| 000 | 02773nab a2200337 c 4500 | ||
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| 001 | koha000925988 | ||
| 005 | 20221222134415.0 | ||
| 007 | cr | | ||
| 008 | 221221|2022 enk s a eng d | ||
| 024 | 7 |
_a10.1016/j.mtchem.2022.100776 _2doi |
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| 035 | _akoha000925988 | ||
| 040 |
_aRU-ToGU _brus _cRU-ToGU |
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| 100 | 1 |
_aTorbina, Viktoriia V. _9138773 |
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| 245 | 1 | 0 |
_aEffect of organic linker substituent on catalytic activity of UiO-66 metal-organic framework in selective oxidation of propylene glycol: homolytic versus heterolytic activation of hydrogen peroxide _cV. V. Torbina, S. Ten, O. V. Vodyankina |
| 336 | _aТекст | ||
| 337 | _aэлектронный | ||
| 504 | _aБиблиогр.: 57 назв. | ||
| 520 | 3 | _aA family of isoreticular metal-organic frameworks, based on the UiO-66 structure with NH2-, OH-, HSO3-, and NO2-substituted terephthalic acid, are synthesized and tested as catalysts in liquid-phase oxidation of propylene glycol (PG) with hydrogen peroxide and compared with the catalytic performances of unsubstituted UiO-66. The obtained materials are characterized by X-ray diffraction, FT-IR, thermogravimetric analysis (TGA), nuclear magnetic resonance spectroscopy (1H NMR), and Fourier-transform infrared spectroscopy (FT-IR) of adsorbed CO and scanning electron microscopy (SEM) methods. Hydroxyacetone (HA) is the main product over all X-UiO-66 catalysts under the reaction conditions used. The nature of substituent drastically affects the PG conversion and the oxidant utilization efficiency. The presence of electron-withdrawing groups in the organic linker leads to preferential heterotic activation of H2O2, whereas the increase of electron density around Zr active sites, promoted by electron-donating groups, enhances the unproductive homolytic oxidant decomposition. The insertion of NO2 group results in almost double increase in the HA yield (15.5 vs. 8.8%) and hydrogen peroxide utilization efficiency (98 vs. 36%) in comparison with the reaction catalyzed by H-UiO-66. The NO2-UiO-66 can be recycled without the loss of the catalytic activity and preserves its structure after the catalytic cycle. | |
| 653 | _aметаллоорганические каркасы | ||
| 653 | _aжидкофазное окисление | ||
| 653 | _aпропиленгликоль | ||
| 653 | _aсвязь структура-активность | ||
| 655 | 4 |
_aстатьи в журналах _9855669 |
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| 700 | 1 |
_aTen, Sergey _9507005 |
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| 700 | 1 |
_aVodyankina, Olga V. _936805 |
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| 773 | 0 |
_tMaterials today chemistry _d2022 _gVol. 24. P. 100776 (1-8) _x2468-5194 |
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| 852 | 4 | _aRU-ToGU | |
| 856 | 4 | _uhttp://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000925988 | |
| 908 | _aстатья | ||
| 999 | _c925988 | ||