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Beilstein J. Org. Chem. 2018, 14, 1871–1884, doi:10.3762/bjoc.14.161
Graphical Abstract
Figure 1: Structures of 9-substituted benzo[b]quinolizinium derivatives 1 and 2.
Scheme 1: Synthesis of benzo[b]quinolizinium-9-trifluoroborate (3b) and 9-arylbenzo[b]quinolizinium derivativ...
Scheme 2: Synthesis of 9-(arylethynyl)benzo[b]quinolizinium derivatives 2a–d.
Figure 2: Molecular structures of derivatives 2a (top) and 2b (bottom) in the solid state. Ellipsoids are sho...
Figure 3: Absorption spectra of derivatives 2a (A), 2b (B), 2c (C) and, 2d (D); c = 20 μM; solvents: H2O (mag...
Figure 4: Emission spectra of derivatives 2a (A), 2c (B) and 2d (C); c = 20 μM; λex = 375 nm; solvents: H2O (...
Figure 5: Photometric (A) and fluorimetric (B) acid-base titration of 2c; c = 20 μM in Britton–Robinson buffe...
Figure 6: Photometric titration of 2a (A), 2b (B), 2c (C), and 2d (D) with ct DNA in BPE buffer (16 mM Na+; 5...
Figure 7: Photometric titration of 2a (A), 2b (B), 2c (C) and 2d (D) with 22AG in potassium phosphate buffer ...
Figure 8: Fluorimetric titration of 2a (A), 2b (B) and 2d (C) with ct DNA in potassium phosphate buffer (95 m...
Figure 9: Fluorimetric titration of 2a (A) and 2d (B) with 22AG in potassium phosphate buffer (95 mM K+; 5% D...
Scheme 3: Photoinduced charge transfer upon the excitation of derivative 2d.
Beilstein J. Org. Chem. 2014, 10, 2963–2974, doi:10.3762/bjoc.10.314
Scheme 1: Equilibrium between single-stranded ILPR-DNA a2 and its parallel and antiparallel quadruplex form.
Figure 1: Structures of ligands 1–6 used in this study.
Figure 2: A) CD spectra of ILPR-DNA a2 (20 μM) at different temperatures in potassium phosphate buffer (95 mM...
Figure 3: CD spectra of ILPR-sequence a2 (20 µM) in potassium phosphate buffer (95 mM, pH 7.0; __ : immediate...
Figure 4: Fluorimetric monitoring of thermal DNA-denaturation of the ILPR quadruplex Fa2T (0.2 μM DNA concent...
Figure 5: Fluorimetric titration of 1a (A), 1b (B), 1c (C), 1d (D) and 1e (E) with a2 in potassium phosphate ...
Figure 6: Fluorimetric titration of 2 (A), 3 (B), 4 (C), 5 (D) and 6 (E) with a2 in potassium phosphate buffe...
Figure 7: Job plot from fluorimetric analysis of mixtures of ligands 1e (A), 4 (B) and 6 (C) with ILPR-DNA a2...
Figure 8: CD spectra of ILPR-DNA a2 in the presence of 1d (A), 1e (B), 2 (C), 4 (D), 5 (E) and 6 (F) at LDR =...