purpose of colorimetric as well as fluorometric Zn 2+ sensors. 37,38 Thus, it is important to design analytical methods for the efficient, sensitive, selective, nontoxic, and cheap detection of Zn 2+ at the cellular level.…”

Spirooxazine-Based Dual-Sensing Probe for Colorimetric Detection of Cu2+ and Fe3+ and Its Application in Drinking Water and Rice Quality Monitoring

“…Several organic molecules, for example, rhodamine, anthracene, benzothiadiazole, squaraine, and phenothiazine, have been studied as potential chemosensors to detect a wide range of metal ions. − Moreover, their sensing mechanism in response to metal ions was also proposed based on the metal–ligand coordination and chemical reactions, such as bond cleavage, bond formation, rearrangement, and cyclization . To date, several chemosensors as colorimetric probes with high selectivity and sensitivity as a facile and rapid tool for on-site analysis of metal ions have been reported. − …”