ArticleScientific reports2025
Solvent polarity effect on photophysical properties of some aromatic azo dyes with focus on tautomeric and toxicity competition.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Adsorptive and photocatalytic strategies for carmoisine removal: mechanisms, material innovations, and environmental implications.RSC advances · 2026Review
- Solvent-Mediated Control of Twisted Intramolecular Charge Transfer in 7-(Diethylamino)coumarin-3-carboxylic Acid.Molecules (Basel, Switzerland) · 2025Article
- Solvatoalignment index and solvent-dependent behavior of asymmetric discotic liquid crystals: effect of polarity and alkyl chain length.Scientific reports · 2025Article
- Solvent-induced photophysical properties and stability of clonazepam and Chlordiazepoxide.Scientific reports · 2025Article
- Influence of hydrogen bonding on twisted intramolecular charge transfer in coumarin dyes: an integrated experimental and theoretical investigation.RSC advances · 2025Article
Corrections and comments
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Edible dyes have become an essential part of modern life, widely appreciated for their safety and effectiveness in food coloring. Given the fundamental role of hydrogen bonding in chemical and biological systems, this study explores the photophysical properties of three commonly used aromatic azo food dyes-Ponceau 4R, Sunset Yellow, and Tartrazine-across both isotropic solvents and anisotropic environments. To better understand their environmental interactions in ground and excited states, the influence of media polarity on these dyes was also explored. The study further evaluated the applicability of the Kamlet-Abboud-Taft polarity scale in capturing these effects. The results highlight the crucial role of hydrogen bonding in facilitating azo-hydrazone tautomerization and enhancing structural resonance. Additionally, the toxicity of these dyes on kidney cells was assessed using the MTT assay, revealing that Ponceau 4R exhibits notable toxicity, primarily due to solute-solvent interactions. Notably, the hydrazone tautomeric form was identified as the predominant species in this dye.
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Registered trials
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