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2 article(s) from Seferoğlu, Zeynel

Photochromic derivatives of indigo: historical overview of development, challenges and applications

Gökhan Kaplan,
Zeynel Seferoğlu and
Daria V. Berdnikova

Beilstein J. Org. Chem. 2024, 20, 228–242, doi:10.3762/bjoc.20.23

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Graphical Abstract

Figure 1: Precursors used in the synthesis of indigo [4].

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Figure 2: a) Intramolecular (a = 2.26 Å) and intermolecular (b = 2.11 Å) hydrogen bonds in indigo, b) crystal...

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Figure 3: Bond length in the indigo molecule obtained from the single crystal X-ray analysis [12], the typical bo...

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Figure 4: The structure of the indigo chromophore (H-chromophore, highlighted in blue), asterisk indicates th...

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Figure 5: Influence of substituents in the benzene rings on the color of indigo derivatives.

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Figure 6: a) E–Z photoisomerization of indigo and b) photoinduced proton transfer in the excited state, aster...

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Figure 7: Structures of indigo derivatives discussed in this review.

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Figure 8: Photoswitching of N,N'-diacetylindigo (9a) in CCl₄ (c = 17.1 µM; cell length = 5.0 cm) irradiated w...

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Figure 9: Photoisomerization of compound 18c upon irradiation with red light and schematic representation of ...

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Figure 10: Schematic representation of indigo-type (left) and amide-type (right) resonances in N,N'-acetylindi...

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Figure 11: Suggested intermediates for the double bond cleavage for the thermal relaxation of N,N'-diacylindig...

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Figure 12: Zwitterionic resonance structures of Z-indigo.

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Figure 13: Photos of crystalline N,N'-di(Boc)indigo 17a its solutions in 1) DMSO, 2) DMF, 3) N-methyl-2-pyrrol...

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Figure 14: Structural isomers of indigo.

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Figure 15: Photochromism of indirubin derivatives and supramolecular complexation of the E-isomers with Schrei...

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Figure 16: Photoisomerization of the protonated isoindigo.

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Review

Published 07 Feb 2024

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Styryl-based new organic chromophores bearing free amino and azomethine groups: synthesis, photophysical, NLO, and thermal properties

Anka Utama Putra,
Deniz Çakmaz,
Nurgül Seferoğlu,
Alberto Barsella and
Zeynel Seferoğlu

Beilstein J. Org. Chem. 2020, 16, 2282–2296, doi:10.3762/bjoc.16.189

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Graphical Abstract

Scheme 1: Synthetic pathways of dyes 3–7 and Schiff base analogs 8–12.

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Figure 1: The optimized geometry of dyes 3 and 8.

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Figure 2: Absorption spectra of dyes 3 (a, left) and 8 (b, right). Inset: Color of dyes 3 and 8 in the given ...

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Figure 3: Emission spectra of dyes 3 (a, left) and 8 (b, right). Inset: Color of dyes 3 and 8 in the indicate...

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Figure 4: Red shift phenomena with changing substituents in absorption (a, left) and emission (b, right) spec...

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Figure 5: Absorption (a, left) and emission (b, right) change of dye 12 upon addition of 15 equiv of TBAOH an...

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Figure 6: Photographs of dye 12 (left, ambient light), without, after the addition of 15 equiv of TBAOH (midd...

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Figure 7: Absorption (a, left) and emission (b, right) change of 8 in Britton–Robinson buffer solutions at di...

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Figure 8: Photographs of dye 8 in Britton–Robinson buffer solutions at different pH values.

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Figure 9: Sigmoid function obtained from dye 8 UV–vis absorption spectra during pH investigation.

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Figure 10: TGA curves of all synthetized dyes.

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Full Research Paper

Published 14 Sep 2020

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