title: New 1,2,4-triazole-based azo-azomethine dye. Part III: Synthesis, characterization, thermal property, spectrophotometric and computational studies.
abstract: A new 1,2,4-triazole-based azo-azomethine compound, H2L, has been prepared by condensation reaction of 1-(3-formyl-4-hydroxyphenylazo)-4-ethylbenzene with prepared triazole-based diamine. The structure of H2L was characterized by using FT-IR, UV-Vis and (1)H NMR spectroscopic methods as well as elemental analysis. Hard model chemometrics method has been used to determine the formation constants of zinc(II), copper(II), nickel(II) and cobalt(II) complexes of H2L in DMSO by UV-Vis spectrophotometric method. Solvatochromic behavior of the dye has been also investigated in some organic solvents with different polarities. Thermal properties of the prepared dye was examined by thermogravimetric analysis. Results indicated that the framework of the dye was stable up to 245 °C. Furthermore,(1)H chemical shifts and UV-Vis of H2L were studied by the gauge independent atomic orbital (GIAO), continuous set of gauge transformations (CSGT) and time-dependent density functional theory (TD-DFT) methods respectively at the level of density functional theory using B3LYP/6-311+G(d) basis sets in DMSO. The computational data are in reasonably good agreement with the experimental data.
authors.affiliation: Faculty of Science, Department of Chemistry, Arak University, Arak 38156-8-8349, Iran.
authors.forename: Malihe
authors.initials: M
authors.lastname: Erfantalab
authors.affiliation: Faculty of Science, Department of Chemistry, Arak University, Arak 38156-8-8349, Iran. Electronic address: h-khanmohammadi@araku.ac.ir.
authors.forename: Hamid
authors.initials: H
authors.lastname: Khanmohammadi
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; D055664:Electrochemical Techniques; D004583:Electrons; D006863:Hydrogen-Ion Concentration; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D012996:Solutions; D012997:Solvents; D013696:Temperature; D013818:Thermogravimetry; D013882:Thiosemicarbazones / Q000138:chemical synthesis* / Q000737:chemistry; D014230:Triazoles / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D008024:Ligands; D012996:Solutions; D012997:Solvents; D013882:Thiosemicarbazones; D014230:Triazoles; C512188:azomethine; C045575:1,2,4-triazole; D004121:Dimethyl Sulfoxide
keywords: 1,2,4-Triazole; Azo–azomethine; CSGT; GIAO; NBO; TD-DFT