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A novel route is described to obtain 2-aminoimidazole azo dyes with a unique substituent pattern in the heteroaryl unit that provides halochromic properties, exhibiting vibrant colours that change from magenta to deep blue. Potent antimicrobial properties against infectious yeasts were demonstrated. No cytotoxicity was detected for concentrations lower than 16 μg mL.
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http://dx.doi.org/10.1039/d3cc00372h | DOI Listing |
J Cell Mol Med
September 2025
Centre for Global Health Research, Saveetha Medical College and Hospital, Saveetha Institute of Medical and Technical Sciences, Chennai, India.
Antibiotic resistance is the never-ending war among medical researchers and microbial life forms. The extensive evolving potential of the microorganisms, in combination with improper usage, storage and disposal of the marketed antibiotics generated from natural or artificial sources, always calls for the need for novel antimicrobial agents with different modes of action. In this project, azo-oxime complexes of iron and manganese (seven in total) have been applied to wild multidrug-resistant pathogenic bacterial strains (isolated from sewage water of hospital).
View Article and Find Full Text PDFAngew Chem Int Ed Engl
September 2025
Institute of Theoretical Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 17, Vienna, 1090, Austria.
Arylazopyrazoles are versatile photoswitches with excellent photochromic properties and tunable thermal half-lives, yet the mechanistic role of substituents in controlling thermal stability remains poorly understood. Here, we synthesized an extensive library of arylazo-1,3,5-trimethylpyrazole photoswitches and rationalized the influence of para-substituents on the thermal half-lives, finding excellent agreement between calculated and measured trends. Calculations show that the electron-donating and electron-withdrawing nature of the substituents modulates the back-isomerization process through at least two distinct mechanisms.
View Article and Find Full Text PDFAnal Chim Acta
October 2025
Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei, 230036, China. Electronic address:
Background: The excessive use of pesticide pollutants in agricultural production seriously threatens food safety. Traditional detection techniques are difficult to meet the detection requirements due to the complex sample pretreatment and high detection costs. The immunochromatography method (ICA) is simple to operate and fast, and is suitable for on-site rapid detection.
View Article and Find Full Text PDFJ Fluoresc
September 2025
University Mustapha Stambouli of Mascara, Mascara, Algeria.
Far-ultraviolet radiation poses significant health and environmental risks, so developing effective attenuation methods is essential. This study explores the potential of red dyes as optical filter materials which can block harmful far-ultraviolet radiation while allowing visible light to pass through. A series of red dyes including congo red, methyl red, neutral red, phenol red, and carminic acid were subjected to detailed spectroscopic analysis to evaluate their absorption capabilities in the far-ultraviolet range.
View Article and Find Full Text PDFChemphyschem
September 2025
School of Materials and Physics, China University of Mining and Technology, Xuzhou, 221116, China.
Advanced oxidation processes offer a potent, eco-friendly solution for degrading organic wastewater. Creating high-activity and stability catalysts is crucial to addressing water pollution concerns. Nevertheless, due to constraints in their preparation, prevalent catalysts often lack satisfactory cyclic stability and pose challenges in recovery.
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