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2 article(s) from Barsella, Alberto

Symmetrical D–π–A–π–D indanone dyes: a new design for nonlinear optics and cyanide detection

Ergin Keleş,
Alberto Barsella,
Nurgül Seferoğlu,
Zeynel Seferoğlu and
Burcu Aydıner

Beilstein J. Org. Chem. 2026, 22, 131–142, doi:10.3762/bjoc.22.6

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Figure 1: Design of the functional dyes.

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Scheme 1: Synthetic pathway of compounds.

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Figure 2: Normalized absorption spectra of dyes 2a (a), 2b (b), and 2c (c); Photographs of dyes in the given ...

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Figure 3: Absorption spectra of dyes 2a (a), 2b (b), and 2c (c) upon addition of 20 equiv of anions in DMSO; ...

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Figure 4: Absorption spectra of titrated dyes (2a–c) with up to 50 equiv of CN⁻ (a) 6:4, (b) 7:3, and (c) 4:6...

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Figure 5: Partial ¹H NMR spectral change of 2b (c = 10 mM) after up to 2 equiv of TBACN (c = 1 M) in DMSO-d₆.

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Scheme 2: Proposed interaction mechanism with CN⁻.

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Figure 6: Optimized geometries of 2a–c and 2a–c+CN⁻ obtained at the B3LYP/6-31+G(d,p) level.

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Figure 7: Frontier molecular orbitals of a) 2a, b) 2a+CN⁻.

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Figure 8: TGA curves of dyes.

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Published 14 Jan 2026

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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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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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Published 14 Sep 2020

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