2028-76-4Relevant articles and documents
Experimental and theoretical studies of azo derivatives in terms of different donors, acceptors and position isomerism: Synthesis, characterization and a combined electronic absorption, electrochemical and DFT study
Haridas, Karickal R.,Janardanan, Deepa,Mohan A, Keerthi,Purushothaman, Aiswarya
, (2021/10/12)
Eight azo derivatives with two donor groups- diphenylamine and N,N-dimethylphenyl, and four acceptor groups - 3-nitrophenyl, 4-nitrophenyl, 4-phenylcarboxylic acid, and 3-phenylcarboxylic acid, were synthesized and characterized using 1H-NMR an
A comprehensive spectroscopic, solvatochromic and photochemical analysis of 5-hydroxyquinoline and 8-hydroxyquinoline mono-azo dyes
Coelho, Paulo J.,Lup, Andrew Ng Kay,Mahon, Peter J.,Pesyan, Nader Noroozi,Ramezanitaghartapeh, Mohammad,Raposo, M. Manuela M.,Rashidnejad, Hamid,Soltani, Alireza
, (2020/10/06)
A series of novel substituted-azo dyes 8-(aryldiazenyl)quinolin-5-ol (5a-i) were synthesized by the coupling reaction of 5-hydroxyquinoline with diazotized aniline derivatives in the presence of NaNO2 in HCl/H2O mixture. The study of
3-Aminopyrazolo[4,3-c]pyridine-4,6-dione as a precursor for novel pyrazolo[4,5,1-ij][1,6]naphthyridines and pyrido[4’,3’:3,4]pyrazolo[1,5-a]pyrimidines
Metwally, Nadia H.,Deeb, Emad A.
supporting information, p. 1614 - 1628 (2018/06/14)
The versatile, 3-aminopyrazolo[4,3-c]pyridine-4,6-dione (2) was synthesized and allowed to react with aldehydes, aryldiazonium chlorides, chalcones and enaminones to afford regioselectively the novel pyrazolo[4,3-c]pyridine derivatives 4a-c, pyrazolo[4,5,
Influence of intramolecular charge transfer and nuclear quantum effects on intramolecular hydrogen bonds in azopyrimidines
Bartova, Katerina,?echova, Lucie,Prochazkova, Elis?a,Socha, Ondrěj,Janeba, Zlatko,Drac nsky, Martin
supporting information, p. 10350 - 10359 (2018/04/14)
Intramolecular hydrogen bonds (IMHBs) in 5-azopyrimidines are investigated by NMR spectroscopy and DFT computations that involve nuclear quantum effects. A series of substituted 5-phenylazopyrimidines with one or two hydrogen bond donors able to form IMHB
Synthesis and properties of new N, N′ - phenyltetrazole podand
Pazik, Agnieszka,Kamińska, Beata,Skwierawska, Anna,Nakonieczna, Sandra,Ossowski, Tadeusz
, p. 253 - 264 (2015/12/31)
The synthesis of a new chromogenic N,N′-phenyltetrazole receptor is reported here. The cationbinding properties of this receptor in solution were investigated by naked-eye colour change, electrochemical methods and UV-Vis spectroscopy in various solvents
Synthesis and characterization of novel yellow azo dyes from 2-morpholin-4-yl-1,3-thiazol-4(5H)-one and study of their azo-hydrazone tautomerism
Umape, Prashant G.,Patil, Vikas S.,Padalkar, Vikas S.,Phatangare, Kiran R.,Gupta, Vinod D.,Thate, Abhinav B.,Sekar, Nagaiyan
, p. 291 - 298 (2013/10/21)
Novel yellow azo dyes were synthesized by diazotization of aromatic amines followed by coupling with 2-morpholin-4-yl-1,3-thiazol-4(5H)-one and fully characterized. The geometries of the synthesized dyes for azo and hydrazone tautomeric forms were optimized using B3LYP, CAM-B3LYP and M06 functional and 6-31G(d) and 6-311++G (d,p) basis sets, also their electronic excitation properties were evaluated using density functional theory. The optimized geometries reveal that the hydrazone for is more stable than the azo form. Photophysical properties of the synthesized dyes were evaluated by UV-Visible spectroscopy and compared with computed vertical excitation obtained from TDDFT. The results clearly illustrate existence of dye 8a, 8b and 8c in hydrazone tautomeric form, while 8d exist in both azo as well as hydrazone form. Thermal stabilities were estimated by using thermo gravimetric analysis, and results revels that the synthesized dyes have good thermal stability.
Synthesis, characterization and antimicrobial studies of some novel 3- arylazo-7-hydroxy-4-methylcoumarins
Sharma, Pratibha,Pritmani, Shreeya
, p. 1139 - 1142 (2007/10/03)
A series of 3-arylazo-7-hydroxy-4-methylcoumarins have been synthesized in excellent yields (80-90%) and their structures established on the basis of IR, 1H NMR, mass spectral data and elemental analyses. Their purity has been ascertained by ch
USE OF CURRENTLESS POTENTIAL-TIME CURVES FOR DETERMINING THE RATE CONSTANTS OF DIAZOTATION REACTIONS
Dlask, Vladimir
, p. 2315 - 2319 (2007/10/02)
The kinetics and the rate constants for the diazotation of nine aromatic amines at various conditions (temperature, medium) were determined by the method of currentless potential-time curves.A comparison with an independent method and with literature data is presented.
Polarography of Some Arylazothiohydantoin Derivatives
Darwish, S.,Fahmy, H. M.,Abdel Aziz, M. A.,El Maghraby, A. A.
, p. 344 - 349 (2007/10/02)
The polarographic behaviour of a series of arylazothiohydantoin derivatives has been investigated at a dropping mercury electrode.Two wawes were displayed.The first and predominant one is due to the reductive splitting of the azo-linkage by a 4e irreversi
1,2,3-Triazabutadienes. XIV. Investigations into the Acidic Cleavage of the Z-E-Isomeric 1-Aryl-3-- and 1-Aryl-3--triazenes
Fanghaenel, E.,Hohlfeld, J.
, p. 253 - 261 (2007/10/02)
The rate of the acid cleavage of the Z-E-isomeric 1-aryl-3-- and 1-aryl-3--triazenes 1 - 5 is investigated in dependence on the substituents in the aryl and benzo residue.The Z-isomer
