Jiarong Mai, Shuang Xia, Nan Wang, L. Fu, Lili Liu, Nengfei Yu, Yuping Wu, Rudolf Holze
{"title":"Adding CNTs into Anthracite towards High Performance Anode Materials for Lithium Ion Batteries","authors":"Jiarong Mai, Shuang Xia, Nan Wang, L. Fu, Lili Liu, Nengfei Yu, Yuping Wu, Rudolf Holze","doi":"10.1002/zaac.202400041","DOIUrl":"https://doi.org/10.1002/zaac.202400041","url":null,"abstract":"Commercial graphite anodes face the problems of high preparation temperature and limited specific capacity in lithium‐ion batteries (LIBs). Amorphous carbon anode materials are prepared at low temperatures and have abundant sources of preparation. As a low‐cost carbon source material, anthracite has a practical application value in storing lithium as anode electrodes of LIBs. However, the capacity is not enough to meet the present increasing demand. We added CNTs to enhance the performance of anthracite‐based carbon anodes. The addition of CNTs significantly improves the electrical properties of amorphous carbon anode materials due to the good electronic conductivity. This anthracite‐based carbon with CNTs (A‐C) anode displays a specific cycling capacity of 360 mAh·g‐1 at the current density of 200 mA·g‐1 after 200 cycles in LIBs. We believe that the work has far‐reaching significance for improving the practicability of amorphous carbon anode materials.","PeriodicalId":23934,"journal":{"name":"Zeitschrift für anorganische und allgemeine Chemie","volume":"104 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141361310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"LnSb2O4Br (Ln=Nd and Er) and Sb4O5Br2: Lanthanoid‐Bearing and ‐Free Antimony(III) Oxide Bromides","authors":"R. Locke, Maria Weis, Thomas Schleid","doi":"10.1002/zaac.202300243","DOIUrl":"https://doi.org/10.1002/zaac.202300243","url":null,"abstract":"Sb4O5Br2 crystallizes plate‐shaped in the monoclinic space group P21/c with the lattice parameters a=660.82(5) pm, b=513.71(4) pm, c=1346.35(9) pm and β=97.876(3)° for Z=2. Its crystal structure contains \u0000{[Sb4O5]2+} layers with connected [(Sb1)O3+1]5− ψ1‐units and undisturbed pyramidal [(Sb2)O3]3− ψ1‐units, where the free electron pair is counted as a pseudo‐ligand (ψ). The bromide anions required for charge compensation of these cationic \u0000{[Sb4O5]2+} layers form single sheets and are only bonded via van‐der‐Waals interactions in this crystal structure, as the nearest distance to antimony cations is at least 300 pm. NdSb2O4Br crystallizes plate‐shaped in the monoclinic space group P21/c as well, but with the lattice parameters a=896.24(6) pm, b=801.16(5) pm, c=799.27(5) pm and β=92.129(3)° for Z=4. The [NdO8]13− polyhedra are linked to each other via four edges and thus form fluorite‐related layers \u0000{[NdO\u0000]5−}, which run parallel to the (100) plane. The [SbO3]3− anions share vertices to build chains \u0000{[SbO\u0000O\u0000]−} along [001], which align parallel within the (100) plane. The isolated Br− anions arrange in layers and show a minimum distance of 319 pm to the next Sb3+ cation. ErSb2O4Br crystallizes plate‐shaped in the non‐centrosymmetric tetragonal space group P4212 with the lattice parameters a=774.76(4) pm, c=899.53(6) pm and c/a=1.161 for Z=4. The erbium‐oxygen environment appears to be roughly the same as in NdSb2O4Br, so the main difference is the linkage of the ψ1‐[SbO3]3− units. Four of these [SbO3]3− anions assemble in a ring structure \u0000{[Sb4O8]4−} by sharing corners. Layers of rings are located in the (001) plane and almost planar bromide‐anion slabs assemble between the antimony‐oxygen layers. In this article, all three crystal structures are compared with each other and single‐crystal Raman spectra were recorded and analyzed for NdSb2O4Br and ErSb2O4Br.","PeriodicalId":23934,"journal":{"name":"Zeitschrift für anorganische und allgemeine Chemie","volume":"51 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141268915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sebastian Egner, Oluseun Akintola, Winfried Plass, Phil Liebing, Nils Schlörer, Gerald Hörner, Birgit Weber
{"title":"Axial Perturbation of Intermediate Spin (S = 3/2) Iron(III) Complexes with Square Pyramidal N4X Coordination: Solid State Structures and Electronic Properties","authors":"Sebastian Egner, Oluseun Akintola, Winfried Plass, Phil Liebing, Nils Schlörer, Gerald Hörner, Birgit Weber","doi":"10.1002/zaac.202400061","DOIUrl":"https://doi.org/10.1002/zaac.202400061","url":null,"abstract":"The combination of planar‐directing, strong‐field [N4] ligands with a weak axial field component is known to stabilize five‐coordinate iron(III) complexes in otherwise uncommon spin states. In this work, a series of axially perturbed iron(III) complexes of an [N4] macrocyclic ligand of the Jäger type, [Fe(L)X] (with X: Cl, Br, I, NCS) gave intermediate‐spin ground states with axially steered admixture of the high‐spin state, S = 3/2; 5/2. The nature of the electronic ground‐state as deduced from SQUID magnetometry, 57Fe Mössbauer spectroscopy in the solid, and 1H NMR and EPR spectroscopies in (frozen) solutions was discussed in the light of the solid‐state structures, which were obtained from single‐crystal X‐ray diffraction. A DFT‐based protocol was established to quantify the axial field effects and, by including relevant [N4] systems, predict the differential equatorial ligand field components.","PeriodicalId":23934,"journal":{"name":"Zeitschrift für anorganische und allgemeine Chemie","volume":"7 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141271054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Fundamental Perspective on the Selective Zn Substitution in Ternary Ordered Intermetallic Compound Cu 6 Zn 2 Sb 2","authors":"Nilanjan Roy","doi":"10.1002/zaac.202400030","DOIUrl":"https://doi.org/10.1002/zaac.202400030","url":null,"abstract":"The unique site substitution of Zn in the structure of tetragonal and atomically ordered Cu6Zn2Sb2, followed by the formation of Cu5Zn3Sb2, has been addressed from fundamental perspectives. First principles energy calculations, and semi‐empirical electronic structure calculations using the density of states, crystal orbital Hamilton population, crystal orbital bond index and Mulliken population analysis were performed to understand the observed substitution pattern and the narrow homogeneity range of the titled compound. Mulliken and Löwdin’s approach of charge analysis explain the experimentally proved ‘coloring’ based on the ‘site energy’ argument. The concept of ‘topological charge stabilization’ has been introduced in this context. Valence electron concentration and the optimization of the partially covalent Cu‐Sb interactions also play pivotal role in the electronic stability of the titled phase.","PeriodicalId":23934,"journal":{"name":"Zeitschrift für anorganische und allgemeine Chemie","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141273341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Ammonothermal Synthesis and Crystal Structure of the Ternary Amide Na2Ba(NH2)4","authors":"F. M. Engelsberger, Kristian Witthaut, W. Schnick","doi":"10.1002/zaac.202400053","DOIUrl":"https://doi.org/10.1002/zaac.202400053","url":null,"abstract":"The ternary amide Na2Ba(NH2)4 was synthesized at ammonothermal conditions (870 K, 135 MPa) in custom‐built high‐pressure autoclaves. The compound was structurally characterized using X‐ray diffraction and crystallizes in space group Pccn (no. 56) with lattice parameters a = 10.6492(2), b = 7.8064(2) and c = 8.1046(2) Å. To the best of our knowledge, the structure type has not yet been observed in any ternary amide before and can be described as a defective variant of the NaCl structure type. The presence of amide ions in the compound is verified by Fourier‐transform infrared (FTIR) spectroscopy and the experimental spectrum is compared to the theoretical spectrum obtained through density functional theory (DFT) calculations. Na2Ba(NH2)4 complements the range of reported ternary alkali metal alkaline‐earth metal amides with the smallest Shannon radius ratio of rA/AE = 0.76. The influence of this ratio on the formation of the new structure type is discussed as well. The characterization of intermediate species such as this ternary amide extends the understanding of the ammonothermal synthesis and can be useful for synthetic control in the formation of nitrides at ammonothermal conditions.","PeriodicalId":23934,"journal":{"name":"Zeitschrift für anorganische und allgemeine Chemie","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141273955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Front Cover: On the Equilibrium of Mono‐ and Dinuclear Cu(II) Dimethylglyoxime Complexes and its Exploitation for the Simple Preparation of Cu(I) Salts [Cu(CH3CN)4]X (X=ClO4−, BF4−, OTf−) (Z. Anorg. Allg. Chem. 9‐10/2024)","authors":"Raphael I. Petrikat, Thomas Frick, Sabine Becker","doi":"10.1002/zaac.202480901","DOIUrl":"https://doi.org/10.1002/zaac.202480901","url":null,"abstract":"","PeriodicalId":23934,"journal":{"name":"Zeitschrift für anorganische und allgemeine Chemie","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141194802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Electromagnetic Wave Absorption Properties of Single‐Source‐Precursor Derived CNWs/Ni2Si/SiOC Nanocomposites","authors":"Ting Chen, Hanzi Du, Ralf Riedel, Zhaoju Yu","doi":"10.1002/zaac.202300236","DOIUrl":"https://doi.org/10.1002/zaac.202300236","url":null,"abstract":"This work successfully fabricated a novel CNWs/Ni<jats:sub>2</jats:sub>Si/SiOC nanocomposite ceramic material using a single‐source‐precursor derived ceramic approach. The material exhibits <jats:italic>in‐situ</jats:italic> formation of carbon nanowires (CNWs) and multiple core‐shell nanoparticles such as Ni<jats:sub>2</jats:sub>Si@C and SiC@C. The reaction mechanism of the precursor, the microstructure and phase composition, and the ceramics′ electromagnetic wave (EMW) absorbing properties were thoroughly investigated and discussed. The obtained CNWs/Ni<jats:sub>2</jats:sub>Si/SiOC nanocomposite ceramics possesses a minimum reflection loss (RLmin) of −43.5 dB, indicating excellent EMW absorbing performance. The <jats:italic>in‐situ</jats:italic> formation of CNWs and multi‐core‐shell nanoparticles (Ni<jats:sub>2</jats:sub>Si@C and SiC@C) in the ceramics play a crucial role in enhancing their EMW absorbing properties compared to pure SiOC ceramics.","PeriodicalId":23934,"journal":{"name":"Zeitschrift für anorganische und allgemeine Chemie","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141189324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jesvita Cardozo, Ouchan He, Wanli Ma, Kallol Ray, Thomas Braun
{"title":"An Iminophosphinite Pincer Iridium Complex: Synthesis and Catalytic Tool for Alkane Transfer Dehydrogenations","authors":"Jesvita Cardozo, Ouchan He, Wanli Ma, Kallol Ray, Thomas Braun","doi":"10.1002/zaac.202400028","DOIUrl":"https://doi.org/10.1002/zaac.202400028","url":null,"abstract":"A [(POCN)Ir(H)(OAc)] complex bearing an iminophosphinite pincer ligand was synthesized. The complex showed catalytic transfer dehydrogenation of various linear and cyclic alkanes with reasonable conversions and a maximum TON of 400 for n‐octane. A catalytic isomerization of 1‐octene to yield internal octenes was also possible. It is notable that the catalyst could perform catalytic transfer dehydrogenation even at a temperature of 100 °C with a TON of 100.","PeriodicalId":23934,"journal":{"name":"Zeitschrift für anorganische und allgemeine Chemie","volume":"192 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141194658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Selective Synthesis of New Hexaalkylbicyclo[1.1.1]pentasilanes with Improved Solubility","authors":"Yukihiro Morino, S. Ishida, T. Iwamoto","doi":"10.1002/zaac.202400056","DOIUrl":"https://doi.org/10.1002/zaac.202400056","url":null,"abstract":"Molecular structures and properties of molecular silicon clusters and oligo/polysilanes depend on the substituents on the silicon skeletons. Herein, we report the synthesis of new bicyclo[1.1.1]pentasilanes (BPS) having various alkyl substituents (ethyl, iBu, or 2‐ethylbutyl) at the bridge silicon atoms. All new BPS are characterized by NMR spectroscopy, MS spectrometry, and single crystal X‐ray diffraction (sc‐XRD) analysis. Introduction of longer alkyl groups and unsymmetrical substitution of alkyl groups at the bridge positions on the BPS skeleton substantially improve the solubility toward organic solvents, while the electronic properties are similar to each other.","PeriodicalId":23934,"journal":{"name":"Zeitschrift für anorganische und allgemeine Chemie","volume":"14 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141112525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
David van Gerven, Alisha Mertens, Katrin Eppers, Jasper Nickelsen, Mathias Wickleder
{"title":"In situ crystallization of methanesulfonic acid, CH3SO3H, and serendipitous single crystal formation of its anhydride, (CH3)2S2O5","authors":"David van Gerven, Alisha Mertens, Katrin Eppers, Jasper Nickelsen, Mathias Wickleder","doi":"10.1002/zaac.202400019","DOIUrl":"https://doi.org/10.1002/zaac.202400019","url":null,"abstract":"Methanesulfonic acid, CH3SO3H, has been crystallized using an in situ technique on a single crystal diffractometer. The crystal structure is monoclinic (P21/c, Z = 4, a = 842.07(4) pm, b = 582.20(3) pm, c = 820.38(4) pm, β = 106.459(2)°) and stamped by the presence of strong hydrogen bonds. Single crystals of the anhydride of methanesulfonic acid, (CH3)2S2O5, formed as a side product in the reaction of bis‐trimethylsilyl‐sulfate, [(CH3)3SiO]2SO2 with SO3 in a sealed glass ampoule. The monoclinic crystal structure (P21/n, Z = 12, a = 1794.5(2) pm, b = 831.75(7) pm, 1383.4(1) pm, β = 110.630(4)°) shows three crystallographically different (CH3)2S2O5 molecules in the unit cell. According to the orientation of the CH3 groups with respect to each other the (CH3)2S2O5 molecule appears as the so‐called trans‐conformer. The structure of both molecules is corroborated by quantum mechanical DFT calculations.","PeriodicalId":23934,"journal":{"name":"Zeitschrift für anorganische und allgemeine Chemie","volume":"7 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141113436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}