A novel colorimetric and fluorescent sensor for fluoride detection based on a three-arm phenanthroline derivative

Abstract

A novel highly sensitive colorimetric receptor trisphen for F -ion based on three-arm phenthroline derevative trisphen had been successfully designed, synthesized, and characterized. Experiments showed that receptor trisphen could selectively recognize the F -and AcO -in DMSO and even in competitive hydrogen-bonding mixture solutions. The ability of recognition and the bond between trisphen and anions were determined using naked eye, UVvis, and fluorescence analyses. Benesi-Hildebrand equation indicated that receptor trisphen associated with F -and AcO -in a 1:2 stoichiometry. Moreover, 1 H NMR experiments were carried out to explore the insight of interaction between trishen and anions. To the best of our knowledge, this is the first example of anion sensor based on three-arm phenanthroline derivative.

Preparation of 2‐ethyl‐4‐methylimidazole derivatives as latent curing agents and their application in curing epoxy resin

“…The signal at about 13.6 corresponding to the N-H on imidazole 26 does not appear in the three spectra. The peak at 7.26 is attributed to the absorption of deuterated chloroform solvent.…”

Modulation in Photophysical Properties of Fluorescent Imidazole Possessing 1,10‐Phenanthroline on Introduction of Ru(bipy)22+ towards Cation Sensing

“…The distinct structural features of 1, 10‐phenanthroline skeleton such as planarity, rigidity, good conjugated π‐system and the two nitrogen atoms placed in juxtaposition (creating binding sites for metal cations), make it one of the supreme backbone moieties for the design and synthesis of chemosensors for metal ion sensing . Several reports in the literature document substituted imidazole‐[4, 5‐ f ]‐1,10‐phenanthroline derivatives as attractive chemosensors . The nitrogen atoms of phenanthroline and donor pyridine like nitrogen atom within the imidazole ring participate in cation binding …”

A recyclable, fluorescent, and colorimetric sensor for fluoride anion in water using a crosslinked polymer functionalized with hydroxyl quinolinium

“…F − is also used in hypnotics, anesthetics, psychiatric drugs, and cockroach poisons. Numerous monomeric-based colorimetric and/or fluorescent chemosensors for F − have focused on systems containing imidazole, 7−10 urea, 11,12 thiourea, 13 naphthalimide, 14−17 coumarin, 18 spiropyran, 19 triarylborane, 20 phenanthroline, 21 quinoline, 22,23 arylaldoxime, 24 Rhodamine-Furan, 25 Si-O, 26 indole, 27 metal-organic frameworks, 28 diketopyrrolopyrrole, 29 or calix [4]pyrrole 30,31 moieties. Therefore, determination of F − is significant.…”

“…Numerous monomeric-based colorimetric and/or uorescent chemosensors for F À have focused on systems containing imidazole, [7][8][9][10] urea, 11,12 thiourea, 13 naphthalimide, 14-17 coumarin, 18 spiropyran, 19 triarylborane, 20 phenanthroline, 21 quinoline, 22,23 arylaldoxime, 24 Rhodamine-Furan, 25 Si-O, 26 indole, 27 metal-organic frameworks, 28 diketopyrrolopyrrole, 29 or calix [4]pyrrole 30,31 moieties. In recent years, polymeric colorimetric and/or uorescent sensors for F À have attracted signicant research interest because of advantages such as presence of multiple recognition sites, possibility of signal application, and ease of incorporation into devices.…”