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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.
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Compound Alizarin Red Swith free spectra: 2 NMR, 7 FTIR, and 1 UV-Vis.
affecting the dominant absorption in the UV-Vis spectra of alizarin and alizarin Red S, we investigate how the electronic structure of the ground state and the lowest energy excited
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).
5 mar 2024 · For such, we have performed a comprehensive study of electronic effects of substituents in position C 3 of alizarin by means of a time dependent DFT approach. These auxochromes attached to the chromophore are proven to alter both the wavelength and intensity of absorption.
