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5 mar 2024 · The auxochromic effect of the different substituents on the UV-Vis spectrum relative to alizarin will be analyzed by quantifying the changes in the relative positions of the ground and lowest excited electronic states.
31 sty 2022 · While the three UV-vis absorption spectra share the same general shape, it turns out that adding electron donating hydroxyl groups is shifting the spectrum from near UV (9,10-anthraquinone) to visible (alizarin: violet, purpurin: blue).
1 wrz 2024 · By combining computational insights with experimental data, our study has demonstrated the great efficiency of the optimized computational protocol for accurately predicting UV–Vis spectra, CIELAB color coordinates, and NMR shift of alizarin, the main coloring molecule of Madder, and its analog alizarin red S.
1 maj 2022 · The simulated absorption spectrum of the Alizarin dye exhibited two maxima at 240 nm and 431 nm in the UV and visible range, respectively. A good qualitative agreement between the experiment and the TD-DFT calculations was observed.
It is shown that the introduction of an electron-donor group in alizarin causes the transition bands to be significantly red-shifted whereas electron-withdrawing groups cause a minor blue-shifting. Keywords: Alizarin; Aromaticity; Density Functional Theory; Electronic structure; UV-vis.
1 kwi 2014 · UV–Vis spectra for 1 recorded in liquid ACN solution (a) and in the solid phase (b). Original experimental spectra are shown as heave black lines, while Gaussian components as blue lines. Contribution of tautomers is shown as light gray lines.
5 mar 2024 · Adjusting UV-Vis Spectrum of Alizarin by Insertion of Auxochromes. Sign in | Create an account. https://orcid.org. Europe PMC ... Search life-sciences literature (44,900,782 articles, preprints and more) Search. Advanced search. Feedback ...
