Fabricating of Turquoise/White Luminescent Azo-Schiff Bases Bearing Benzimidazole and Imidazole Rings

Yıl 2025, Erken Görünüm, 1 - 1

Özlem Güngör

https://doi.org/10.35378/gujs.1422427

Öz

New azo dyes (1a-b) were produced by the azo coupling of 2-nitro-1,4-phenylenediamine with 5-chlorosalicylaldehyde and 5-chloro-2-hydroxyaniline. Corresponding Schiff base derivatives (2a-b) bearing conjugated benzimidazole and imidazole moieties were obtained via the condensation reaction of these dyes with 2-aminobenzimidazole and 4-imidazolecarboxaldehyde. Their structures were identified by IR, 1H/13C NMR, mass and UV–Vis spectroscopies and microanalysis. Chromic (solvato-, acido-, thermo-) and photoluminescence behaviour of compounds 2a and 2b were evaluated depending on their donor–π–acceptor molecular system and intramolecular proton tautomerism. Electronic absorption and photoluminescence spectra of 2a and 2b were recorded in DMSO, DMF and CHCl3. 2a emitted turquoise luminescence in DMSO and DMF, and white luminescence in CHCl3, while 2b emitted strong turquoise luminescence in only CHCl3.

Anahtar Kelimeler

Azo-Schiff bases, Benzimidazole, Imidazole, Turquoise luminescence, White luminescence

Destekleyen Kurum

Research Foundation of Gazi University

Proje Numarası

F.E.F. 05/2019–23

Teşekkür

I am thankful to Research Foundation of Gazi University (Project ID: F.E.F. 05/2019–23). I am also grateful to Photonics Application and Research Center of Gazi University for photoluminescence measurements.

Kaynakça

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