S 70 Sol-gel synthesis of titanum dioxide by hydrolysis of titanium glycerolates and peroxides [Electronic resource] / V. A. Osipova, G. S. Zakharova, E. Andreikov, Yu. G. Yatluk, I. Puzyrev // Glass Physics and Chemistry. - 2013. - Vol.39, №4. - С. 398-402. - Bibliogr. : p. 402 (11 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): PHOTOCATALYSIS -- SOL-GEL -- TITANIUM DIOXIDE Аннотация: The sol-gel synthesis of titanium dioxide from titanium glycerolate (TG) and titanyl sulfate was studied. The effect of hydrothermal treatment in an autoclave at 130 C and refluxing TG with the peroxo titanium acid gel on the product properties, i.e.; morphology of the nanoparticles and their aggregates, as well as their ability to adsorption and photocatalytic degradation of methylene blue in aqueous solutions was discussed |
S 98 Synthesis and solar light catalytic properties of the titania-sulfide hybrid nanostructures / A. A. Rampel, E. A. Kozlova, T. I. Gorbunova, S. V. Cherepanova, E. Yu. Gerasimov, A. A. Valeeva, E. Yu. Korovin, S. V. Tsybulya, Ya. A. Shchipunov // 8-th European Meeting on Solar Chemistry and Photocatalysis: Environmental Applications - SPEA 8, Saloniki, 25-28 June 2014 : abstracts. - Saloniki : Aristotle University of Thessloniki, 2014. - С. 62 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): SYNTHESIS -- NANOSIZED METAL OXIDES -- TITANIUM DIOXIDE |
S 98 Synthesis and solar light catalytic properties of the titania-sulfide hybrid nanostructures / A. A. Rempel, E. A. Kozlova, T. I. Gorbunova, S. V. Cherepanova, E. Yu. Gerasimov, A. A. Valeeva, E. Yu. Korovin, S. V. Tsybulya, Ya. A. Shchipunov // 8th European Meeting on Solar Chemistry and Photocatalysis: Environmental Applications – SPEA8, Thessaloniki, 25-28 June 2014 : book of abstr. - Thessaloniki, 2014. - P. 62 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): CATALYTIC PROPERTIES -- TITANIA-SULFIDE HYBRID NANOSTRUCTURES |
Synthesis and physicochemical properties of nanostructured TiO2 with enhanced photocatalytic activity / I. B. Dorosheva, A. A. Valeeva, A. A. Rempel [et al.] // Inorganic Materials. - 2021. - Vol. 57, № 5. - P503-510 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): TITANIUM DIOXIDE -- SOL–GEL METHOD -- PHOTOCATALYSIS Аннотация: Nanostructured titanium dioxide (TiO2) with a crystallite size from 10 to 85 nm, photocatalytically active for organic reactions under illumination with visible light, has been prepared by a sol–gel process using a titanium tetrabutoxide solution in ethanol with an initial pH of 6. According to X-ray diffraction characterization results, the as-prepared titanium dioxide was amorphous. Annealing in a hydrogen atmosphere for 1 h at 400°C led to the formation of an anatase phase, and annealing in the temperature range from 600 to 800°C resulted in the anatase–rutile phase transition. The crystallite size of titanium dioxide increased from 10 to 75 nm as the annealing temperature was raised from 400 to 1000°C (furnace annealing for 1 h) and from 60 to 85 nm as the annealing time at a temperature of 800°C was increased from 30 to 240 min. Diffuse reflection spectra showed that the band gap of TiO2 decreased from 3.3 to 2.6 eV as the annealing temperature was raised from 200 to 1000°C. The specific surface area data obtained by BET measurements showed that the samples annealed at the highest temperature (1000°C) had the smallest surface area, which dropped from 307 to 1m2/g. The efficiency of the synthesized TiO2 tested as a catalyst for oxidative S H N cross-coupling of acridine with indole demonstrated an in crease in product yield from 35 to 80% as the annealing temperature was raised to 800°C. Varying the 800°C annealing time from 30 to 180 min had no effect on the reaction product yield, which ranged from 70 to 80%. |
Dataset of NMR-spectra pyrrolyl- and indolylazines and evidence of their ability to induce heat shock genes expression in human neurons / E. A. Dutysheva, I. A. Utepova, M. A. Trestsova [et al.] // Data in Brief. - 2021. - № 39. - P107562 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): PYRROLYLAZINES -- INDOLYLAZINES -- PHOTOCATALYSIS -- NUCLEAR MAGNETIC RESONANCE -- GREEN CHEMISTRY Аннотация: These data are related to our previous paper “Synthesis and approbation of new neuroprotective chemicals of pyrrolyl-and indolylazine classes in a cell model of Alzheimer’s disease” (Dutysheva et al., 2021), in which we demonstrate neu-roprotective abilities of pyrrolyl- and indolylazines in a cell model of Alzheimer’s disease. Using a novel procedure of photocatalysis we have synthesized a group of new compounds. The current article presents nuclear magnetic resonance spectra including heteronuclear single quantum coherence spectra of chemicals synthesized by us. The effect of new compounds have on heat shock proteins genes expression in reprogrammed human neurons are presented. We also presented data that verify neuronal phenotype of reprogrammed cells. |
Synthesis and approbation of new neuroprotective chemicals of pyrrolyl- and indolylazine classes in a cell model of Alzheimer's disease / E. A. Dutysheva, I. A. Utepova, M. A. Trestsova [et al.] // European journal of medicinal chemistry. - 2021. - Vol. 222. - P113577 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): PYRROLYLAZINES -- NEUROPROTECTORS -- CHAPERONES -- AMYLOID-BETA -- ALZHEIMER'S DISEASE Аннотация: One of the major causes of neurodegeneration in the pathogenesis of Alzheimer's disease is the accumulation of cytotoxic amyloid species within the intercellular compartments of the brain. The efficacy of the anti-proteotoxic mechanism based on the molecular chaperones Hsp70 and Hsp90 in numerous types of neurons is often low, while its pharmacological enhancement has been shown to ameliorate the physiological and cognitive functions of the brain. Suggesting that the chemicals able to induce heat shock protein synthesis and therefore rescue neural cells from cytotoxicity associated with amyloid, we have synthesized a group of pyrrolyl- and indolylazines that cause the accumulation of heat shock proteins, using a novel method of photocatalysis that is employed in green chemistry. The selected compounds were tested in a cell model of Alzheimer's disease and demonstrated a pronounced neuroprotective effect. These substances increased the survival of neurons, blocked the activation of β-galactosidase, and prevented apoptosis in neurons cultured in the presence of β-amyloid. |