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Öğe Synthesis and anticorrosion studies of 4-[(2-nitroacetophenonylidene)-amino]-antipyrine on SAE 1012 carbon steel in 15 wt.% HCl solution(Taylor & Francis, 2020-11-16) Gerengi, Hüsnü; Çakmak, Reşit; Dağ, Beşir; Solomon, M. M; Tüysüz Akbal, Hatice Aslıhan; Kaya, ErtuğrulA novel corrosion inhibitor, ((E)-1,5-dimethyl-4-((1-(3-nitrophenyl)ethylidene)amino)-2-phenyl-1,2-dihydro-3H-pyrazol-3-one) (DNPP) was synthesized in high yield by the condensation reaction of 4-aminoantipyrine with 2-nitroacetphenone derived from acetophenone as a starting material and characterized by FT-IR, 1H, and 13C NMR techniques. DNPP was tested against the corrosion of SAE 1012 carbon steel in 15 wt.% HCl solution using electrochemical and surface characterization techniques. Results obtained show that DNPP is effective in retarding the corrosion of SAE 1012 carbon steel. With 4 mM of DNPP, the charge transfer resistance of SAE 1012 in 15 wt.% HCl solution is raised from 17.42 to 140.50 Ω cm2 and the substrate surface is protected by 87%. The inhibition is through adsorption mechanism (mixed-adsorption type) and has been confirmed by SEM and EDAX results. Potentiodynamic polarization results reveal that DNPP acted as a mixed-type corrosion inhibitor. DNPP is a promising candidate for the formulation of an inhibitor cocktail for the strong acid environment.Öğe Synthesis characterization and using some of schiff base ligands derived from 4 aminoantipyrine as an inhibitor(Selçuk Üniversitesi, 2017) Dağ, Beşir; Yaşar, Fevzi; Kızılkaya, HakanSchiff bases and their complexes are widely studied because of the increasing recognition of their role in biological systems. In azo methine derivatives, the C=N linkage is essential for biological activity; several azomethines were reported to possess remarkable antibacterial and antifungal, anticancer. With the increasing incidence of deep mycosis, there has been increasing emphasis on the screening of new and more effective antimicrobial drugs with low toxicity. These compounds were recently found to have significant antitumor and biological activity. Antipyrine derivatives are reported to exhibit analgesic and antiinflammatory effects, antiviral, antibacterial, and herbicidal activities, and have also been used as hair color additives and to potentiate the local anesthetic effect of Lidocaine. Transition metal complexes with ligands derived from 4-aminoantipyrine have significant biological activity. This prompted us to synthesize a new series of heterocyclic Schiff bases containing the antipyrinyl moiety. The present study reports synthesis and charaterization of Schiff bases derived from 1-phenyl-2,3-dimethyl-4-(N-2 hydroxybenzylidene)-3- pyrazolin-5-one and 1-phenyl-2,3-dimethyl-4-(N-2-hydroxynaphthylidene)-3-pyrazolin-5- one with 5-aminoisophtlalic acid [1-2]. These compounds were synthesized in high yield and characterized by SEM, FT–IR, 1H NMR and 13C NMR.
