Pub Date : 2024-07-01DOI: 10.1016/j.mencom.2024.06.003
Svetlana A. Novikova , Daria Yu. Voropaeva , Sergey A. Li , Tatiana L. Kulova , Alexander M. Skundin , Irina A. Stenina , Andrey B. Yaroslavtsev
In this work, a new cathode material for lithium–sulfur (Li–S) batteries was developed. Microporous carbon (with predominant pore size £1.2 nm) served as both a matrix for sulfur retention and conductive additive. Microporous carbon was shown to be capable of adsorbing lithium polysulfides thereby suppressing their migration toward lithium anode. The discharge capacity of the S/C composite at the 1st and 20th cycles in Li–S battery operation was 513 and 421 mAh g–1 at a scan rate of 0.1 mV s–1.
{"title":"Composite cathode material based on sulfur and microporous carbon for Li–S batteries","authors":"Svetlana A. Novikova , Daria Yu. Voropaeva , Sergey A. Li , Tatiana L. Kulova , Alexander M. Skundin , Irina A. Stenina , Andrey B. Yaroslavtsev","doi":"10.1016/j.mencom.2024.06.003","DOIUrl":"10.1016/j.mencom.2024.06.003","url":null,"abstract":"<div><p>In this work, a new cathode material for lithium–sulfur (Li–S) batteries was developed. Microporous carbon (with predominant pore size <em>£</em>1.2 nm) served as both a matrix for sulfur retention and conductive additive. Microporous carbon was shown to be capable of adsorbing lithium polysulfides thereby suppressing their migration toward lithium anode. The discharge capacity of the S/C composite at the 1st and 20th cycles in Li–S battery operation was 513 and 421 mAh g–1 at a scan rate of 0.1 mV s–1.</p></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 4","pages":"Pages 478-480"},"PeriodicalIF":1.8,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141952357","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}
The experimental results of luminescence measurements in Ca3Al2O6 : Tb showed single excitation wavelengths at 246 and 278 nm in the UV region. For the 278 nm excitation, six distinct emission peaks were found at 378, 419, 437, 447, 487 and 544 nm. Some spectroscopic parameters were calculated using CIE coordinates showing emission in the near-blue region, which may be useful for various display devices.
{"title":"Spectroscopic analysis of Tb3+ activated Ca3Al2O6 phosphor for display applications","authors":"K. Koteswara Rao , M.C. Rao , Vikas Dubey , K.V.R. Murthy","doi":"10.1016/j.mencom.2024.06.042","DOIUrl":"10.1016/j.mencom.2024.06.042","url":null,"abstract":"<div><p>The experimental results of luminescence measurements in Ca<sub>3</sub>Al<sub>2</sub>O<sub>6</sub> : Tb showed single excitation wavelengths at 246 and 278 nm in the UV region. For the 278 nm excitation, six distinct emission peaks were found at 378, 419, 437, 447, 487 and 544 nm. Some spectroscopic parameters were calculated using CIE coordinates showing emission in the near-blue region, which may be useful for various display devices.</p></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 4","pages":"Pages 598-600"},"PeriodicalIF":1.8,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141951845","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}
Pub Date : 2024-07-01DOI: 10.1016/j.mencom.2024.06.001
Igor D. Strelnik , Ilya E. Kolesnikov , Alexey A. Kalinichev , Tatiana P. Gerasimova , Kamil D. Akhmadgaleev , Irina R. Dayanova , Andrey A. Karasik
Transition metal complexes of copper subgroup metals are actively studied objects for temperature sensors. Their luminescence arising from the 3ILCT, 3MLCT or 3CC excited states is characterized by emission in all ranges of visible spectra and high quantum yields. Due to the ability of the complexes to emit in a dual band mode, these complexes are attractive for the temperature sensing in the ratiometric mode. Dual emission of complexes is usually susceptible of the irregular changes in intensity of two emission bands during the temperature changes. This is an important and necessary property for the utilization of phosphors as ratiometric thermometers. The structures and emission properties of gold(i) and copper(i) complexes are considered with the aim to demonstrate the possibility to apply such complexes as ratiometric molecular luminescent thermometers for the remote control of the object’s temperature.
{"title":"Is dual emission of copper subgroup d10-metal complexes a necessary and sufficient condition for ratiometric luminescence thermometry?","authors":"Igor D. Strelnik , Ilya E. Kolesnikov , Alexey A. Kalinichev , Tatiana P. Gerasimova , Kamil D. Akhmadgaleev , Irina R. Dayanova , Andrey A. Karasik","doi":"10.1016/j.mencom.2024.06.001","DOIUrl":"10.1016/j.mencom.2024.06.001","url":null,"abstract":"<div><p>Transition metal complexes of copper subgroup metals are actively studied objects for temperature sensors. Their luminescence arising from the <sup>3</sup>ILCT, <sup>3</sup>MLCT or <sup>3</sup>CC excited states is characterized by emission in all ranges of visible spectra and high quantum yields. Due to the ability of the complexes to emit in a dual band mode, these complexes are attractive for the temperature sensing in the ratiometric mode. Dual emission of complexes is usually susceptible of the irregular changes in intensity of two emission bands during the temperature changes. This is an important and necessary property for the utilization of phosphors as ratiometric thermometers. The structures and emission properties of gold(i) and copper(i) complexes are considered with the aim to demonstrate the possibility to apply such complexes as ratiometric molecular luminescent thermometers for the remote control of the object’s temperature.</p></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 4","pages":"Pages 457-471"},"PeriodicalIF":1.8,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141952381","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}
Pub Date : 2024-07-01DOI: 10.1016/j.mencom.2024.06.012
Anna A. Smirnova, Elena V. Tretyakova, Oxana B. Kazakova
The azido-Ugi reaction of methyl maleopimarate N-(2- aminoethyl) imide with isocyanides, paraformaldehyde and trimethylsilyl azide in one step leads to 1,5-disubstituted diterpene bis-tetrazoles. The compounds demonstrate selective cytotoxicity against NCI-60 cancer cell panel.
{"title":"Inhibiting the cancer cell growth by maleopimarate amino imide bis-tetrazoles synthesized via the azido-Ugi reaction","authors":"Anna A. Smirnova, Elena V. Tretyakova, Oxana B. Kazakova","doi":"10.1016/j.mencom.2024.06.012","DOIUrl":"10.1016/j.mencom.2024.06.012","url":null,"abstract":"<div><p>The azido-Ugi reaction of methyl maleopimarate <em>N</em>-(2- aminoethyl) imide with isocyanides, paraformaldehyde and trimethylsilyl azide in one step leads to 1,5-disubstituted diterpene bis-tetrazoles. The compounds demonstrate selective cytotoxicity against NCI-60 cancer cell panel.</p></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 4","pages":"Pages 509-510"},"PeriodicalIF":1.8,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141952352","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}
Pub Date : 2024-07-01DOI: 10.1016/j.mencom.2024.06.027
Kirill G. Pavlov , Dmitry A. Guk , Roman O. Burlutsky , Anna A. Moiseeva , Olga O. Krasnovskaya , Dmitry A. Lemenovskiy , Nikolay V. Zyk , Elena K. Beloglazkina
The copper-catalyzed azide–alkyne cycloaddition of BODIPY acetylene derivative and ferrocene azides in supercritical CO2 at 80 °C and 81 bar affords the corresponding triazole-containing BODIPY–ferrocene conjugates in high yields. The fluorescent and electrochemical properties of the compounds thus obtained were explored.
在 80 °C 和 81 bar 的超临界 CO2 条件下,铜催化叠氮-炔环化反应生成了相应的含三唑的 BODIPY-二茂铁共轭物。研究人员对由此获得的化合物的荧光和电化学特性进行了探讨。
{"title":"The Huisgen’s cycloaddition of BODIPY acetylene and ferrocene azides in supercritical CO2","authors":"Kirill G. Pavlov , Dmitry A. Guk , Roman O. Burlutsky , Anna A. Moiseeva , Olga O. Krasnovskaya , Dmitry A. Lemenovskiy , Nikolay V. Zyk , Elena K. Beloglazkina","doi":"10.1016/j.mencom.2024.06.027","DOIUrl":"10.1016/j.mencom.2024.06.027","url":null,"abstract":"<div><p>The copper-catalyzed azide–alkyne cycloaddition of BODIPY acetylene derivative and ferrocene azides in supercritical CO<sub>2</sub> at 80 °C and 81 bar affords the corresponding triazole-containing BODIPY–ferrocene conjugates in high yields. The fluorescent and electrochemical properties of the compounds thus obtained were explored.</p></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 4","pages":"Pages 552-554"},"PeriodicalIF":1.8,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141953057","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}
Pub Date : 2024-07-01DOI: 10.1016/j.mencom.2024.06.028
Nikolai S. Bushkov , Andrey V. Rumyantsev , Anton A. Zhizhin , Ivan A. Godovikov , Pavel A. Zhizhko , Dmitry N. Zarubin
Well-defined silica-supported Ti imido complex (SiO)Ti(NBut)(Me2Pyr)(Py)2 (Me2Pyr = 2,5-dimethyl- pyrrolyl) catalyzes condensation of N-sulfinylanilines into sulfurdiimines via the oxo/imido heterometathesis providing a convenient synthetic route to functionalized sulfurdiimines.
定义明确的二氧化硅支撑 Ti 亚氨基配合物 (SiO)Ti(NBut)(Me2Pyr)(Py)2 (Me2Pyr = 2,5 二甲基吡咯基)通过氧化/亚氨基异构反应催化 N-亚磺酰苯胺缩合成硫代二亚胺,为功能化硫代二亚胺提供了一条便捷的合成路线。
{"title":"Ti-catalyzed heterometathetical condensation of N-sulfinylamines into sulfurdiimines","authors":"Nikolai S. Bushkov , Andrey V. Rumyantsev , Anton A. Zhizhin , Ivan A. Godovikov , Pavel A. Zhizhko , Dmitry N. Zarubin","doi":"10.1016/j.mencom.2024.06.028","DOIUrl":"10.1016/j.mencom.2024.06.028","url":null,"abstract":"<div><p>Well-defined silica-supported Ti imido complex (<img>SiO)Ti(<img>NBu<sup>t</sup>)(Me<sub>2</sub>Pyr)(Py)<sub>2</sub> (Me<sub>2</sub>Pyr = 2,5-dimethyl- pyrrolyl) catalyzes condensation of <em>N</em>-sulfinylanilines into sulfurdiimines <em>via</em> the oxo/imido heterometathesis providing a convenient synthetic route to functionalized sulfurdiimines.</p></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 4","pages":"Pages 555-557"},"PeriodicalIF":1.8,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141953514","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}
Pub Date : 2024-07-01DOI: 10.1016/j.mencom.2024.06.039
Elena V. Shuvalova, Olga A. Kirichenko
Catalysts of 1% Pd/TiO2 type were prepared via the deposition–precipitation of Pd polyhydroxo complexes followed by reduction with hydrogen at 23 °C. These catalysts were found to be active for the selective hydrogenation of m-dinitrobenzene into m-phenylenediamine at 25–50 °C and 0.5 MPa H2 in a batch reactor.
通过沉积-沉淀钯多羟基络合物,然后在 23 °C 下用氢气还原,制备了 1% Pd/TiO2 型催化剂。在间歇式反应器中,在 25-50 °C 和 0.5 兆帕 H2 条件下,这些催化剂对于间二硝基苯选择性氢化成间苯二胺具有活性。
{"title":"Hydrogenation of dinitrobenzenes over titania-supported palladium nanoparticles","authors":"Elena V. Shuvalova, Olga A. Kirichenko","doi":"10.1016/j.mencom.2024.06.039","DOIUrl":"10.1016/j.mencom.2024.06.039","url":null,"abstract":"<div><p>Catalysts of 1% Pd/TiO<sub>2</sub> type were prepared <em>via</em> the deposition–precipitation of Pd polyhydroxo complexes followed by reduction with hydrogen at 23 °C. These catalysts were found to be active for the selective hydrogenation of <em>m-</em>dinitrobenzene into <em>m</em>-phenylenediamine at 25–50 °C and 0.5 MPa H<sub>2</sub> in a batch reactor.</p></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 4","pages":"Pages 587-590"},"PeriodicalIF":1.8,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141960179","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}
Methyl dihydrojasmonate and methyl (5-methylidene-4-oxocyclopent-2-en-1-yl)acetate were synthesized from 4-hydroxy-2-(hydroxymethyl)cyclopentenone, which, in turn, was obtained from D-glucose. The conditions for the key step, the Johnson–Claisen rearrangement, were optimized to get the maximum yield of the intermediate methyl 2-[2-methylene-3-oxo-5-(triisopropylsilyloxy)-cyclopentyl]acetate.
{"title":"A concise synthesis of methyl dihydrojasmonate and methyl (5-methylidene-4-oxocyclopent-2-en-1-yl)acetate from D-glucose","authors":"Sanjay Kumar , Yoshitaka Koseki , Takaaki Kamishima , Hitoshi Kasai","doi":"10.1016/j.mencom.2024.06.019","DOIUrl":"10.1016/j.mencom.2024.06.019","url":null,"abstract":"<div><p>Methyl dihydrojasmonate and methyl (5-methylidene-4-oxocyclopent-2-en-1-yl)acetate were synthesized from 4-hydroxy-2-(hydroxymethyl)cyclopentenone, which, in turn, was obtained from D-glucose. The conditions for the key step, the Johnson–Claisen rearrangement, were optimized to get the maximum yield of the intermediate methyl 2-[2-methylene-3-oxo-5-(triisopropylsilyloxy)-cyclopentyl]acetate.</p></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 4","pages":"Pages 528-530"},"PeriodicalIF":1.8,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141962801","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}
Pub Date : 2024-07-01DOI: 10.1016/j.mencom.2024.06.017
Andrey A. Chudin, Elena V. Kudryashova
The enhancing effect of natural flavonoids, quercetin and dihydroquercetin, on the catalytic activity of galactonolactone oxidase from Trypanosoma cruzi has been established.
天然类黄酮--槲皮素和双氢槲皮素--对克氏锥虫半乳糖内酯氧化酶催化活性的增强作用已经得到证实。
{"title":"Quercetin and dihydroquercetin are the activators of galactonolactone oxidase from Trypanosoma cruzi","authors":"Andrey A. Chudin, Elena V. Kudryashova","doi":"10.1016/j.mencom.2024.06.017","DOIUrl":"10.1016/j.mencom.2024.06.017","url":null,"abstract":"<div><p>The enhancing effect of natural flavonoids, quercetin and dihydroquercetin, on the catalytic activity of galactonolactone oxidase from <em>Trypanosoma cruzi</em> has been established.</p></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 4","pages":"Pages 523-524"},"PeriodicalIF":1.8,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141963707","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}
Pub Date : 2024-07-01DOI: 10.1016/j.mencom.2024.06.008
Tat’yana F. Savel’yeva, Zalina T. Gugkaeva, Yulia V. Nelyubina, Alexander F. Smol’yakov, Margarita A. Moskalenko, Vladimir A. Larionov, Victor I. Maleev
New asymmetric metal-templated synthesis of enantiomers of (2S)- and (2R)-2-(3-[19F]fluoropropyl)tyrosine precursors were obtained based on a chiral NiII complex of the Schiff base derived from (S)-2-[N-(N’-benzylprolyl)amino]-benzaldehyde and racemic tyrosine in five steps. The free tyrosine derivatives which can be obtained upon decomplexation seem promising radiotracers for positron emission tomography imaging provided the introduction of 18F isotope.
{"title":"A metal-templated synthesis of precursors for (2S)- and (2R)-2-(3-[18F]fluoropropyl)tyrosines as potential radiotracers for positron emission tomography","authors":"Tat’yana F. Savel’yeva, Zalina T. Gugkaeva, Yulia V. Nelyubina, Alexander F. Smol’yakov, Margarita A. Moskalenko, Vladimir A. Larionov, Victor I. Maleev","doi":"10.1016/j.mencom.2024.06.008","DOIUrl":"10.1016/j.mencom.2024.06.008","url":null,"abstract":"<div><p>New asymmetric metal-templated synthesis of enantiomers of (2<em>S</em>)- and (2<em>R</em>)-2-(3-[<sup>19</sup>F]fluoropropyl)tyrosine precursors were obtained based on a chiral Ni<sup>II</sup> complex of the Schiff base derived from (<em>S</em>)-2-[<em>N</em>-(<em>N’</em>-benzylprolyl)amino]-benzaldehyde and racemic tyrosine in five steps. The free tyrosine derivatives which can be obtained upon decomplexation seem promising radiotracers for positron emission tomography imaging provided the introduction of <sup>18</sup>F isotope.</p></div>","PeriodicalId":18542,"journal":{"name":"Mendeleev Communications","volume":"34 4","pages":"Pages 496-498"},"PeriodicalIF":1.8,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141952354","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}