首页 > 最新文献

Russian Journal of Inorganic Chemistry最新文献

英文 中文
Structural Organization and Thermal Behavior of Compounds Rb3(SbF3)(Zr2F11)·0.5H2O and Rb3(SbF3)(Zr2F11) Rb3(SbF3)(Zr2F11)-0.5H2O 和 Rb3(SbF3)(Zr2F11) 化合物的结构组织和热行为
IF 2.1 3区 化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2024-09-15 DOI: 10.1134/s0036023624601648
A. V. Gerasimenko, T. F. Antokhina, N. N. Savchenko

Abstract

Compound Rb3(SbF3)(Zr2F11)·0.5H2O and its dehydration product Rb3(SbF3)(Zr2F11) were synthesized and their structures were studied. It was found that compound Rb3(SbF3)(Zr2F11)·0.5H2O has a unique fluoride zirconate framework structure built of ring tetrameric fragments (Zr4F24) connected to each other at the vertices by bridging fluorine atoms. Inside the tetrameric fragments, ZrF8 polyhedra are connected to each other along common edges. The zirconium framework [Zr2F11]3– is bound by Zr–F–Sb fluoride bridges from the second coordination sphere of antimony atoms. The structure of the dehydrated compound Rb3(SbF3)(Zr2F11) is a three-dimensional framework consisting of infinite chains of composition [Zr2F11]3–. The chains are formed by ZrF7 polyhedra connected along edges and vertices and united with each other into a three-dimensional framework by fluoride bridges Zr–F–Sb from the second coordination sphere of antimony atoms. In Rb3(SbF3)(Zr2F11), in the temperature range 247–256 K, a reversible phase transition occurs from the partially disordered high-temperature phase α to the ordered low-temperature phase β. With the participation of fluorine atoms of the second coordination sphere and a lone pair of electrons around antimony atoms, coordination polyhedra are formed in the structures in the form of distorted (SbEF5) and single-capped (SbEF6) octahedra.

摘要 合成了化合物Rb3(SbF3)(Zr2F11)-0.5H2O及其脱水产物Rb3(SbF3)(Zr2F11),并研究了它们的结构。研究发现,Rb3(SbF3)(Zr2F11)-0.5H2O 化合物具有独特的氟锆酸盐框架结构,该结构由环状四聚体片段 (Zr4F24) 构建而成,这些片段的顶点通过氟原子桥连接在一起。在四聚体片段内部,ZrF8 多面体沿着公共边缘相互连接。锆框架 [Zr2F11]3- 由来自锑原子第二配位层的 Zr-F-Sb 氟化桥结合。脱水化合物 Rb3(SbF3)(Zr2F11)的结构是由[Zr2F11]3-无限链组成的三维框架。这些链由沿边缘和顶点连接的 ZrF7 多面体组成,并通过来自锑原子第二配位层的氟桥 Zr-F-Sb 相互连接成一个三维框架。在 Rb3(SbF3)(Zr2F11)中,在 247-256 K 的温度范围内,会发生从部分无序的高温相 α 到有序的低温相 β 的可逆相变。由于第二配位层中氟原子的参与和锑原子周围孤对电子的存在,配位多面体以扭曲(SbEF5)和单帽(SbEF6)八面体的形式在结构中形成。
{"title":"Structural Organization and Thermal Behavior of Compounds Rb3(SbF3)(Zr2F11)·0.5H2O and Rb3(SbF3)(Zr2F11)","authors":"A. V. Gerasimenko, T. F. Antokhina, N. N. Savchenko","doi":"10.1134/s0036023624601648","DOIUrl":"https://doi.org/10.1134/s0036023624601648","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Compound Rb<sub>3</sub>(SbF<sub>3</sub>)(Zr<sub>2</sub>F<sub>11</sub>)·0.5H<sub>2</sub>O and its dehydration product Rb<sub>3</sub>(SbF<sub>3</sub>)(Zr<sub>2</sub>F<sub>11</sub>) were synthesized and their structures were studied. It was found that compound Rb<sub>3</sub>(SbF<sub>3</sub>)(Zr<sub>2</sub>F<sub>11</sub>)·0.5H<sub>2</sub>O has a unique fluoride zirconate framework structure built of ring tetrameric fragments (Zr<sub>4</sub>F<sub>24</sub>) connected to each other at the vertices by bridging fluorine atoms. Inside the tetrameric fragments, ZrF<sub>8</sub> polyhedra are connected to each other along common edges. The zirconium framework [Zr<sub>2</sub>F<sub>11</sub>]<sup>3–</sup> is bound by Zr–F–Sb fluoride bridges from the second coordination sphere of antimony atoms. The structure of the dehydrated compound Rb<sub>3</sub>(SbF<sub>3</sub>)(Zr<sub>2</sub>F<sub>11</sub>) is a three-dimensional framework consisting of infinite chains of composition [Zr<sub>2</sub>F<sub>11</sub>]<sup>3–</sup>. The chains are formed by ZrF<sub>7</sub> polyhedra connected along edges and vertices and united with each other into a three-dimensional framework by fluoride bridges Zr–F–Sb from the second coordination sphere of antimony atoms. In Rb<sub>3</sub>(SbF<sub>3</sub>)(Zr<sub>2</sub>F<sub>11</sub>), in the temperature range 247–256 K, a reversible phase transition occurs from the partially disordered high-temperature phase α to the ordered low-temperature phase β. With the participation of fluorine atoms of the second coordination sphere and a lone pair of electrons around antimony atoms, coordination polyhedra are formed in the structures in the form of distorted (SbEF<sub>5</sub>) and single-capped (SbEF<sub>6</sub>) octahedra.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142251747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis and Thermodynamic Study of CaYb2Ge4O12 and CaLu2Ge4O12 Germanates in the Range 320–1050 K 320-1050 K 范围内 CaYb2Ge4O12 和 CaLu2Ge4O12 锗酸盐的合成与热力学研究
IF 2.1 3区 化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2024-09-15 DOI: 10.1134/s0036023624601958
L. T. Denisova, D. V. Belokopytova, Yu. F. Kargin, G. V. Vasil’ev, N. V. Belousova, V. M. Denisov

Abstract

Germanates CaYb2Ge4O12 and CaLu2Ge4O12 have been prepared via firing the solid precursor oxides CaO, Yb2O3 (Lu2O3), and GeO2 in air at 1223–1423 K. The X-ray diffraction crystal structures of the prepared germanates have been determined. The high-temperature heat capacity in the range 320–1050 K has been measured by differential scanning calorimetry (DSC). The measured heat capacities are well fitted by the Maier–Kelley equation: Cp(CaYb2Ge4O12) = (left( {{{416}}{{.4; pm ;0}}{{.40}}} right) + left( {{{72}}{{.67; pm ;2}}{{.30}}} right){{ times 1}}{{{{0}}}^{{{{-3}}}}}T - left( {{{50}}{{.13; pm ;0}}{{.19}}} right){{ times 1}}{{{{0}}}^{{{5}}}}{{T}^{{{{-2}}}}}), and Cp(CaLu2Ge4O12) = (left( {{{450}}{{.0; pm ;1}}{{.75}}} right) + left( {{{15}}{{.46; pm ;1}}{{.90}}} right){{ times 1}}{{{{0}}}^{{{{-3}}}}}T - left( {{{78}}{{.67; pm ;1}}{{.60}}} right){{ times 1}}{{{{0}}}^{{{5}}}}{{T}^{{{{-2}}}}}). These results have been used to calculate selected thermodynamic properties of the prepared germanates.

摘要 通过在 1223-1423 K 的空气中焙烧固体前体氧化物 CaO、Yb2O3 (Lu2O3) 和 GeO2,制备了锗酸盐 CaYb2Ge4O12 和 CaLu2Ge4O12。通过差示扫描量热法(DSC)测量了 320-1050 K 范围内的高温热容量。测得的热容量与 Maier-Kelley 方程十分吻合:Cp(CaYb2Ge4O12) = left( {{{416}}{{.4; pm ;0}}{{.40}} right) + left( {{{72}}{{.67; pm ;2}}{{.30}} right){{ times 1}}{{{{0}}^{{{{-3}}}}}T - left( {{{50}}{{.13; pm ;0}}{{.19}}} right){{ times 1}}{{{{0}}}^{{5}}}}{{T}^{{{{-2}}}}}), and Cp(CaLu2Ge4O12) =(left( {{450}}{.0; pm ;1}}{{.75}} right) + left( {{{15}}{{.46; pm ;1}}{{.90}} right){{ times 1}{{{{0}}}^{{{{-3}}}}}T - left( {{{78}}{.67; pm;1}}{{.60}} right){{ times 1}}{{{{0}}}^{{5}}}}{T}^{{{{-2}}}}}).这些结果被用来计算所制备的锗酸盐的部分热力学性质。
{"title":"Synthesis and Thermodynamic Study of CaYb2Ge4O12 and CaLu2Ge4O12 Germanates in the Range 320–1050 K","authors":"L. T. Denisova, D. V. Belokopytova, Yu. F. Kargin, G. V. Vasil’ev, N. V. Belousova, V. M. Denisov","doi":"10.1134/s0036023624601958","DOIUrl":"https://doi.org/10.1134/s0036023624601958","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Germanates CaYb<sub>2</sub>Ge<sub>4</sub>O<sub>12</sub> and CaLu<sub>2</sub>Ge<sub>4</sub>O<sub>12</sub> have been prepared via firing the solid precursor oxides CaO, Yb<sub>2</sub>O<sub>3</sub> (Lu<sub>2</sub>O<sub>3</sub>), and GeO<sub>2</sub> in air at 1223–1423 K. The X-ray diffraction crystal structures of the prepared germanates have been determined. The high-temperature heat capacity in the range 320–1050 K has been measured by differential scanning calorimetry (DSC). The measured heat capacities are well fitted by the Maier–Kelley equation: <i>C</i><sub><i>p</i></sub>(CaYb<sub>2</sub>Ge<sub>4</sub>O<sub>12</sub>) = <span>(left( {{{416}}{{.4; pm ;0}}{{.40}}} right) + left( {{{72}}{{.67; pm ;2}}{{.30}}} right){{ times 1}}{{{{0}}}^{{{{-3}}}}}T - left( {{{50}}{{.13; pm ;0}}{{.19}}} right){{ times 1}}{{{{0}}}^{{{5}}}}{{T}^{{{{-2}}}}})</span>, and <i>C</i><sub><i>p</i></sub>(CaLu<sub>2</sub>Ge<sub>4</sub>O<sub>12</sub>) = <span>(left( {{{450}}{{.0; pm ;1}}{{.75}}} right) + left( {{{15}}{{.46; pm ;1}}{{.90}}} right){{ times 1}}{{{{0}}}^{{{{-3}}}}}T - left( {{{78}}{{.67; pm ;1}}{{.60}}} right){{ times 1}}{{{{0}}}^{{{5}}}}{{T}^{{{{-2}}}}})</span>. These results have been used to calculate selected thermodynamic properties of the prepared germanates.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142251749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
New Double Complex Salts [M(im)n][RuNOCl5] (M = Ni, Cu): Synthesis, Structure, and Thermal Properties 新型双络合盐 [M(im)n][RuNOCl5](M = Ni、Cu):合成、结构和热性能
IF 2.1 3区 化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2024-09-15 DOI: 10.1134/s003602362470058x
A. O. Borodin, E. Yu. Filatov, P. E. Plusnin, N. V. Kuratieva, S. V. Korenev, G. A. Kostin

Abstract

Procedures for the synthesis of new double complex salts [Cu(im)4][RuNOCl5], [Ni(im)6][RuNOCl5]·H2O, and p-[Ni(im)4(DMF)2][RuNOCl5] have been developed and their crystal structure have been determined. Thermal properties of the synthesized DCS have been studied under inert and reducing atmospheres using synchronous TG–DTA and ex situ XRD of intermediate and final thermolysis products. It has been found that thermal decomposition occurs in three stages. Thermolysis of [Cu(im)4][RuNOCl5] under inert and reducing atmospheres gives rise to the mixture of copper and ruthenium, while the thermal decomposition of [Ni(im)6][RuNOCl5]·H2O under an inert atmosphere results in a mixture of nickel and ruthenium. A supersaturated Ni0.27Ru0.73 solid solution can be obtained in the nickel-ruthenium system upon thermolysis under a reducing atmosphere at temperature up to 400°C. Increase in thermolysis temperature up to 800°C leads to the partial decomposition of the solid solution.

摘要 开发了合成新的双络合盐[Cu(im)4][RuNOCl5]、[Ni(im)6][RuNOCl5]-H2O 和 p-[Ni(im)4(DMF)2][RuNOCl5] 的方法,并确定了它们的晶体结构。利用同步 TG-DTA 和中间及最终热解产物的原位 XRD 研究了合成的 DCS 在惰性和还原气氛下的热性质。研究发现,热分解分为三个阶段。在惰性和还原气氛下,[Cu(im)4][RuNOCl5]的热分解产生铜和钌的混合物,而在惰性气氛下,[Ni(im)6][RuNOCl5]-H2O 的热分解产生镍和钌的混合物。镍-钌体系在还原气氛下进行热分解,温度最高可达 400°C,可得到过饱和的 Ni0.27Ru0.73 固溶体。热解温度升高至 800°C 会导致固溶体部分分解。
{"title":"New Double Complex Salts [M(im)n][RuNOCl5] (M = Ni, Cu): Synthesis, Structure, and Thermal Properties","authors":"A. O. Borodin, E. Yu. Filatov, P. E. Plusnin, N. V. Kuratieva, S. V. Korenev, G. A. Kostin","doi":"10.1134/s003602362470058x","DOIUrl":"https://doi.org/10.1134/s003602362470058x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Procedures for the synthesis of new double complex salts [Cu(im)<sub>4</sub>][RuNOCl<sub>5</sub>], [Ni(im)<sub>6</sub>][RuNOCl<sub>5</sub>]·H<sub>2</sub>O, and <i>p</i>-[Ni(im)<sub>4</sub>(DMF)<sub>2</sub>][RuNOCl<sub>5</sub>] have been developed and their crystal structure have been determined. Thermal properties of the synthesized DCS have been studied under inert and reducing atmospheres using synchronous TG–DTA and ex situ XRD of intermediate and final thermolysis products. It has been found that thermal decomposition occurs in three stages. Thermolysis of [Cu(im)<sub>4</sub>][RuNOCl<sub>5</sub>] under inert and reducing atmospheres gives rise to the mixture of copper and ruthenium, while the thermal decomposition of [Ni(im)<sub>6</sub>][RuNOCl<sub>5</sub>]·H<sub>2</sub>O under an inert atmosphere results in a mixture of nickel and ruthenium. A supersaturated Ni<sub>0.27</sub>Ru<sub>0.73</sub> solid solution can be obtained in the nickel-ruthenium system upon thermolysis under a reducing atmosphere at temperature up to 400°C. Increase in thermolysis temperature up to 800°C leads to the partial decomposition of the solid solution.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142251744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Polyol Synthesis of Silver Nanowires and Their Application for Transparent Electrode Fabrication 多元醇合成银纳米线及其在透明电极制造中的应用
IF 2.1 3区 化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2024-09-15 DOI: 10.1134/s0036023624601697
N. P. Simonenko, T. L. Simonenko, Ph. Yu. Gorobtsov, P. V. Arsenov, I. A. Volkov, E. P. Simonenko

Abstract

Polyol synthesis of thin silver nanowires has been studied and their suitability for the formation of transparent electrodes has been shown. The influence of stepwise heating of the reaction system on the position and shape of the absorption band associated with the surface plasmon resonance of the formed silver nanostructures has been determined. Using X-ray powder diffraction analysis, it has been found that the material does not contain crystalline impurities and has a face-centered cubic lattice. According to the scanning and transmission electron microscopy data, the main fraction is represented by elongated nanostructures with 10–15 μm length (however, there are also structures with length up to 20 μm) characteristic for silver nanowires of the arc-shaped type. It is shown that the Ag nanowires obtained are quite thin (diameter is about 35–45 nm). In addition, some amount of microrods of 1–3 µm length is observed in the composition of the material, the diameter of which grows from 70 to 150 nm with decreasing length. In smaller quantities there is also an admixture of zero-dimensional particles, which are polyhedrons of various complexity. Atomic force microscopy has been used to study the surface of the film based on the obtained silver nanowires and the diameter of individual nanowire has been estimated. The optical properties and surface resistivity of the films based on the obtained silver nanowires have been examined. It has been found that the increase in transmittance at 550 nm from 73.9 to 90.3% is accompanied by an increase in the resistance value from 25 to 146 Ω/sq.

摘要 研究了薄银纳米线的多元醇合成,并证明了它们在形成透明电极方面的适用性。研究确定了反应体系逐步加热对与所形成的银纳米结构的表面等离子共振有关的吸收带的位置和形状的影响。通过 X 射线粉末衍射分析发现,该材料不含结晶杂质,具有面心立方晶格。根据扫描和透射电子显微镜数据,主要部分是长度为 10-15 μm 的细长纳米结构(但也有长度达 20 μm 的结构),具有弧形银纳米线的特征。结果表明,获得的银纳米线非常细(直径约为 35-45 纳米)。此外,在材料成分中还观察到一些长度为 1-3 µm 的微晶,其直径随着长度的减小从 70 纳米到 150 纳米不等。此外,还有少量的零维颗粒,它们是各种复杂程度的多面体。我们使用原子力显微镜研究了以获得的银纳米线为基础的薄膜表面,并估算了单根纳米线的直径。研究了基于所获得的银纳米线的薄膜的光学特性和表面电阻率。研究发现,在 550 纳米波长处的透射率从 73.9% 增加到 90.3%,同时电阻值也从 25Ω/sq 增加到 146Ω/sq。
{"title":"Polyol Synthesis of Silver Nanowires and Their Application for Transparent Electrode Fabrication","authors":"N. P. Simonenko, T. L. Simonenko, Ph. Yu. Gorobtsov, P. V. Arsenov, I. A. Volkov, E. P. Simonenko","doi":"10.1134/s0036023624601697","DOIUrl":"https://doi.org/10.1134/s0036023624601697","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Polyol synthesis of thin silver nanowires has been studied and their suitability for the formation of transparent electrodes has been shown. The influence of stepwise heating of the reaction system on the position and shape of the absorption band associated with the surface plasmon resonance of the formed silver nanostructures has been determined. Using X-ray powder diffraction analysis, it has been found that the material does not contain crystalline impurities and has a face-centered cubic lattice. According to the scanning and transmission electron microscopy data, the main fraction is represented by elongated nanostructures with 10–15 μm length (however, there are also structures with length up to 20 μm) characteristic for silver nanowires of the arc-shaped type. It is shown that the Ag nanowires obtained are quite thin (diameter is about 35–45 nm). In addition, some amount of microrods of 1–3 µm length is observed in the composition of the material, the diameter of which grows from 70 to 150 nm with decreasing length. In smaller quantities there is also an admixture of zero-dimensional particles, which are polyhedrons of various complexity. Atomic force microscopy has been used to study the surface of the film based on the obtained silver nanowires and the diameter of individual nanowire has been estimated. The optical properties and surface resistivity of the films based on the obtained silver nanowires have been examined. It has been found that the increase in transmittance at 550 nm from 73.9 to 90.3% is accompanied by an increase in the resistance value from 25 to 146 Ω/sq.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142251745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spin Properties of Chiral SiC Nanotubes 手性碳化硅纳米管的自旋特性
IF 2.1 3区 化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2024-09-15 DOI: 10.1134/s0036023624700566
P. N. D’yachkov, P. A. Kulyamin

Abstract

The band structure of single-walled SiC (n1, n2) nanotubes (n1 = 7, 0 ≤ n2 ≤ 7) as a function of spin and chirality has been calculated by the relativistic augmented cylindrical wave method. It has been found that the nanotubes are wide-band semiconductors with Eg ranging from 2.26 to 3.15 eV, and the spin–orbit splitting of the valence and conduction band edges are in the range 0.05–3.5 meV. The spin–orbit gap energies in righthanded and lefthanded enantiomers coincide, but the spins are opposite. Chiral nanotubes most suitable for selective spin transport with potentially high fluxes of α- and β-electrons in opposite directions have been determined.

摘要 利用相对论增强圆柱波方法计算了单壁碳化硅(n1,n2)纳米管(n1 = 7,0 ≤ n2 ≤ 7)的能带结构与自旋和手性的关系。结果发现,纳米管是宽禁带半导体,Eg 在 2.26 至 3.15 eV 之间,价带和导带边缘的自旋轨道分裂在 0.05 至 3.5 meV 之间。右旋和左旋对映体的自旋轨道间隙能量相同,但自旋相反。我们已经确定了最适合选择性自旋传输的手性纳米管,其α电子和β电子的通量可能会很高。
{"title":"Spin Properties of Chiral SiC Nanotubes","authors":"P. N. D’yachkov, P. A. Kulyamin","doi":"10.1134/s0036023624700566","DOIUrl":"https://doi.org/10.1134/s0036023624700566","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The band structure of single-walled SiC (<i>n</i><sub>1</sub>, <i>n</i><sub>2</sub>) nanotubes (<i>n</i><sub>1</sub> = 7, 0 ≤ <i>n</i><sub>2</sub> ≤ 7) as a function of spin and chirality has been calculated by the relativistic augmented cylindrical wave method. It has been found that the nanotubes are wide-band semiconductors with <i>E</i><sub><i>g</i></sub> ranging from 2.26 to 3.15 eV, and the spin–orbit splitting of the valence and conduction band edges are in the range 0.05–3.5 meV. The spin–orbit gap energies in righthanded and lefthanded enantiomers coincide, but the spins are opposite. Chiral nanotubes most suitable for selective spin transport with potentially high fluxes of α- and β-electrons in opposite directions have been determined.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142251746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Chemosensory Properties of Nanocomposite Ti0.2V1.8CTx–V2O5–SnO2 纳米复合材料 Ti0.2V1.8CTx-V2O5-SnO2 的化学感应特性
IF 2.1 3区 化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2024-09-15 DOI: 10.1134/s0036023624601703
E. P. Simonenko, A. S. Mokrushin, I. A. Nagornov, Yu. M. Gorban, T. L. Simonenko, N. P. Simonenko, N. T. Kuznetsov

Abstract

The method of modification of accordion-like complex Ti0.2V1.8CTx MXene with tin(IV) and vanadium oxides was developed based on hydrothermal synthesis of SnO2 in water-alcoholic medium in the presence of dispersed particles of two-dimensional vanadium-titanium carbide. Coating Ti0.2V1.8CTx-10 mol % SnO2 was deposited by microplotter printing on a specialized substrate followed by heat treatment in air at 300°С for 1 h. For the formed nanocomposite layer Ti0.2V1.8CTx–V2O5–SnO2, chemosensor properties were comprehensively studied for a number of analyte gases, including 100 ppm CO, NH3, NO2, benzene, acetone, ethanol, 1000 ppm H2, methane, and 10% oxygen. High sensitivity and selectivity of the nanocomposite at operating temperatures of 150 and 200°С to nitrogen dioxide were shown, the responses to 100 ppm NO2 were found to be 281 and 873%, respectively.

摘要 开发了用锡(IV)和钒氧化物改性手风琴状络合物 Ti0.2V1.8CTx MXene 的方法,其基础是在二维碳化钒钛分散颗粒存在下,在水-醇介质中水热合成 SnO2。对于形成的纳米复合层 Ti0.2V1.8CTx-V2O5-SnO2,对多种分析气体(包括 100 ppm CO、NH3、NO2、苯、丙酮、乙醇、1000 ppm H2、甲烷和 10% 氧气)的化学传感器性能进行了全面研究。结果表明,在 150 和 200°С 的工作温度下,纳米复合材料对二氧化氮具有高灵敏度和高选择性,对 100 ppm 二氧化氮的响应分别为 281% 和 873%。
{"title":"Chemosensory Properties of Nanocomposite Ti0.2V1.8CTx–V2O5–SnO2","authors":"E. P. Simonenko, A. S. Mokrushin, I. A. Nagornov, Yu. M. Gorban, T. L. Simonenko, N. P. Simonenko, N. T. Kuznetsov","doi":"10.1134/s0036023624601703","DOIUrl":"https://doi.org/10.1134/s0036023624601703","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The method of modification of accordion-like complex Ti<sub>0.2</sub>V<sub>1.8</sub>CT<sub><i>x</i></sub> MXene with tin(IV) and vanadium oxides was developed based on hydrothermal synthesis of SnO<sub>2</sub> in water-alcoholic medium in the presence of dispersed particles of two-dimensional vanadium-titanium carbide. Coating Ti<sub>0.2</sub>V<sub>1.8</sub>CT<sub><i>x</i></sub>-10 mol % SnO<sub>2</sub> was deposited by microplotter printing on a specialized substrate followed by heat treatment in air at 300°С for 1 h. For the formed nanocomposite layer Ti<sub>0.2</sub>V<sub>1.8</sub>CT<sub><i>x</i></sub>–V<sub>2</sub>O<sub>5</sub>–SnO<sub>2</sub>, chemosensor properties were comprehensively studied for a number of analyte gases, including 100 ppm CO, NH<sub>3</sub>, NO<sub>2</sub>, benzene, acetone, ethanol, 1000 ppm H<sub>2</sub>, methane, and 10% oxygen. High sensitivity and selectivity of the nanocomposite at operating temperatures of 150 and 200°С to nitrogen dioxide were shown, the responses to 100 ppm NO<sub>2</sub> were found to be 281 and 873%, respectively.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142251750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Carboxonium Derivatives of closo-Decaborate Anion [2,6-B10H8O2CC6H4R]– Based on Aromatic Carboxylic Acids: Synthesis and Physicochemical Properties 基于芳香族羧酸的闭癸酸阴离子[2,6-B10H8O2CC6H4R]-羧基衍生物:合成与理化性质
IF 2.1 3区 化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2024-09-15 DOI: 10.1134/s003602362460148x
A. V. Kolbunova, I. N. Klyukin, A. S. Kubasov, N. A. Selivanov, A. Yu. Bykov, A. P. Zhdanov, K. Yu. Zhizhin, N. T. Kuznetsov

Abstract

The series of carboxonium derivatives of the closo-decaborate anion of the general form [2,6-B10H8O2CC6H4R], where R = F, CH3, C3H7, and C6H5, were prepared. To obtain the target systems, the reaction between the [B10H11] anion and aromatic carboxylic acids was used. This process took place in two stages through the formation of a monosubstituted derivative of the general form [2-B10H9OC(OH)C6H4R], where R = F, CH3, C3H7, and C6H5, followed by intramolecular cyclization, leading to the formation of the target disubstituted carboxonium derivatives. The structure of the [2,6-B10H8O2CC6H4-C6H5] anion was determined by single-crystal X-ray diffraction. The resulting carboxonium derivatives are capable of protonation to form neutral systems of the general form [2,6-B10H8O2CC6H4R(Hfac)]0, where R = F, CH3, C3H7, C6H5. When a protonated carboxonium derivative of acetonitrile is added to a solution, a trisubstituted derivative of the general form [B10H7O2CC6H4R(NCCH3)]0 is formed.

摘要 本研究制备了一系列一般形式为[2,6-B10H8O2CC6H4R]-(其中 R = F、CH3、C3H7 和 C6H5)的闭癸酸阴离子羧鎓衍生物。为了获得目标体系,[B10H11]- 阴离子与芳香族羧酸发生了反应。这一过程分为两个阶段,首先形成通式为[2-B10H9OC(OH)C6H4R]-的单取代衍生物,其中 R = F、CH3、C3H7 和 C6H5,然后进行分子内环化,最终形成目标二取代羧基衍生物。通过单晶 X 射线衍射确定了 [2,6-B10H8O2CC6H4-C6H5]- 阴离子的结构。由此得到的羧鎓衍生物能够质子化,形成一般形式为 [2,6-B10H8O2CC6H4R(Hfac)]0 的中性体系,其中 R = F、CH3、C3H7、C6H5。当质子化的乙腈羧基衍生物加入溶液中时,会形成一般形式为[B10H7O2CC6H4R(NCCH3)]0 的三取代衍生物。
{"title":"Carboxonium Derivatives of closo-Decaborate Anion [2,6-B10H8O2CC6H4R]– Based on Aromatic Carboxylic Acids: Synthesis and Physicochemical Properties","authors":"A. V. Kolbunova, I. N. Klyukin, A. S. Kubasov, N. A. Selivanov, A. Yu. Bykov, A. P. Zhdanov, K. Yu. Zhizhin, N. T. Kuznetsov","doi":"10.1134/s003602362460148x","DOIUrl":"https://doi.org/10.1134/s003602362460148x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The series of carboxonium derivatives of the <i>closo</i>-decaborate anion of the general form [2,6-B<sub>10</sub>H<sub>8</sub>O<sub>2</sub>CC<sub>6</sub>H<sub>4</sub>R]<sup>–</sup>, where R = F, CH<sub>3</sub>, C<sub>3</sub>H<sub>7</sub>, and C<sub>6</sub>H<sub>5</sub>, were prepared. To obtain the target systems, the reaction between the [B<sub>10</sub>H<sub>11</sub>]<sup>–</sup> anion and aromatic carboxylic acids was used. This process took place in two stages through the formation of a monosubstituted derivative of the general form [2-B<sub>10</sub>H<sub>9</sub>OC(OH)C<sub>6</sub>H<sub>4</sub>R]<sup>–</sup>, where R = F, CH<sub>3</sub>, C<sub>3</sub>H<sub>7</sub>, and C<sub>6</sub>H<sub>5</sub>, followed by intramolecular cyclization, leading to the formation of the target disubstituted carboxonium derivatives. The structure of the [2,6-B<sub>10</sub>H<sub>8</sub>O<sub>2</sub>CC<sub>6</sub>H<sub>4</sub>-C<sub>6</sub>H<sub>5</sub>]<sup>–</sup> anion was determined by single-crystal X-ray diffraction. The resulting carboxonium derivatives are capable of protonation to form neutral systems of the general form [2,6-B<sub>10</sub>H<sub>8</sub>O<sub>2</sub>CC<sub>6</sub>H<sub>4</sub>R(H<sup>fac</sup>)]<sup>0</sup>, where R = F, CH<sub>3</sub>, C<sub>3</sub>H<sub>7</sub>, C<sub>6</sub>H<sub>5</sub>. When a protonated carboxonium derivative of acetonitrile is added to a solution, a trisubstituted derivative of the general form [B<sub>10</sub>H<sub>7</sub>O<sub>2</sub>CC<sub>6</sub>H<sub>4</sub>R(NCCH<sub>3</sub>)]<sup>0</sup> is formed.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142251739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis of Triethylammonium Salts of Amidine Derivatives of closo-Borate Anions [B10H10]2– and [B12H12]2– and Study of Their Cytotoxic Properties 闭合硼酸阴离子脒衍生物 [B10H10]2- 和 [B12H12]2- 的三乙基铵盐的合成及其细胞毒性研究
IF 2.1 3区 化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2024-09-15 DOI: 10.1134/s0036023624601892
M. N. Ryabchikova, A. V. Nelyubin, I. N. Klyukin, N. Yu. Karpechenko, A. P. Zhdanov, K. Yu. Zhizhin, N. T. Kuznetsov

Abstract

A series of amidine derivatives of the closo-decaborate and closo-dodecaborate anions with triethylammonium cations were obtained. The structures of the compounds was determined by multinuclear NMR spectroscopy and ESI-mass spectrometry. Cytotoxicity of all compounds obtained was investigated by MTT method on four cell lines. It was shown that the nature of the cation does not affect the cytotoxicity of the substituted closo-borates discussed.

摘要 获得了一系列以三乙基铵为阳离子的癸羧酸盐和十二羧酸盐脒衍生物。这些化合物的结构是通过多核核磁共振波谱和 ESI 质谱法确定的。用 MTT 法研究了所有化合物对四种细胞系的细胞毒性。结果表明,阳离子的性质并不影响所讨论的取代封闭硼酸盐的细胞毒性。
{"title":"Synthesis of Triethylammonium Salts of Amidine Derivatives of closo-Borate Anions [B10H10]2– and [B12H12]2– and Study of Their Cytotoxic Properties","authors":"M. N. Ryabchikova, A. V. Nelyubin, I. N. Klyukin, N. Yu. Karpechenko, A. P. Zhdanov, K. Yu. Zhizhin, N. T. Kuznetsov","doi":"10.1134/s0036023624601892","DOIUrl":"https://doi.org/10.1134/s0036023624601892","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A series of amidine derivatives of the <i>closo</i>-decaborate and <i>closo</i>-dodecaborate anions with triethylammonium cations were obtained. The structures of the compounds was determined by multinuclear NMR spectroscopy and ESI-mass spectrometry. Cytotoxicity of all compounds obtained was investigated by MTT method on four cell lines. It was shown that the nature of the cation does not affect the cytotoxicity of the substituted <i>closo</i>-borates discussed.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142251743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis and Thermodynamic Properties of Thulium Titanate 钛酸铥的合成与热力学性质
IF 2.1 3区 化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2024-09-15 DOI: 10.1134/s0036023624602046
P. G. Gagarin, A. V. Guskov, V. N. Guskov, A. V. Khoroshilov, K. S. Gavrichev

Abstract

The temperature stages of crystallization process for thulium titanate of pyrochlore structural type during the heating of hydroxide precursor obtained by reverse precipitation have been studied by DSC/TG, XRD, and electron microscopy. Tm2Ti2O7 has been measured in the temperature range 2–1870 K and thermodynamic functions at 0–1900 K and the Gibbs energy of formation from oxides and elements have been calculated based on smoothed heat capacity. The contribution of the Schottky anomaly at 20–320 K into heat capacity has been revealed.

摘要 利用 DSC/TG、XRD 和电子显微镜研究了通过反向沉淀获得的氢氧化物前驱体在加热过程中热绿球石结构类型的钛酸铥结晶过程的温度阶段。在 2-1870 K 的温度范围内测量了 Tm2Ti2O7,并根据平滑热容计算了 0-1900 K 的热力学函数以及氧化物和元素形成的吉布斯能。揭示了 20-320 K 时肖特基异常对热容量的贡献。
{"title":"Synthesis and Thermodynamic Properties of Thulium Titanate","authors":"P. G. Gagarin, A. V. Guskov, V. N. Guskov, A. V. Khoroshilov, K. S. Gavrichev","doi":"10.1134/s0036023624602046","DOIUrl":"https://doi.org/10.1134/s0036023624602046","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The temperature stages of crystallization process for thulium titanate of pyrochlore structural type during the heating of hydroxide precursor obtained by reverse precipitation have been studied by DSC/TG, XRD, and electron microscopy. Tm<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> has been measured in the temperature range 2–1870 K and thermodynamic functions at 0–1900 K and the Gibbs energy of formation from oxides and elements have been calculated based on smoothed heat capacity. The contribution of the Schottky anomaly at 20–320 K into heat capacity has been revealed.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142251738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis, Crystal Structure, and Thermodynamic Properties of Ca3Y2Ge3O12 Ca3Y2Ge3O12 的合成、晶体结构和热力学性质
IF 2.1 3区 化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2024-09-15 DOI: 10.1134/s0036023624700578
L. T. Denisova, D. V. Belokopytova, Yu. F. Kargin, G. V. Vasil’ev, V. M. Denisov, V. V. Beletskii

Abstract

Orthogermanate Ca3Y2Ge3O12 has been prepared via firing solid CaCO3, Y2O3, and GeO2 in air at 1773 K. Its X-ray diffraction crystal structure has been refined (space group Ia(bar {3})d, a = 12.80255(14) Å, V = 2098.34(7) Å3). The heat capacity of the prepared germanate in the range 320–1000 K has been determined by differential scanning calorimetry (DSC), and the experimental data have been used to calculate the thermodynamic properties of Ca3Y2Ge3O12.

摘要通过在1773 K空气中焙烧固体CaCO3、Y2O3和GeO2制备了锗酸盐Ca3Y2Ge3O12,并完善了其X射线衍射晶体结构(空间群Ia(bar {3})d,a = 12.80255(14)埃,V = 2098.34(7)埃3)。利用差示扫描量热法(DSC)测定了制备的锗酸盐在 320-1000 K 范围内的热容量,并利用实验数据计算了 Ca3Y2Ge3O12 的热力学性质。
{"title":"Synthesis, Crystal Structure, and Thermodynamic Properties of Ca3Y2Ge3O12","authors":"L. T. Denisova, D. V. Belokopytova, Yu. F. Kargin, G. V. Vasil’ev, V. M. Denisov, V. V. Beletskii","doi":"10.1134/s0036023624700578","DOIUrl":"https://doi.org/10.1134/s0036023624700578","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Orthogermanate Ca<sub>3</sub>Y<sub>2</sub>Ge<sub>3</sub>O<sub>12</sub> has been prepared via firing solid CaCO<sub>3</sub>, Y<sub>2</sub>O<sub>3</sub>, and GeO<sub>2</sub> in air at 1773 K. Its X-ray diffraction crystal structure has been refined (space group <i>Ia</i><span>(bar {3})</span><i>d</i>, <i>a</i> = 12.80255(14) Å, <i>V</i> = 2098.34(7) Å<sup>3</sup>). The heat capacity of the prepared germanate in the range 320–1000 K has been determined by differential scanning calorimetry (DSC), and the experimental data have been used to calculate the thermodynamic properties of Ca<sub>3</sub>Y<sub>2</sub>Ge<sub>3</sub>O<sub>12</sub>.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142251741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Russian Journal of Inorganic Chemistry
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1