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Beilstein J. Org. Chem. 2021, 17, 2450–2461, doi:10.3762/bjoc.17.162
Graphical Abstract
Figure 1: Some important tetrahydroacridines used as drugs.
Scheme 1: Synthesis of 2.
Scheme 2: Synthesis of compounds 4a–g.
Figure 2: UV–vis absorption spectra of 4a–d at room temperature in dilute dichloromethane solutions (c = 1 × ...
Figure 3: Fluorescence spectra of 4a–d at room temperature in dilute dichloromethane solutions (c = 1 × 10−5 ...
Figure 4: A) Absorbance and B) emission spectra for the standard quinine sulfate (SQ).
Figure 5: A) Absorbance and B) fluorescence spectra for 4b.
Figure 6: A) Plot of fluorescence intensities against their absorbances for quinine sulfate (SQ) and B) plot ...
Figure 7: Selected dihedral angles (°) for compounds 4a–d.
Figure 8: Selected dihedral angles (°) for compound 4f.
Figure 9: Calculated energy levels for compounds 4a–d and their spatial distribution of the HOMO–LUMO frontie...
Figure 10: Visualization of MEP for compounds 4a–d calculated by B3LYP method with 6-31G(d) basis set.
Figure 11: Cyclic voltammogram for 4c in 0.1 M (n-Bu)4NBF4/acetonitrile at a scan rate of 50 mV/s.
Beilstein J. Org. Chem. 2021, 17, 1629–1640, doi:10.3762/bjoc.17.115
Figure 1: Applications of acridines.
Scheme 1: Synthesis of 2,4-dibromo-9-chloro-5,6,7,8-tetrahydroacridine (2).
Scheme 2: Synthesis of 2,4-bis(arylethynyl)-9-chloro-5,6,7,8-tetrahydroacridines 4a–g.
Figure 2: UV–vis absorption spectra of 4a,b and 4e–g in diluted dichloromethane solutions at room temperature...
Figure 3: Emission spectra of 4a,b and 4e–g in diluted dichloromethane solutions at room temperature (c = 1 ×...
Beilstein J. Org. Chem. 2015, 11, 1175–1186, doi:10.3762/bjoc.11.132
Figure 1: Structure of Eriochrome Blue Black B.
Scheme 1: Cyclopalladation reactions of (S)-4-isopropyl-2-(naphthalen-1-yl)oxazoline.
Scheme 2: Synthesis of cyclopalladated complex from bis-oxazoline.
Figure 2: ORTEP drawing of the complex 8.
Scheme 3: Synthesis of the bis(oxazoline) coordinated complexes.
Figure 3: ORTEP drawing of the complex 9.
Figure 4: Change in color removal in the presence of different catalysts within 10 min (before filtration). T...
Figure 5: Change in color removal in the presence of different catalysts (after filtration over 10 min).
Figure 6: Evolution of the color degradation against time using Eriochrome plus H2O2, the complex plus H2O2 o...
Figure 7: Change of the concentration of the Erio solution with the variation of H2O2 dose.
Figure 8: Evolution of the color removal against initial dye concentration.
Figure 9: Change of the color removal versus temperature.
Figure 10: Recycling experiments for Erio removal (C0 = 30 ppm, 20 mL) in the presence of catalyst 9 at pH 7 a...
Scheme 4: Proposed mechanism of decolorization.