Results 81 to 90 of about 52,300 (269)

Synthesis Development and Molecular Docking Study of New Azo Chalcone Derivatives

ARO-The Scientific Journal of Koya University
This work is divided into two main parts. The first part involves the synthesis of new azo chalcone compounds through a two-step process. Initially, azo compounds are synthesized by diazotizing 3-nitroaniline, followed by a coupling reaction with 4 ...
Myasar Kh. Ibrahim, Shireen R. Mohammed
doaj   +1 more source

Isomerization Mechanism in Hydrazone-Based Rotary Switches: Lateral Shift, Rotation, or Tautomerization? [PDF]

, 2011
Two intramolecularly hydrogen-bonded arylhydrazone (aryl = phenyl or naphthyl) molecular switches have been synthesized, and their full and reversible switching between the E and Z configurations have been demonstrated.
Aprahamian, Ivan, Benítez, Diego, Elhabiri, Mourad, Goddard, William A., III, Lafranchi, Don Antoine, Landge, Shainaz M., Tkatchouk, Ekaterina   +6 more
core   +1 more source

Chromogenic guest-responsive host compounds which allow rapid guest screening [PDF]

, 2002
Azo host compounds undergo rapid and clearly visible colour changes from yellow to bright orange/red on complexation with guest molecules, while no colour change is noted in the absence of complexation.
Andrew　P Downie, Asami Masaya, Janet L Scott, Tanaka Koichi, 浅海 誠哉, 田中 耕一   +5 more
core   +2 more sources

Photonic Time Crystals and Time‐Varying Electromagnetic Metamatter: A New Direction for Ultrafast Tunable Photonic and Microwave Materials and Devices

Advanced Science, EarlyView.
Photonic time crystals (PTCs) are systems in which electromagnetic parameters are modulated periodically in time, producing momentum bandgaps via temporal scattering rather than spatial Bragg processes. This review examines the theoretical frameworks, modeling, and computational tools for time‐varying media, and summarizes experimental demonstrations ...
Ranjan Kumar Patel, Shriram Ramanathan, Ronald P. Jenkins, Michael J. Carter   +3 more
wiley   +1 more source

Semi-empirical design and synthesis of novel 4-hydroxy-6-sulphonaphthyl azohydroxynaphthalenes with predominant hydrazone form

Scientific African
Due to their enhanced photochromic effects, hydrazone forms of tautomeric azo compounds are commercially preferred as photoreceptors and binary switches.
Olusegun E. Thomas, Olajire A. Adegoke
doaj   +1 more source

Synthesis, characterization and biological investigations of potentially bioactive heterocyclic compounds containing 4-hydroxy coumarin

Heliyon, 2020
In this paper, we have reported the synthesis of a series of heterocyclic azo dyes containing 4-hydroxy coumarin by diazo-coupling reaction. The structural aspect of the newly synthesized compounds was accomplished by various physico-chemical techniques ...
O. Nagaraja, Yadav D. Bodke, Itte Pushpavathi, S. Ravi Kumar   +3 more
doaj   +1 more source

Multimodal Cross‐Attentive Graph‐Based Framework for Predicting In Vivo Endocrine Disruptors

Advanced Science, EarlyView.
A multimodal cross‐attentive graph neural network integrates molecular graphs with androgen and estrogen adverse outcome pathway (AOP)–anchored in vitro assay signals to predict in vivo endocrine disruption. By fusing information on Tier‐1 AOP logits with chemical structures, the framework achieves high accuracy and provides assay‐traceable ...
Eder Soares de Almeida Santos, Gustavo Felizardo Santos Sandes, Artur Christian Garcia da Silva, Holli‐Joi Martin, Eugene N. Muratov, Rodolpho de Campos Braga, Bruno Junior Neves   +6 more
wiley   +1 more source

Design and Structural Characterization of Novel Azo-Theophylline as Acid-Base Indicator

Ibn Al-Haitham Journal for Pure and Applied Sciences
     Novel heterocyclic acid-base indicators 8-[3-(phenol)azo] theophylline (PAT) and 8[1-(6-sulfonic acid naphthalene) azo] theophylline (SAT) were synthesized through the reaction between m-amino phenol and 1-amino naphthalene -6-sulfonic acid with ...
Mohnned hamady Manulla, Alyaa Khidir Abbas   +1 more
doaj   +1 more source

New AZO Compounds Derivatives Based on 4- chloro-2-((5-formyl-2-hydroxy-3-methoxyphenyl) diazenyl)benzenesulfonamide: Preparation, diagnostic, Spectroscopic, Antioxidant and Antimicrobial efficiency [PDF]

Journal of Bioscience and Applied Research
In this study, two series of compounds have been prepared based on azo compound 4-chloro-2-((5-formyl-2-hydroxy-3-methoxyphenyl)iazinyl) benzene sulfonamide (A1) which prepared by diazotization of 2-amino-4-chlorobenzen sulfonamide and 4-hydroxy -3 ...
Dania Saleh, Bushra Al-Salami
doaj   +1 more source

Indirect determination of dopamine and paracetamol by electrochemical impedance spectroscopy using azo coupling reaction with oxidized 2,4-dinitrophenylhydrazine (DNPH): Application in commercial tablets

Journal of Science: Advanced Materials and Devices, 2020
A new method for the determination of dopamine (DA) and paracetamol (PCT), based on the azo “coupling reaction with oxidized 2,4-dinitrophenylhydrazine (DNPH), has been established.
W. Boumya, M. Achak, M. Bakasse, M.A. El Mhammedi   +3 more
doaj   +1 more source