Spectral properties of tolan and its supramolecular complexes in solution and silicate hydrogel

Мұқаба

Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Рұқсат ақылы немесе тек жазылушылар үшін

Аннотация

The complexation process of tolane and α-cyclodextrin in water, aqueous-ethanol solution and silicate hydrogel based on tetrakis(2 hydroxyethyl)orthosilicate was studied. The complex formation in solutions were confirmed by electron and 1H NMR spectroscopy, and the stability constant of the complex was determined using spectrofluorimetric titration (lgK1:1 = 1.5). The preservation of the inclusion complex during the preparation of the gel was confirmed by electron spectroscopy.

Толық мәтін

Рұқсат жабық

Авторлар туралы

G. Novitskii

Photochemistry Center of the Russian Academy of Sciences, Federal Research Center “Crystallography and Photonics” – National Research Center “Kurchatov Institute”

Хат алмасуға жауапты Автор.
Email: georg.nov97@gmail.com
Ресей, Moscow, 119421

A. Medvedeva

Photochemistry Center of the Russian Academy of Sciences, Federal Research Center “Crystallography and Photonics” – National Research Center “Kurchatov Institute”

Email: georg.nov97@gmail.com
Ресей, Moscow, 119421

A. Koshkin

Photochemistry Center of the Russian Academy of Sciences, Federal Research Center “Crystallography and Photonics” – National Research Center “Kurchatov Institute”

Email: georg.nov97@gmail.com
Ресей, Moscow, 119421

A. Vedernikov

Photochemistry Center of the Russian Academy of Sciences, Federal Research Center “Crystallography and Photonics” – National Research Center “Kurchatov Institute”

Email: georg.nov97@gmail.com
Ресей, Moscow, 119421

N. Lobova

Photochemistry Center of the Russian Academy of Sciences, Federal Research Center “Crystallography and Photonics” – National Research Center “Kurchatov Institute”; Moscow Institute of Physics and Technology

Email: georg.nov97@gmail.com
Ресей, Moscow, 119421; Dolgoprudny, 141701

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Әрекет
1. JATS XML
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2. Fig. 1. Hydrolysis of THEOS.

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3. Fig. 2. Polycondensation reaction.

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4. Fig. 3. Formation of a three-dimensional gel matrix.

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5. 4. 1H NMR spectrum of THEOS.

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6. 5. Structural formulas of tolan (a) and α-cyclodextrin (b) molecules.

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7. 6. The PMR spectrum of the tolan–α-cyclodextrin mixture in D2O, with an increase in significant peaks in the aromatic region of the spectrum.

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8. 7. Changes in the absorption (a) and fluorescence (b, lex = 295 nm) spectra during titration of tolane with a-cyclodextrin solution.

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9. 8. Fluorescence spectra of lex = 295 nm tolane and its complexes in solution and gel.

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10. Fig. 9. Baseline for the absorption spectrum (a) of the hydrogel obtained by the improved method and the transmission values (b) of the hydrogels obtained at different pH.

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11. 10. Fluorescence spectra lex = 295 nm of tolan and its complexes in solution and gel, normalized to the values of maxima.

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