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Sizova, Z. A.; Karasev, A. A.; Lukatskaya, L. L.; Rubtsov, M. I.; Дорошенко, А. О.

doi:10.1023/a:1019652918510

Cited by 4 publications

(3 citation statements)

References 7 publications

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“…In a 30:70 ethanol/water mixture, their pKa values fall in the range of 4.5−5.0 . In a 50:50 ethanol/water mixture, their pKa values are around 4.20 . Consequently, a significant proportion of the molecules should be protonated in water at pH = 5.5.…”

Section: Discussionmentioning

confidence: 99%

“…Consequently, a significant proportion of the molecules should be protonated in water at pH = 5.5. It has been shown that protonation on the benzimidazolyl group leads to a strong shift of the absorption and emission maxima. , For instance, the absorption and emission maxima for 1 have been reported to be 454 and 498 nm, respectively, in water containing 30% ethanol, and 479 and 513 nm after addition of 1.7 M trifluoroacetic acid. For 2 , the values are 425 and 489 nm, respectively, in water with 30% ethanol, and 450 and 504 nm in the presence of acid .…”

Section: Discussionmentioning

confidence: 99%

“…Nanofibers can be used as templates for metal nanowire formation. , According to their high surface area, they can promote cell attachment for tissue engineering . If made of fluorescent molecules, they can also be used to study the propagation of light in self-assembled systems 1,38,44,45 and could find applications as new materials for sub-micrometer-sized optoelectronics. , It is nice to see that these structures can be obtained in a reproducible way from simple molecules, with easy handling and safe preparation from aqueous solution.…”

Section: Discussionmentioning

confidence: 99%

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Spontaneous Formation of Fluorescent Nanofibers from Self-Assembly of Low-Molecular-Weight Coumarin Derivatives in Water

et al. 2008

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A solvent-exchange process was applied to three fluorescent dyes belonging to the 2-benzimidazolyl-7-diethylaminocoumarin series (namely Coumarin 7 (1), Coumarin 30 (2), and one of their derivatives bearing a butyl chain (3)). The three compounds only differ by the substitution of the nitrogen atom of the benzimidazolyl group. They were first dissolved in acetone and then suddenly placed in an aqueous environment where they generated molecular assemblies. The size and shape of the latter were studied by fluorescence microscopy and transmission and scanning electron microscopy. It appeared that 1 gave aggregates and flat microcrystals that evolved toward elongated structures. 2 formed straight nanofibers that are 10-20 microm long and exhibit a crystal structure. 3 gave short fibers (1 micromx25 nm), which finally arrange into entangled solid nanofibers. The formation of fibers arising from low-molecular-weight molecules was particularly interesting. The optical properties of the free-standing particles in suspension were analyzed and compared to those of highly dilute dyes, with the aim to get additional information about the dye arrangement in the nanostructures.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Spontaneous Formation of Fluorescent Nanofibers from Self-Assembly of Low-Molecular-Weight Coumarin Derivatives in Water

et al. 2008

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Bichromophoric fluorescent dyes with rigid molecular structure: fluorescence ability regulation by the photoinduced intramolecular electron transfer

Syzova

Дорошенко

Lukatskaya

et al. 2004

Journal of Photochemistry and Photobiology A: Chemistry

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Clean Procedure and DFT Study for the Synthesis of 2‐Amino‐3‐ethoxycarbonyl‐4‐(aryl)‐4H‐pyrano‐[3,2‐c]‐chromene‐5‐ones Derivatives: A Novel Class of Potential Antimicrobial and Antioxidant Agents

Medyouni

Hamdi

Said

et al. 2012

Journal of Chemistry

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2-Amino-3-ethoxycarbonyl-4-(aryl)-4H-pyrano-[3,2-c]-chromene-5-ones 5 is synthesized by the two-component reaction of 4-hydroxycouamrin with ethyl-2-cyano-3-(aryl) acrylate 3. e structures of the obtained compounds are con�rmed by analytical IR, 1 H, and 13 C-NMR spectra to elucidate the different positions of protons and carbons and as well as theoretic studies (DFT/B3LYP). All the newly synthesized compounds are screened for their antibacterial. Furthermore, these compounds showed antioxidant activities of different extents with respect to individual compounds as well as to the antioxidant methods. e compounds 5a-e were found to be the most active antioxidant in the series then Trolox, which makes the investigated complexes a promising new class of antibacterial activity compounds.

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Untitled

Cited by 4 publications

References 7 publications

Spontaneous Formation of Fluorescent Nanofibers from Self-Assembly of Low-Molecular-Weight Coumarin Derivatives in Water

Spontaneous Formation of Fluorescent Nanofibers from Self-Assembly of Low-Molecular-Weight Coumarin Derivatives in Water

Bichromophoric fluorescent dyes with rigid molecular structure: fluorescence ability regulation by the photoinduced intramolecular electron transfer

Clean Procedure and DFT Study for the Synthesis of 2‐Amino‐3‐ethoxycarbonyl‐4‐(aryl)‐4H‐pyrano‐[3,2‐c]‐chromene‐5‐ones Derivatives: A Novel Class of Potential Antimicrobial and Antioxidant Agents

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