4.6 Article

Azo dyes containing 1,3,4-thiadiazole fragment: synthesis and properties

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NEW JOURNAL OF CHEMISTRY
卷 46, 期 4, 页码 1929-1942

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ROYAL SOC CHEMISTRY
DOI: 10.1039/d1nj05084b

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  1. Ministry of Science and Higher Education of the Russian Federation [AAAA-A21-121011490017-5]

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New 1,3,4-thiadiazole derivatives with a diazenyl group and an imino group were synthesized and their optical and thermal properties were studied. The compounds were characterized by spectral and X-ray analyses.
New 1,3,4-thiadiazole derivatives containing a diazenyl group, as well as both a diazenyl and an imino group, were synthesized and their optical and thermal properties were investigated. Initially, new azo compounds containing an azo group directly in the thiadiazole block were obtained by the coupling of diazonium bisulfates based on the previously known 5-derivatives of 2-amino-1,3,4-thiadiazoles with N,N-dialkyl anilines (N(n-Bu)(2), NEt2, and NEt(EtOH)). Schiff bases were obtained by the interaction of p-toluidine, p-phenylenediamine and p-aminophenol with azo compounds containing an aldehyde group in the 1,3,4-thiadiazole ring. The new dyes were characterized by spectral (IR, UV, H-1 NMR, C-13 NMR and mass spectra) and X-ray analyses.

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