A New Benzothiazin-functionalized Calix[4]arene-based Fluorescent Chemosensor for the Selective Detection of Co2+ Ion

Fluorescent cyclophanes and their applications

“…The possibilities with calix[4]arenes are endless on account of their tunability with suitable ligating sites to accomplish the detection of metal cations, 71 anions, 72 explosives, 73 and biomolecules 74 amongst others, in a selective manner on occasions. They were also found to have potential in biomedical applications.…”

Disposable paper-based PET fluorescence probe linked with calix[4]arene for lithium and phosphate ion detection

“…In fluorescence methodology, fluorescent molecules due to their emissive behavior, easy signal detection, sensitivity, selectivity, and low-cost, offer many advantages over other systems in this area of research. [31][32][33][34][35][36][37][38][39] To date, our team has been working on different types of calix [4]arene-based fluorescence sensors using various fluorophores to detect several molecular ions. [40][41][42][43][44][45] This paper deals with the development of calix [4]arene-based fluorescence sensor (p-C4A).…”

“…In fluorescence methodology, fluorescent molecules due to their emissive behavior, easy signal detection, sensitivity, selectivity, and low-cost, offer many advantages over other systems in this area of research. 31–39…”

A portable fiber optic sensor for the luminescent sensing of cobalt ions using carbon dots

“…18 Although reports of luminescent sensors for cobalt are relatively limited, several different material classes have been evaluated for cobalt detection, including metal-organic frameworks, 19–22 metal nanoparticles, 23–27 quantum dots, 28–30 organic molecules, 31–37 silicon nanomaterials, 38 polymers, 39 metal complexes, 40 and graphene/carbon quantum dots. 41–53 However, many of the sensors are not suitable for deployment in low pH environments 19,26,36,40,44,49,54–57 or aqueous systems, 22,32,40 suffer from cross-sensitivity in the sensing response when other metal ions are present, 28,39,41,43,53 and/or require a long or tedious synthetic approach. 21,35,37 Moreover, these luminescent sensors for cobalt have not been evaluated on low-cost, portable platforms that would be required for real-time process monitoring or cobalt prospecting, and often aren’t tested in conditions relevant for coal utilizaiton byproduct streams ( e.g.…”

“…Moreover, luminescent sensing platforms can be designed for portability, enabling field deployment, which reduces characterization time and cost. 18 Although reports of luminescent sensors for cobalt are relatively limited, several different material classes have been evaluated for cobalt detection, including metal-organic frameworks, [19][20][21][22] metal nanoparticles, [23][24][25][26][27] quantum dots, [28][29][30] organic molecules, [31][32][33][34][35][36][37] silicon nanomaterials, 38 polymers, 39 metal complexes, 40 and graphene/ carbon quantum dots. [41][42][43][44][45][46][47][48][49][50][51][52][53] However, many of the sensors are not suitable for deployment in low pH environments 19,26,36,40,44,49,[54][55][56][57] or aqueous systems,…”