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Beilstein J. Org. Chem. 2020, 16, 111–124, doi:10.3762/bjoc.16.13
Graphical Abstract
Scheme 1: Synthesis of styrylquinolizinium derivatives 3a–d.
Figure 1: Absorption spectra and normalized emission spectrum (Abs. = 0.10, 3b: λex = 394 nm) of derivatives ...
Figure 2: Spectrophotometric titration upon the addition of ct DNA to the styrylquinolizinium derivatives 3a ...
Figure 3: Spectrofluorimetric titration upon the addition of ct DNA to the styrylquinolizinium derivatives 3a...
Figure 4: CD and LD spectra of the styryl derivatives 3a (A), 3b (B), 3c (C), and 3d (D) with ct DNA in BPE b...
Figure 5: Spectrophotometric monitoring of the irradiation of styrylquinolizinium derivatives 3a (A), 3b (B), ...
Figure 6: Absorption of the monomers (c = 20 µM, red) 3b (A) and 3c (B) and their dimers (black) 4b and 4c in...
Figure 7: Photometric monitoring of the photoreaction of 3b (c = 20 µM) to the dimer 4b by irradiation at ca....
Figure 8: ORTEP drawings of cyclobutane derivatives 4b (A) and 4c (B) in the solid state (thermal ellipsoids ...
Scheme 2: Possible pathways for the selective photodimerization of styrylquinolizinium derivatives 3b and 3c.
Figure 9: A) Spectrophotometric titration of ct DNA to dimer 4b in BPE buffer (cL = 20 µM, cct DNA = 1.45 mM, ...
Figure 10: A) Photometric and B) CD spectroscopic monitoring of the photoinduced switching (4b: λex = 315 nm, ...
Scheme 3: Photoinduced switching of the DNA binding properties of styrylquinolizinium compound 3b.