N. V. Konoshchuk, O. P. Rozovik, V. G. Koshechko, V. D. Pokhodenko
{"title":"Effect of CsPbBr3 Content in Mechanochemically Obtained CsPbBr3/h-BN Nanocomposites on Their Photoluminescent Characteristics","authors":"N. V. Konoshchuk, O. P. Rozovik, V. G. Koshechko, V. D. Pokhodenko","doi":"10.1007/s11237-023-09755-8","DOIUrl":"10.1007/s11237-023-09755-8","url":null,"abstract":"<div><div><p>A number of CsPbBr<sub>3</sub>/h-BN nanocomposites with different contents of inorganic halide perovskite (IHP) nanoparticles, which are characterized by bright photoluminescence (PL) in the green region of the spectrum, were obtained by mechanochemical synthesis. It is shown that the use of a mechanochemical approach leads to a significant delamination of boron nitride (both at the stage of preliminary grinding of h-BN with cesium bromide and in the process of mechanochemical production of nanocomposites), the degree of which decreases in the range of CsBr/h-BN = 1:10 > 1 :50 > 1:100 > 1:250. The increase in the content of boron nitride in the reaction mixture during the mechanochemical synthesis of CsPbBr<sub>3</sub>/h-BN nanocomposite contributes to a reduction of the size of the formed perovskite nanoparticles leading to a significant increase in the PL intensity (<i>I</i><sub>PL</sub>). Optimal content of IHP in the synthesized nanocomposites (~25 wt.%) for obtaining the material with the highest PL intensity has been estimated from the extreme dependence between the <i>I</i><sub>PL</sub> value of CsPbBr<sub>3</sub>/h-BN nanocomposites and their CsPbBr<sub>3</sub> content.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"58 6","pages":"402 - 408"},"PeriodicalIF":1.0,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5179040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. M. Orlyk, V. I. Chedryk, S. O. Soloviev, O. D. Vasylyev
{"title":"Catalytic Properties and Resource Characteristics of Modified Nickel Composites in the Processes of Oxidative Reforming of C1-C4 Alkanes","authors":"S. M. Orlyk, V. I. Chedryk, S. O. Soloviev, O. D. Vasylyev","doi":"10.1007/s11237-023-09751-y","DOIUrl":"10.1007/s11237-023-09751-y","url":null,"abstract":"<div><div><p>Modified nickel composites based on stabilized zirconia as prototypes of anode materials of solid oxide fuel cells (SOFC) showed high catalytic activity and stability in the oxidative reforming of alkanes (tri-reforming of methane and steam-(oxygen) reforming of butane). Modification of Ni-10Sc1CeSZ composite with Cu and CeO<sub>2</sub> increases its resistance to carbonization, and doping with platinum or palladium (0.1 wt.%) increases the resistance to H<sub>2</sub>S poisoning. Structured Ni-(CeO<sub>2</sub>, La<sub>2</sub>O<sub>3</sub>)-Al<sub>2</sub>O<sub>3</sub>/cordierite catalysts are characterized by high activity and stability in the oxidative reforming of C<sub>1</sub>-C<sub>3</sub> alkanes into syngas and can be effective in an external processor integrated with SOFC. Bench tests of the fuel cell showed the achievement of acceptable electrical characteristics.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"58 5","pages":"350 - 362"},"PeriodicalIF":1.0,"publicationDate":"2023-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4853347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Correction to: Influence of Molecular and Electronic Structure of Ln3+ Complexes on the Occurrence of Monoionic Magnetism: A Review","authors":"A. V. Pavlishchuk, V. V. Pavlishchuk","doi":"10.1007/s11237-023-09753-w","DOIUrl":"10.1007/s11237-023-09753-w","url":null,"abstract":"","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"58 5","pages":"372 - 372"},"PeriodicalIF":1.0,"publicationDate":"2023-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4934486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. M. Sylenko, A. V. Pokropivny, D. I. Andrushchenko, Yu.M. Solonin
{"title":"Formation of Silicon Carbide Nanoclusters in the Process of Methyltrichlorosilane Oligomerization","authors":"P. M. Sylenko, A. V. Pokropivny, D. I. Andrushchenko, Yu.M. Solonin","doi":"10.1007/s11237-023-09749-6","DOIUrl":"10.1007/s11237-023-09749-6","url":null,"abstract":"<div><div><p>On the basis of quantum-chemical analysis, it has been shown that the formation of silicon carbide nanoclusters can occur due to the chemical reaction between two CH<sub>3</sub>SiCl<sub>3</sub> molecules on the first step of the process with the subsequent reaction between CH<sub>3</sub>SiCl<sub>3</sub> and the formed clusters, rather than due to the homolytic C–Si bond rupture in the CH<sub>3</sub>SiCl<sub>3</sub> molecule. Cases where a chlorine atom of a CH<sub>3</sub>SiCl<sub>3</sub> molecule interacts with one hydrogen atom of another CH<sub>3</sub>SiCl<sub>3</sub> molecule or cluster, and three chlorine atoms of a methyltrichlorosilane molecule form a three-center complex with three hydrogen atoms of a cluster have been considered. It is shown that the second case leads to the formation of SiC nanoparticles.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"58 5","pages":"336 - 341"},"PeriodicalIF":1.0,"publicationDate":"2023-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4604514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Clusteroluminescence in Organic, Inorganic, and Hybrid Systems: A Review","authors":"T. V. Sakhno, Yu.E. Sakhno, S. Ya. Kuchmiy","doi":"10.1007/s11237-023-09747-8","DOIUrl":"10.1007/s11237-023-09747-8","url":null,"abstract":"<div><div><p>The current research on clusteroluminescence of nonconventional luminescent materials, which is associated with the occurrence of through-space conjugation due to the overlapping of electronic orbitals of atoms in aggregates formed at high concentrations of substances in solutions or solid states, is considered. It is shown that this phenomenon is typical for a wide range of substances, in particular, various low molecular weight organic compounds, polymers containing heteroatoms, inorganic substances and some hybrid (composite) materials. The possible practical use of clusteroluminogens in versatile fields is demonstrated, especially ecosystem monitoring, encryption materials, optoelectronics, medical and biological applications.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"58 5","pages":"297 - 327"},"PeriodicalIF":1.0,"publicationDate":"2023-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4603402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N. V. Konoshchuk, O. Yu. Posudievsky, O. P. Rozovik, V. G. Koshechko, V. D. Pokhodenko
{"title":"Structure and Optical Properties of Mechanochemically Obtained Nanocomposite CsPbBr3/h-BN","authors":"N. V. Konoshchuk, O. Yu. Posudievsky, O. P. Rozovik, V. G. Koshechko, V. D. Pokhodenko","doi":"10.1007/s11237-023-09748-7","DOIUrl":"10.1007/s11237-023-09748-7","url":null,"abstract":"<div><div><p>For the first time, the possibility of a CsPbBr<sub>3</sub>/h-BN nanocomposite preparing by a mechanochemical treatment of a dry mixture of PbBr<sub>2</sub> and a hexagonal boron nitride delaminated with cesium bromide has been demonstrated. X-ray diffraction and electron microscopy studies show that the use of this method leads to the formation of crystalline CsPbBr<sub>3</sub> nanosheets. Unlike to the mechanochemically synthesized individual CsPbBr<sub>3</sub>, the CsPbBr<sub>3</sub>/h-BN nanocomposite is characterized by bright green luminescence. The nanocomposite has enhanced resistance to air moisture and sunlight due to the presence of a hydrophobic thermally conductive layers of boron nitride.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"58 5","pages":"328 - 335"},"PeriodicalIF":1.0,"publicationDate":"2023-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4607257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. V. Kharchenko, V. S. Farafonov, T. A. Cheipesh, N. O. Mchedlov-Petrossyan, R. V. Rodik, V. I. Kalchenko
{"title":"Catalytic Properties of Calixarene Bearing Choline Groups in the Processes of Ester Hydrolysis","authors":"D. V. Kharchenko, V. S. Farafonov, T. A. Cheipesh, N. O. Mchedlov-Petrossyan, R. V. Rodik, V. I. Kalchenko","doi":"10.1007/s11237-023-09752-x","DOIUrl":"10.1007/s11237-023-09752-x","url":null,"abstract":"<div><div><p>The study of catalytic properties of calix[4]arene with choline groups has shown a significant increase in the initial rate of a hydrolysis reaction of 4-nitrophenyl acetate and 4-nitrophenyl palmitate in aqueous borate buffer solutions. The acceleration for 4-nitrophenol ester reaches 200 times and exceeds the effect of cationic surfactants cetyltrimethylammonium bromide and N-cetylpyridinium chloride more than an order of magnitude. The structure of calixarene aggregates in solutions and the nature of their influence on the rate of hydrolysis reactions have been analyzed.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"58 5","pages":"363 - 371"},"PeriodicalIF":1.0,"publicationDate":"2023-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4602728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. O. Soloviev, G. R. Kosmambetova, P. I. Kyriienko, D. E. Samoilenko, Y. P. Kurylets
{"title":"Influence of Pd and Rare Earth Metals Oxides (Ce, La) as Modifying Additives in the Co,Ni-Oxide Catalyst Compositions on the Process of Methane Oxidation","authors":"S. O. Soloviev, G. R. Kosmambetova, P. I. Kyriienko, D. E. Samoilenko, Y. P. Kurylets","doi":"10.1007/s11237-023-09750-z","DOIUrl":"10.1007/s11237-023-09750-z","url":null,"abstract":"<div><div><p>NiO-Al<sub>2</sub>O<sub>3</sub> and Co<sub>3</sub>O<sub>4</sub> oxide catalysts modified with palladium and oxides of rare earth metals (Ce and La) and formed on structured cordierite supports have been studied in the process of methane oxidation at different O<sub>2</sub>/CH<sub>4</sub> ratios. It is shown that methane oxidation proceeds without the formation of CO even at an O<sub>2</sub>/CH<sub>4</sub> ratio of < 2 (in contrast to nickel-containing catalysts) in the presence of cobalt-containing catalysts modified with cerium and lanthanum oxides. The addition of CeO<sub>2</sub> promotes Co<sub>3</sub>O<sub>4</sub> dispersion, increases the number of oxygen vacancies, and prevents agglomeration of the active phase of the catalyst at high temperatures. The modification of Co<sub>3</sub>O<sub>4</sub>-CeO<sub>2</sub>/cordierite with palladium (0.1%) enhances its activity due to increased surface oxygen mobility as a result of the interphase interaction of palladium with cobalt oxides and ceria (according to the TPR-H<sub>2</sub> and XPS data).</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"58 5","pages":"342 - 349"},"PeriodicalIF":1.0,"publicationDate":"2023-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4605709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Layered Double Hydroxides as Promising Adsorbents for Purification of Radioactive Polluted Water: A Review","authors":"N. G. Kobylinska, L. M. Puzyrnaya, G. M. Pshinko","doi":"10.1007/s11237-022-09739-0","DOIUrl":"10.1007/s11237-022-09739-0","url":null,"abstract":"<div><div><p>A critical review of the last decade’s literature on the synthesis, modification, and properties of layered double hydroxides (LDHs) regarding their use as sorbents for the removal of radionuclides from aquatic environments has been conducted. The evaluation of their adsorption capacity against U(VI), <sup>137</sup>Cs, <sup>90</sup>Sr, <sup>60</sup>Co, <sup>152+154</sup>Eu(III), and <sup>241</sup>Am has been performed on the basis of the analysis of the effect of the LDH preparation method, the nature of the metal ions in the material layers and compounds intercalated into their interlayer space. It is shown that magnetic composites of LDHs chelated forms have significant advantages for a practical use for the removal of both cationic and, especially, anionic forms of uranium(VI) from aquatic environments. Zn,Al-LDHs intercalated with the inorganic compounds, namely hexacyanoferrate(II) anions and copper(II) hexacyanoferrate, are found to be the most effective for the sorption extraction of <sup>137</sup>Cs and <sup>90</sup>Sr radionuclides.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"58 4","pages":"221 - 239"},"PeriodicalIF":1.0,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4744045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Boumechhour, S. Benadji, T. Mazari, L. Dermeche, C. Rabia
{"title":"Influence of the Structure and Composition of H3–2xMnxPMo12O40 AND (NH4)3–2xMnxPMo12O40 Heteropolycompounds on their Catalytic Properties in the Process of Cyclohexanone Oxidation with Hydrogen Peroxide","authors":"A. Boumechhour, S. Benadji, T. Mazari, L. Dermeche, C. Rabia","doi":"10.1007/s11237-022-09745-2","DOIUrl":"10.1007/s11237-022-09745-2","url":null,"abstract":"<div><div><p>Catalytic properties of two series of Keggin-type heteropolycompounds, H<sub>3–2<i>x</i></sub>Mn<sub><i>x</i></sub>PMo<sub>12</sub>O<sub>40</sub> and (NH<sub>4</sub>)<sub>3–2<i>x</i></sub>Mn<sub><i>x</i></sub>PMo<sub>12</sub>O<sub>40</sub> (x = 0.25-1.5), have been studied in the process of oxidation of cyclohexanone and/or cyclohexanol to adipic acid, using 30% hydrogen peroxide, in the absence of organic solvent. The main products and by-products have been identified by means of GC-MS analysis. The highest yields of adipic acid are found in the case of H<sub>1.5</sub>Mn<sub>0.75</sub>PMo<sub>12</sub>O<sub>40</sub> and (NH<sub>4</sub>)<sub>2</sub>Mn<sub>0.5</sub>PMo<sub>12</sub>O<sub>40</sub> compounds.</p></div></div>","PeriodicalId":796,"journal":{"name":"Theoretical and Experimental Chemistry","volume":"58 4","pages":"276 - 289"},"PeriodicalIF":1.0,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4747986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}