title: Thermally stable water insoluble azo-azomethine dyes: synthesis, characterization and solvatochromic properties.
abstract: Six new water insoluble azo-azomethine dyes have been synthesized via condensation reaction of α,α'-bis(o-aminophenylthio)-1,2-xylene with substituted azo-coupled salicylaldehyde. The condensation reaction provides the expected bis-iminated azo-azomethine dyes in good yields, ranging from 59% to 90%. The dyes have been characterized by IR, UV-Vis and (1)H NMR spectroscopic methods as well as elemental analysis. The thermal behavior of the prepared dyes has been determined using thermogravimetry technique. Furthermore, the effect of various organic solvents with different polarities on the UV-Vis spectra of the dyes has been also studied.
authors.affiliation: Department of Chemistry, Faculty of Science, Arak University, Arak 38156-8-8349, Iran. h-khanmohammadi@araku.ac.ir
authors.forename: Hamid
authors.initials: H
authors.lastname: Khanmohammadi
authors.forename: Khatereh
authors.initials: K
authors.lastname: Rezaeian
mesh_terms: D000042:Absorption; D001391:Azo Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D004396:Coloring Agents / Q000138:chemical synthesis* / Q000737:chemistry*; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D004583:Electrons; D009682:Magnetic Resonance Spectroscopy; D008956:Models, Chemical; D012995:Solubility; D012997:Solvents / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013237:Stereoisomerism; D013696:Temperature; D013818:Thermogravimetry; D013882:Thiosemicarbazones / Q000138:chemical synthesis* / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D012997:Solvents; D013882:Thiosemicarbazones; C512188:azomethine; D014867:Water; D004121:Dimethyl Sulfoxide