Synthesis of some new solvatochromic 1(4)-substituted Pyrazol-5-one Azo derivatives

Synthesis, spectral characterisation and antimicrobial activity of new disazo dyes derived from heterocyclic coupling components

“…There are monoazo dyes derived from heterocycles, such as pyridone, pyrazolone, indoles, quinoline and thiophene derivatives. The use of heterocyclic coupling components and diazo components in the synthesis of azo disperse dyes is well established, and the dyes exhibit good tinctorial strength and brighter dyeing than those derived from aniline-based components [14][15][16][17][18][19][20][21][22][23][24][25]. Although, many researchers have described the synthesis and dyeing properties of monoazo dyes, only a few disazo dyes have been synthesised and their properties investigated in recent years [26][27][28][29][30][31][32][33][34][35][36][37].…”

Synthesis, Characterization, Absorption and Fastness Properties of Novel Monoazo Dyes Derived from 1-Phenyl-3-amino-4-(2-thiazolilazo)pyrazol-5-one

“…[1][2][3][4][5] Hetarylazo dyes based on heterocyclic diazo and coupling components have been attracted the attention of scientists in recent years. [6][7][8][9][10][11][12] Among these, the hetarylazopyrazolone dyes have high fluorescence, high quantum yield, superior photostability in the visible region, excellent fastness properties, [13][14][15][16] tautomeric structures 6,7,10,17 in addition to their bathochromic effects in the absorption spectra. 6,7,10,17 The absorption and emission properties of the pyrazolones can be tuned according to the properties of the solvent, especially where electron-withdrawing and electron-donating substituents are attached at the 1, 3 and 4-positions of pyrazolone ring.…”

Hetarylazopyrazolone Dyes Based on Benzothiazole and Benzimidazole Ring Systems: Synthesis, Spectroscopic Investigation, and Computational Study

“…Their higher tinctorial strength and brighter dyeing make azo dyes based on heterocyclic amines superior than aniline based azo dyes [23][24][25][26][27][28]. Some hetarylazopyrazolone dyes have not only potential use as dye stuff, but also other potential nontextile applications such as optical materials [29].…”