A novel colorimetric and fluorescent sensor for fluoride and pyrophosphate based on fluorenone signaling units

A chromo-fluorogenic HMT sensor for Ag+ and the resultant HMT-Ag complex turn-off probe for F− in DMSO: experimental and theoretical studies

“…Evidently, the energy gap of HMT before and after binding was 5.91 eV and 1.53 eV respectively, significantly decreasing upon binding with Ag + ( Figure 6 a and b). The proposed and predicted interaction between HMT and Ag + is shown ( Figure 6 b), as suggested in literature, via crystal structure studies performed previously [ 21 , 22 ].…”

“…Evidently, the energy gap of HMT before and after binding was 5.91 eV and 1.53 eV respectively, significantly decreasing upon binding with Ag þ (Figure 6a and b). The proposed and predicted interaction between HMT and Ag þ is shown (Figure 6b), as suggested in literature, via crystal structure studies performed previously [21,22]. Contrastingly, the change in spectral data, from the absorption and fluorescence, these actions have been complemented by theoretical data, where the decrease in HOMO-LUMO gap is symbolic towards the formation of a more stable complex (HMT-Ag).…”

“…Alternatively, fluoride (F-) ion is very vital in human physiological system, occasionally applied in the dental care fields for osteoporosis treatment. However, once the concentration of F − is over the threshold, it becomes highly toxic to the physiological environment, eventually leading to osteosclerosis, fluorosis and other deadly neurodegenerative diseases [ 21 , 22 ]. Thus, easy-to-synthesize and cost-effective colorimetric probes for discriminating F − , still remains high in the priority list.…”

A Ruthenium Bipyridyl Molecular Dye Sensitizer and an Excited-State Intermolecular Proton Transfer-Active Colorimetric Probe for Anions, with High Affinity Towards CN− in DMSO

“…Thus, it is logically expected for N to exhibit anion-binding capability, where the acidities of the OH protons are drastically enhanced upon the photoexcitation, and therefore an excitedstate intermolecular proton transfer (ESIPT) channel might be opened [32][33][34]. Furthermore, a photoactive ruthenium bipyridyl moiety can not only enhance the affinity through electrostatic interactions, but also provide a PET and ESIPT chromogenic/fluorogenic signalling channel [35][36][37][38]. The molecular structure of 1 and N are shown accordingly (Scheme 1).…”

Copper‐Catalyzed C‐4 Carboxylation of 1‐Naphthylamide Derivatives with CBr4/MeOH

“…[2] Naphthalenes are privileged aromatic compounds that widely presents in numerous pharmaceuticals, agrochemicals and functional materials like organic semiconductor, or electroluminescent materials. [3] In this context, considerable efforts have been made for the synthesis of substituted naphthalene compounds via direct CÀ H functionalization. [4] Among them, regioselective functionalization of 1-nathylamine scaffolds using a bidentate chelation controlled strategy achieved significant progress in recent years.…”