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1 article(s) from Pittelkow, Michael

Tautomerism and switching in 7-hydroxy-8-(azophenyl)quinoline and similar compounds

Lidia Zaharieva,
Vera Deneva,
Fadhil S. Kamounah,
Nikolay Vassilev,
Ivan Angelov,
Michael Pittelkow and
Liudmil Antonov

Beilstein J. Org. Chem. 2025, 21, 1404–1421, doi:10.3762/bjoc.21.105

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Scheme 1: Investigated compounds.

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Scheme 2: Long-range PT in the studied compounds along with undesired processes of E/Z isomerization. The ind...

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Figure 1: Simulated absorption spectra of the tautomers of 1 in toluene. The spectra in acetonitrile are show...

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Figure 2: Normalized absorption spectra of 1.

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Figure 3: Absorption spectra of 1 in acetonitrile with stepwise addition of water.

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Figure 4: VT ¹H NMR spectra of compound 1 in acetonitrile-d₃.

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Figure 5: Changes in the absorption spectrum of 2 in acetonitrile upon addition of trifluoroacetic acid (TFA)...

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Figure 6: Ground (M06-2X/TZVP) and excited (CAM-B3LYP/TZVP) state potential energy surface of compound 1 in t...

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Figure 7: Changes of the absorbance of compound 1 at 465 nm in toluene upon turning on and off the irradiatio...

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Figure 8: a) Change of ΔE(K-E) in kcal/mol as a function of the substitution on different positions (2–6) in ...

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Scheme 3: Perspective switching compounds, generated by the computational quantum chemistry calculations.

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Published 10 Jul 2025

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