On the preparation and spectral properties of some hydroxy-substituted triphenylmethane dyes
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Horst Hartmann
Abstract
Although the first hydroxy substituted triphenlymethane dyes were prepared at the beginning of the 19th century, they found, other than their amino-substituted derivatives, surprisingly less scientific and practical interest hitherto. Only triphenylmehane dyes derived from salicylic acid and some of its derivatives received practical importance as Mordant Dyes. To close this gap, we have prepared and characterized few hydroxy-substituted triphenlymethane dyes by starting from appropriate phenols and using different synthetic routes. The structure of the hydroxy-substituted triphenlymethane dyes prepared are confirmed by means of mass spectra and 1H NMR spectra. Their colors vary with the acidity of the solutions and is originated by a stepwise protonation of the oxygen moieties at their triphenylmethane cores.
Funding source: There is no funding
Acknowledgments
The author thanks Dr. S. Machill for measuring the absorption spectra, Mrs. A. Rudolph for measuring the 1H HMR spectra and Dr. I. Bauer for measuring the mass spectra.
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Research ethics: Not applicable.
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Informed consent: Not applicable.
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Author contributions: The author has accepted responsibility for the entire content of this manuscript and approved its submission.
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Use of Large Language Models, AI and Machine Learning Tools: None declared.
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Conflict of interest: The author states no conflict of interest.
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Research funding: None declared.
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Data availability: Not applicable.
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Honorarium: Dedicated to Dr. Alfred Keil on the occasion of his 100th birthday.
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Supplementary Material
This article contains supplementary material (https://doi.org/10.1515/znb-2024-0112).
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Articles in the same Issue
- Frontmatter
- In this issue
- Research Articles
- Chemical aspects of the preparation of Vulcanised Fibre using zinc chloride hydrates: from a brief history to a new consideration of the key reactions in ionic liquids
- On the preparation and spectral properties of some hydroxy-substituted triphenylmethane dyes
- High-pressure synthesis and crystal structure of Ga5Na1–x B12O26–x (OH) x (x = 0.12)
- Intermetallic phases with Ho4Ir13Ge9-type structure
- Interplay between oxidative addition and reductive elimination at a diruthenium complex bearing the bis(diphenylphosphanyl)amine ligand
- Anthracene-d- and l-phenylalanine derivatives: synthesis, dual-state emission, mechanochromic luminescence, chiroptical property and enantioselective recognition of free amino acids
- Synthesis, structures and optical properties of 3,3′-disubstituted biphenyl compounds
