Synthesis, structure and fluorescent properties of 2-(1H-benzoimidazol-2-yl)quinolin-8-ol ligands and their zinc complexes

Emission and theoretical studies of Schiff-base [2+2] macrocycles derived from 2,2′-oxydianiline and zinc complexes thereof

“…Luminescence quantum yields were measured for both solid samples and solutions by absolute measurement. As shown in Table 4, complexes 1-3 were found to exhibit moderate fluorescence quantum yields [30] in solution. In the solid state, the quantum yields for complex 1-3 is 2.66%, 6.90% and 1.29%, respectively, together with the high PL lifetime makes complex 2 good candidates as luminescent materials.…”

Zinc 2-((2-(benzoimidazol-2-yl)quinolin-8-ylimino)methyl)phenolates: Synthesis, characterization and photoluminescence behavior

“…Zinc itself has been recognized as the second abundant metal in human body [7], and is involved in various biological processes including DNA synthesis, microtubule polymerization, gene expression, apoptosis, immune system function, as well enzyme activity [8][9][10][11]; meanwhile unbalances of the zinc ion can cause neurological disorders to result: amyotrophic lateral sclerosis and diseases such as Alzheimers, Parkinson, and epilepsy [12][13][14][15]. In chemical terms, the multi-dentate zinc complexes have been extensively explored for their fluorescent properties [21][22][23][24][25][26][27] by employing easily available Schiff-base ligands, moreover, the versatility of their structures are also attractive [28][29][30][31][32]. We have also investigated several series of multi-dentate zinc complexes [25-27, 33, 34], and observed good photoluminescence behavior for zinc complexes bearing 2-(1H-benzoimidazol-2-yl)-substituted quinolin-8-olates [26] or phenolates [27] and fluorescent properties for imidazol-2-yl derivatives and their zinc complexes [33,34].…”

“…In chemical terms, the multi-dentate zinc complexes have been extensively explored for their fluorescent properties [21][22][23][24][25][26][27] by employing easily available Schiff-base ligands, moreover, the versatility of their structures are also attractive [28][29][30][31][32]. We have also investigated several series of multi-dentate zinc complexes [25-27, 33, 34], and observed good photoluminescence behavior for zinc complexes bearing 2-(1H-benzoimidazol-2-yl)-substituted quinolin-8-olates [26] or phenolates [27] and fluorescent properties for imidazol-2-yl derivatives and their zinc complexes [33,34]. In further exploring the scope of using 2-((2-(1H-benzoimidazol-2-yl)quinolin-8-ylimino)methyl)phenol derivatives, which were initially developed as tetra-dentate ligands for aluminum complexes as pre-catalysts in polymerization applications [35], the zinc complexes have now been synthesized.…”