27147-03-1Relevant articles and documents
Synthesis, conformational and theoretical studies of 1,n-di(2-formyl-4-phenylazophenoxy)alkanes
Balachander,Manimekalai
, p. 70 - 78 (2016)
1,n-di(2-Formyl-4-phenylazophenoxy)alkanes 1 and 2 and 1,3-di(2-formyl-4-phenylazophenoxymethyl)benzene 3 were synthesis and characterized by FT-IR, UV-Vis, 1H, 13C NMR and mass spectral studies. The stable conformations of 1-3 were predicted theoretically and selected geometrical parameters were derived from optimized structures. The molecular parameters of HOMO-LUMO energies, polarizability, hyperpolarizability, natural bond orbital (NBO), atom in molecule (AIM) analysis and molecular electrostatic potential (MEP) surfaces were determined by the density functional theory (DFT) method and analysed.
Novel chemosensor for multiple target anions: The detection of F- and CN- ion via different approach
Udhayakumari, Duraisamy,Velmathi, Sivan,Boobalan, Maria Susai
, p. 180 - 184 (2015)
A novel chemosensor based on azo linked Schiff base (receptor 1) was synthesized by simple condensation method. The sensor studies of receptor 1 disclose the selectivity toward fluoride and cyanide ion with a color change among the other common anions in
Synthesis and anion recognition studies of novel bis (4-hydroxycoumarin) methane azo dyes
Panitsiri, Amorn,Tongkhan, Sukanya,Radchatawedchakoon, Widchaya,Sakee, Uthai
, p. 14 - 18 (2016)
Four new bis (4-hydroxycoumarin) methane azo dyes were synthesized by the condensation of 4-hydroxycoumarin with four different azo salicylaldehydes and their structures were characterized by FT-IR, 1H NMR, 13C NMR, HRMS. Anion bindi
Synthesis and crystal structure of a highly selective colorimetric and fluorometric sensor for hydrogen sulfide
Ren, Kui,Shang, Xuefang,Chen, Yanmei,Zhang, Xueli,Fu, Jiajia,Zhao, Peipei,Zhang, Jinlian
, p. 765 - 771 (2017)
A novel Cu(II) complex chemosensor for hydrogen sulfide with azo as the colorimetric group has been synthesized. The complex and ligand crystals were obtained and the molecular structures were characterized by X-ray diffraction and Electrospray ionization High resolution mass spectrometer (ESI-HRMS). The photophysical and recognition properties were examined. The complex can recognize S2 ?, with an obvious color change from yellow to red based on a copper ion complex displacement mechanism. By contrast, no obvious changes were observed in the presence of other anions (AcO?, H2PO4 ?, F?, Cl?, Br? and I?). We present a simple, easily prepared, yet efficient, inorganic reaction-based sensor for the detection of S2 ?. The complex should have many chemical and analytical applications in the sensing of hydrogen sulfide.
Imidazole and azo-based schiff bases ligands as highly active antifungal and antioxidant components
Slassi, Siham,Fix-Tailler, Adeline,Larcher, Gérald,Amine, Amina,El-Ghayoury, Abdelkrim
, (2019)
We describe, herein, the synthesis, full characterization, and optical properties of four different ligands L1-L4 which associate an azo group, an imidazole unit, and a Schiff base fragment. The UV-visible absorption bands are characteristic of π → π and n → π transitions with an additional charge transfer between the azobenzene moiety and the imino group. Finally the determination of MIC80 values against pathogenic fungi such as S. apiospermum, A. fumigatus, and C. albicans revealed that these ligands have effective antifungal properties with highest activities (MIC80) on C. albicans for the azole based ligands L1-L3. DPPH radical scavenging of the studied ligands was also tested.
New 1,3-diazabicyclo-[3.1.0]hex-3-ene photochromic azo dyes: Synthesis, characterization and spectroscopic studies
Mahmoodi, Nosrat O.,Pasandideh Nadamani, Meysam,Behzadi, Tahereh
, p. 43 - 48 (2013)
Ten new 1,3-diazabicyclo-[3.1.0]hex-3-ene-based azo dyes (3a-3k) were synthesized via three-component reaction between [3-(x-phenyl)aziridin-2-yl] (phenyl)methanone (x = 4-NO2, 3-NO2), NH4OAc and azo-coupled o-vanillin or
Mononuclear complexes based on pyrimidine ring azo schiff-base ligand: Synthesis, characterization, antioxidant, antibacterial, and thermal investigations
Gulcan, Mehmet,Oezdemir, Sadin,Duendar, Abdurrahman,Ispir, Esin,Kurtoglu, Muekerrem
, p. 1754 - 1762 (2014)
Six transition metal(II) complexes with the heterocyclic ligand HL (1), [CuL2]·H2O (2), [NiL2]·3H 2O (3), [CoL2]·3H2O (4), [MnL 2]·3H2O (5), [ZnL2]·2H 2O (6), [PdLOAc]·H2O (7) [HL = 5-benzoyl-1-((E)-(2- hydroxy-5-((E)-phenyldiazenyl)benzylidene)amino)-4-phenylpyrimidin-2(1H)-one] were synthesized. The features of the azo Schiff bases were assigned from microanalytical, spectroscopic (IR, UV/Vis., 1H- and 13C NMR, API-ES mass), magnetic, and molar conductivity measurements at room temperature as well as thermal analysis. The electronic absorption spectroscopy and magnetic susceptibility measurements of the complexes indicate square pyramidal arrangement for PdII and octahedral environment for all the other complexes. The azo Schiff base HL acts as a monobasic tridentate ligand, which commonly coordinates through the oxygen atoms of the phenol OH and the pyrimidine one group, and the nitrogen atom of the azomethine group. The thermal behaviors of the ligand and its metal complexes were studied using thermogravimetric analysis (TGA) and differential thermal analysis (DTA). The metal complexes proved to be more thermally stable than the ligand; they decomposed at 10-30°C higher temperatures. Antioxidant properties of the ligand and its metal complexes (DPPH free radical scavenging, ferrous chelating and reducing power activities) were tested. Antimicrobial activities were studied with gram-positive bacteria, which included Bacillus subtilis and Staphylococcus aureus, whereas Escherichia coli and Pseudomonas aeruginosa represented gram negative bacteria. Copyright
An azo-phenol derivative probe: colorimetric and "turn-on" fluorescent detection of copper(II) ions and pH value in aqueous solution
Li, Yanchun,Han, Xiaojun,Song, Yan
, p. 20537 - 20541 (2017)
The optical properties of a novel, rhodamine-based derivative, synthesized by reacting rhodaminehydrazide and an azo-phenol derivative in ethanol, were investigated in ethanol-water solution. The novel sensor displayed selectivity for Cu2+ ions, as evidenced by a colourless to dark red colour change, which was characterized using UV visible spectroscopy and which also allowed visual detection of Cu2+. In contrast, selectivity towards pH was determined from changes in the absorption spectra in the micromolar range. This represents the first reported rhodamine-based sensor capable of detecting both Cu2+ and pH using two different modes. In addition, the rhodamine-based sensor has been successfully applied in the biomedical research field to the fluorescence imaging of Cu2+ in HeLa cells.
Room Temperature Reversible Z→E Photoisomerization of Azobenzene Appended to Anthraquinone-Benzimidazole Based Photoswitches with Resolved n→π* Absorption Band
Phapale, Daulat,Kushwaha, Archana,Das, Dipanwita
, p. 5768 - 5776 (2019)
Light-triggered substituted azobenzene-based molecular switches are well known for their potential applications as molecular machines. The Z-isomer stability affected by heteroaromatic groups, extended aromaticity, different substituents, and varying the solvents based on their polarity. In this regards, five different anthraquinone/imidazole-based azobenzene derivatives have been synthesized with different electronic push/pull substituents. The detailed study of photoswitching processes with kinetic data was appraised by using UV/Vis and 1H-NMR spectroscopic techniques. The investigation of light-induced hydroxyl group conversion to quinone-hydrazone tautomerization has been observed during the isomerization. Most importantly, intermolecular hydrogen bonding interaction between tautomeric form and a higher polar solvent (DMSO) block the isomerization, but in a less polar solvent (DCM), light-induced trans ? cis isomerization takes place by tautomerization pathway with well-separated π→π* and n→π* transitions. Further, the detailed mechanistic study of solvent-assisted light-induced tautomerization with the role of hydrogen bonding and the following WRITE-READ-ERASE-READ system have been derived by using molecular logic gates.
Synthesis and antimicrobial activity of 4-methylthiazole and 4-thiazolidinone derivatives derived from 5-(aryldiazo)salicylaldehyde thiosemicarbazones
Salem, Mohamed A.,Abbas, Samir Y.,El-Sharief, Marwa A. M. Sh.,Alzahrani, Abdullah Y.,Helal, Mohamed H.,Thabet, Hamdy Kh.
, p. 3325 - 3331 (2021/08/30)
New series of thiazole derivatives were synthesized using 5-(aryldiazo)salicylaldehyde thiosemicarbazones 2a–i. Cyclocondensation of thiosemicarbazones 2a–i with chloroacetone afforded the corresponding 4-methylthiazole derivatives 3a–i. Moreover, cycloal
