A new cycloruthenated complex: Synthesis, characterization and colorimetric detection of bisulphite in water

Syntheses and properties of cyclometalated ruthenium(II) complexes with 1,10-phenanthroline and phenylphthalazine ligands

“…Cyclometalated ruthenium(II) complexes, [Ru(bpy) 2 (C^N)] + (C^N = cyclometalated bidentate ligand), bearing 2,2′-bipyridine analogous (N,C) bidentate ligands such as 2-phenylpyridine (Phpy) and its derivatives, 4-(2-pyridyl)benzaldehyde (Hpba), 2-phenylquinoline (PhQn) and so on therefore have been extensively studied. These cycloruthenated polypyridyl complexes have been used as active components in a variety of applications including supramolecular assembly, (photoinduced) electron-transfer reactions and photochemistry [7][8][9]. One the other hand, versatile phenylphthalazine-type ligands have only been employed in the synthesis of cyclometalated Ir(III) complexes, which exhibited unique phosphorescence properties [10][11][12]; with polymeric light-emitting devices doped with complex, tris(1-(2,6-dimethylphenoxy)-4-(4-chlorophenyl) phthalazine)-iridium(III), nearly 100% internal phosphorescence efficiency has been achieved [13].…”

Hydrophilic Indolium Cycloruthenated Complex System for Visual Detection of Bisulfite with a Large Red Shift in Absorption

“…However, a decrease in the absorption intensity at 455 nm was observed in the pH range from 3.53 to 1.82, which can be attributed to the effect of the carbanionic ligand. 52,59 Nevertheless, the absorption intensity at 455 nm was also gradually reduced by increasing the pH values from 8.52 to 11.95. These obvious changes could be assigned to the possible OH − addition on the benzo[e]indolium moiety with an ethylene group under strong basic conditions.…”

“…Materials. [Ru(pba)(bpy) 2 ] + [2; Hpba = 4-(2-pyridyl)benzaldehyde] 52 and 2,3,3-trimethyl-1-ethylbenz[e]indolium iodide 53 were prepared by the methods described in the literature and confirmed by 1 H NMR spectroscopy. All solvents and reagents were commercially available and were used without further purification unless specified.…”

“…45−48 Cyclometalated ruthenium complexes, as a type of ruthenium oligopyridine complex, have drawn much attention in chemosensor fields for their remarkable photophysical properties with the absorption shifted to the longwavelength region by replacing a nitrogen atom in bipyridine or terpyridine with an anionic carbon center. 49−51 In our recent work, we designed and synthesized a water-soluble colorimetric probe for bisulfite based on cycloruthenated complex by using the the nucleophilic addition of aldehyde, 52 which exhibited a remarkable color change from deep red to light yellow. Nevertheless, the detection process was time-consuming (about 2 h).…”

First cycloruthenation of 2-alkenylpyridines: synthesis, characterization and properties

“…S1–S4 † ). Then, trimethylamine 24 was used as a deprotonating agent to get their corresponding cyclometalated ruthenium complexes without purifying intermediates. And the yields were still satisfied in the range from 25 to 45%.…”