title: New 1,2,4-triazole-based azo-azomethine dyes. Part I: synthesis, characterization and spectroscopic studies.
abstract: Four new 1,2,4-triazole-based azo-azomethine dyes were synthesized via condensation of 3,5-diamino-1,2,4-triazole with azo-coupled o-vanillin precursors. The prepared dyes were characterized by IR, UV-vis and (1)H NMR spectroscopic methods as well as elemental analyses. Thermal properties of the prepared dyes were examined by thermogravimetric analysis. Results indicated that the framework of the dyes was stable up to 225 °C. Also, the influence of various factors including time and mixed DMSO/EtOH solution on UV-vis spectra of the dyes were investigated.
authors.affiliation: Faculty of Science, Department of Chemistry, Arak University, Arak 38156-8-8349, Iran. h-khanmohammadi@araku.ac.ir
authors.forename: Hamid
authors.initials: H
authors.lastname: Khanmohammadi
authors.forename: Malihe
authors.initials: M
authors.lastname: Erfantalab
mesh_terms: D000042:Absorption; D001391:Azo Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D004396:Coloring Agents / Q000138:chemical synthesis* / Q000737:chemistry*; D004055:Differential Thermal Analysis; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D004583:Electrons; D000431:Ethanol / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D012996:Solutions; D013055:Spectrophotometry, Infrared; D013818:Thermogravimetry; D013882:Thiosemicarbazones / Q000138:chemical synthesis* / Q000737:chemistry*; D013997:Time Factors; D014230:Triazoles / Q000138:chemical synthesis* / Q000737:chemistry*
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D012996:Solutions; D013882:Thiosemicarbazones; D014230:Triazoles; C512188:azomethine; C045575:1,2,4-triazole; D000431:Ethanol; D004121:Dimethyl Sulfoxide