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Synthesis characterization quantum chemical calculations andevaluation of antioxidant properties of 1, 3, 4 - thiadiazole derivativesincluding 2 - and 3 - methoxy cinnamic acids    
Yazarlar
Prof. Dr. Mahmut GÜR Prof. Dr. Mahmut GÜR
Kastamonu Üniversitesi, Türkiye
Doç. Dr. Halit MUĞLU Doç. Dr. Halit MUĞLU
Kastamonu Üniversitesi, Türkiye
Doç. Dr. Muhammet Serdar ÇAVUŞ Doç. Dr. Muhammet Serdar ÇAVUŞ
Kastamonu Üniversitesi, Türkiye
Aytaç Güder
Giresun Üniversitesi, Türkiye
Hakan S Sayıner
Prof. Dr. Fatma KANDEMİRLİ Prof. Dr. Fatma KANDEMİRLİ
Kastamonu Üniversitesi, Türkiye
Özet
A series of 1,3,4-thiadiazole derivatives including 2- and 3-methoxy cinnamic acids were synthesized, and their structures were elucidated by the UV, IR, 1H NMR, 13C NMR spectroscopies and elemental analysis. The UV and IR calculations of the molecules were performed by using B3LYP, HF and MP2 methods with selected 6-311++G(2d,2p), 6-311++G(3df,3pd) and cc-pvtz basis sets. Dipole moment, polarizability, chemical hardness/softness and electronegativity were also calculated and analyzed. Experimental FT-IR spectra and UV–Vis spectrum of the compounds were compared with theoretical data. Furthermore, antioxidant activities of the compounds were practised via different test methods such as 2,2-diphenyl-1-picryl-hydrazyl (DPPH[rad]), N,N-dimethyl-p-phenylenediamine (DMPD[rad]+), and 2,2′-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS[rad]+) scavenging activity assays. When compared with standards (BHA-Butylated hydroxyanisole, RUT-Rutin, and TRO-Trolox), it was observed that especially XIII and XIV which include methoxy groups at the o- and m-positions, respectively, had effective activities.
Anahtar Kelimeler
1,3,4-Thiadiazole | Antioxidant properties | Computational chemistry | Density functional theory | Methoxy-cinnamic acid | Radical scavenging activities
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı Journal of Molecular Structure
Dergi ISSN 0022-2860
Dergi Tarandığı Indeksler SCI
Makale Dili İngilizce
Basım Tarihi 04-2017
Cilt No 1134
Sayı 1134
Sayfalar 40 / 50
Doi Numarası 10.1016/j.molstruc.2016.12.041
Makale Linki https://www.sciencedirect.com/science/article/pii/S0022286016313552