süleyman demirel üniv. fen bilim. enst. derg. Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi 1308-6529 Süleyman Demirel Üniversitesi 10.19113/sdufenbed.1810211 Organic Chemical Synthesis Organik Kimyasal Sentez Synthesis of New Azo Dyes Containing Pyrazole and 1,3,4-Thiadiazole Derivatives and Investigation of Their Solvatochromic Properties Pirazol ve 1,3,4-Tiyadiazol Türevlerini İçeren Yeni Azo Boyalarının Sentezi ve Solvatokromik Özelliklerinin İncelenmesi https://orcid.org/0000-0001-5370-6048 Şener Nesrin KASTAMONU ÜNİVERSİTESİ https://orcid.org/0000-0001-7298-1491 Basim Shihab Shihab Ali KASTAMONU UNIVERSITY https://orcid.org/0000-0002-2928-3492 Zurnacı Merve KASTAMONU UNIVERSITY https://orcid.org/0000-0003-0540-7523 Şener İzzet KASTAMONU UNIVERSITY 04 24 2026 30 1 184 190 10 24 2025 03 09 2026 Copyright © 1995, Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi 1995 Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi

In this study, where 2-amino-1,3,4-thiadiazole and 5-mercapto-2-amino-1,3,4-thiadiazole compounds were used as starting materials, five new azo dyes were synthesized using 3-amino-5-methyl pyrazolone, 3-amino-1-phenyl-5-methyl pyrazolone, and barbutyric acid as coupling components. 1H-NMR and FT-IR spectroscopic methods determined the molecular structures of the synthesized compounds. In addition, UV-Vis and absorption spectra of the synthesized compounds were taken, and their solvatochromic properties were investigated. As a result of absorption studies, positive solvatochromism was observed in the synthesis compounds.

2-amino-1,3,4-tiyadiazol ve 5-merkapto-2-amino-1,3,4-tiyadiazol bileşiklerinin başlangıç maddesi olarak kullanıldığı bu çalışmada; 3-amino-5-metil pirazolon, 3-amino-1-fenil-5-metil pirazolon ve barbütirik asitin kenetleme bileşenleri olarak kullanıldığı beş yeni azo boyarmadde sentezlenmiştir. Sentezlenen bileşiklerin moleküler yapıları 1H-NMR, FT-IR spektroskopik yöntemleri ile belirlenmiştir. Ayrıca, sentezlenen bileşiklerin UV-Vis. absorpsiyon spektrumları alınmış ve solvatokromik özellikleri incelenmiştir. Absorpsiyon çalışmaları sonucunda, sentezlenen bileşiklerde pozitif solvatokromizm gözlenmiştir.

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