Article
Chemistry, Multidisciplinary
Julijan Sarcevic, Tobias Heitkemper, Paul Niklas Ruth, Leonard Nass, Maximilian Kubis, Dietmar Stalke, Christian P. Sindlinger
Summary: Electron-deficient, anti-aromatic 2,5-disilyl boroles are a flexible molecular platform that can undergo various reactions with nucleophilic precursor dichloro silylene SiCl2(IDipp) to yield different products depending on the substitution pattern. Under certain conditions, SiCl2(IDipp) induces trimethylsilyl migration and adds to the generated carbene fragment to form an NHC-supported silylium ylide. Reduction of certain derivatives gives access to nido-type cluster Si(ii) half-sandwich complexes. Furthermore, reduction of an NHC-supported silylium ylide leads to the formation of an unprecedented NHC-supported silavinylidene, which rearranges to the nido-type cluster at elevated temperatures.
Article
Engineering, Environmental
Dibyajyoti Panja, Sadhan Dey, Sabuj Kundu
Summary: Heterogeneous cobalt catalysts were synthesized and the catalyst with cobalt:phenanthroline ratio of 1:6 showed the highest activity. The selective degradation of azo compounds using various alcohols was effectively carried out. The catalyst could be recycled up to 6th times and the reaction was favorable for substrates with electron-donating substituents. Alcohol dehydrogenation was identified as one of the slow steps and ordered transition states were demonstrated.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Optics
Can Li, Hongyi Zhang, Gangqiang Zhou, Liangjun Lu, Minhui Jin, Jianji Dong, Linjie Zhou, Jianping Chen
Summary: A multi-channel silicon photonic transmitter based on WDM and MDM was demonstrated, utilizing a silicon nitride Kerr frequency comb as the light source and silicon electro-optic modulators for optical modulation. By employing three wavelengths and two modes, the optical transmission capacity was increased to 150 Gb/s. The integration of WDM and MDM components with a compact optical comb source opens new avenues for high-capacity multi-dimensional optical transmission in the future.
Article
Medicine, General & Internal
Biagio Barone, Benito Fabio Mirto, Alfonso Falcone, Francesco Del Giudice, Achille Aveta, Luigi Napolitano, Dario Del Biondo, Matteo Ferro, Gian Maria Busetto, Celeste Manfredi, Daniela Terracciano, Raffaele Gambardella, Savio Domenico Pandolfo, Francesco Trama, Ciro De Luca, Raffaele Martino, Federico Capone, Gaetano Giampaglia, Enrico Sicignano, Octavian Sabin Tataru, Giuseppe Lucarelli, Felice Crocetto
Summary: Bacterial prostatitis is a common prostatic infection that significantly affects quality of life. The combination of appropriate antibiotics and nutraceutical products can enhance treatment efficacy. This study found that the combination therapy of Flogofilm (R) and fluoroquinolones demonstrated significant improvement in pain, urinary symptoms, and quality of life in patients with chronic bacterial prostatitis, as indicated by IPSS and NIH-CPSI scores, compared to fluoroquinolones alone.
JOURNAL OF CLINICAL MEDICINE
(2023)
Article
Physics, Multidisciplinary
Hang-Hang Wang, Wen-Qi Lu, Jiao Zhang, Jun Xu
Summary: This study investigates the properties of SiC films with different chemical compositions during high temperature oxidation. The experimental results show that the silicon-rich SiC film exhibits better high temperature anti-oxidation performance and a thinner oxidation layer.
Article
Materials Science, Multidisciplinary
Mario Khoury, Hugo Quard, Tobias Herzig, Jan Meijer, Sebastien Pezzagna, Sebastien Cueff, Marco Abbarchi, Hai Son Nguyen, Nicolas Chauvin, Thomas Wood
Summary: By ion beam implantation, light emitting G-centers can be directly embedded within Si-based Mie resonators, enabling size- and position-dependent, directional light emission. With optimal coupling with resonant antennas, a collection efficiency of about 90% can be achieved.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Energy & Fuels
F-J Haug, C. Ballif
Summary: The study determined the limiting efficiency of monolithic tandem solar cells using crystalline silicon for both the top and bottom cells, showing a significant advantage in terms of voltage and efficiency.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Chemistry, Multidisciplinary
Samantha L. Flores-Lopez, Belen Lobato, Natalia Rey-Raap, Ignacio Camean, Ana B. Garcia, Ana Arenillas
Summary: In recent years, the use of silicon-based materials as an anode alternative to graphite has been explored to improve the performance of lithium-ion batteries. This study evaluates carbon-silicon (C-Si) hybrid materials as potential precursors for the synthesis of crystalline silicon (cSi) and silicon carbide (SiC) in a single material. The magnesiothermal reduction process was used, resulting in materials with reduced Si and SiC. The C-Si hybrid gels exhibited improved performance compared to other materials, thanks to their homogeneous distribution and stability of the species developed.
Article
Chemistry, Physical
Xiuyun Zhao, Nathiya Kalidas, Vesa-Pekka Lehto
Summary: Silicon is a highly promising anode material for next-generation lithium-ion batteries due to its high capacity and safe potential. Mesoporous silicon has been widely studied for its ability to accommodate volume expansion during cycling and provide stable battery performance. This research investigates the impact of pore characteristics on battery performance by producing self-standing mesoporous silicon films without carbon additives. The study finds that porosity and surface area greatly affect specific capacity and initial Coulombic efficiency, while cycling performance is mainly determined by film thickness. The best mesoporous silicon film anode achieves stable cycling for over 450 cycles with an initial Coulombic efficiency of 81.2% and a limited specific capacity of 1200 mAh/g. This study provides valuable insights for the development of high-performance lithium-ion batteries.
JOURNAL OF POWER SOURCES
(2022)
Article
Electrochemistry
Guomin Li, Chenming Fan, Heng Wang, Xiaoqiang Zhan, Jinglin You, Bing Li
Summary: Si-Cu composites with interconnected porous structures were synthesized by pulse electrodeposition. These composites showed excellent ion transfer properties and electrochemical performances, exhibiting good cycling stability as an anode material in lithium-ion batteries. This finding provides a new approach for the preparation of interconnected porous materials.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Jing Zhan, Zhendong Lei, Xing Liu, Mengjia Yang, Minyue Li, Haiping Fang, Yong Zhang, Yong Wang, Guosheng Shi
Summary: This study focused on the development of high-performance potassium-ion batteries using graphene paper as the research material. By fabricating a KxCl-rGO electrode, the researchers achieved a high reversible capacity, improved cycling stability, and enhanced potassium-ion diffusion. The results showed promising potential for the application of KxCl-rGO in potassium-ion batteries.
Article
Multidisciplinary Sciences
Artem A. Osipov, Gleb A. Iankevich, Anastasia B. Speshilova, Alina E. Gagaeva, Armenak A. Osipov, Yakov B. Enns, Alexey N. Kazakin, Ekaterina Endiiarova, Ilya A. Belyanov, Viktor I. Ivanov, Sergey E. Alexandrov
Summary: In this work, the high efficiency of optical emission spectroscopy in estimating the etching profile of silicon structures in SF6/C4F8/O-2 plasma is demonstrated. The optimal intensity ratios for different structure sizes and aspect ratios were investigated, and the influence of process parameters on various etching characteristics was also studied.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Multidisciplinary
M. Ghasemi, S. M. Hamidi, M. Mohseni, M. M. Ariannejad, P. K. Choudhury
Summary: The spectral response of silicon photonic circuits based on Mach-Zehnder Interferometers (MZIs) integrated with/without apodized corrugated waveguide gratings was investigated. The closed-loop interferometers (CLIs) in these circuits naturally alter the phase of the signal in a nonlinear manner and produce a noisy signal. The optimized design of the apodized corrugated waveguides was used in the CLI arm to ensure side-lobe suppression. Analyzing the interferometers with balanced and/or unbalanced arms revealed that positioning four apodized corrugated waveguides in the balanced arms of two closed-loop MZIs critically governs phase modulation constructively to produce spectra with sine waves.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Engineering, Electrical & Electronic
Marco Stecca, Changyu Tan, Junzhong Xu, Thiago Batista Soeiro, Pavol Bauer, Peter Palensky
Summary: In this article, the conduction and switching performance of a hybrid Si/SiC switch modulation (HyS) with minimum SiC MOSFET conduction (mcHyS) is experimentally characterized and an analytical model for the chip area of the HyS configuration is derived. The study compares the mcHyS modulation concepts against single-technology switches and typical HyS modulation in terms of cost and power conversion efficiency for different industrial applications. The results show that the HyS solutions are competitive, particularly for applications operating at low partial loads.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Energy & Fuels
Lucia V. Mercaldo, Eugenia Bobeico, Antonella De Maria, Marco Della Noce, Manuela Ferrara, Vera La Ferrara, Laura Lancellotti, Gabriella Rametta, Gennaro V. Sannino, Iurie Usatii, Paola Delli Veneri
Summary: Perovskite/silicon tandem solar cells have potential for high efficiency and low cost photovoltaics, and can improve infrared light management and resilience to shunts through optimized design. By fabricating solar cells with specific structures on n-type silicon wafers, it is possible to achieve a combined V-OC for both materials.
Article
Chemistry, Multidisciplinary
Lukas Klemmer, Anna-Lena Thoemmes, Michael Zimmer, Volker Huch, Bernd Morgenstern, David Scheschkewitz
Summary: The study reports thermally induced, transition-metal-free metathesis of unsymmetrically substituted digermenes. The use of tethered auxiliary donors helps stabilize the transient germylene fragments, promoting the metathesis reaction. Density functional theory calculations reveal the thermodynamic driving force of the metathesis and the crucial role of tethered donors in the reaction. The bridged tetragermadiene precursor can also undergo heavier acyclic diene metathesis polymerization, similar to the carbon case, resulting in polydigermene formation.
Review
Chemistry, Multidisciplinary
Yannic Heider, David Scheschkewitz
Summary: This review provides a comprehensive overview of the state of the art in the synthesis of molecular silicon clusters, which are divided into three different categories. It emphasizes the importance of functionalization as a necessary prerequisite for the design and construction of more extended systems.
Article
Chemistry, Multidisciplinary
Paresh Kumar Majhi, Michael Zimmer, Bernd Morgenstern, Volker Huch, David Scheschkewitz
Summary: Transition metal p-allyl complexes play important roles in various catalytic and stoichiometric allylation reactions. In this study, the first transition metal complex of a heavier allylic pi-system was reported, providing insights into the formation process and coordination behavior of the complex.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Paresh Kumar Majhi, Michael Zimmer, Bernd Morgenstern, David Scheschkewitz
Summary: A novel sesquimetallic complex containing a Si2Ge cyclopropene has been synthesized, showing a unique coordination mode where the sigma-component of the Ge = Si double bond acts as both a donor and acceptor, allowing for the formation of a nearly unsupported Si-Ge pi-bond. This complex can be easily modified and substituted with different functional groups, providing access to a variety of nickel complexes with high yields.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Inorganic & Nuclear
Andreas T. Kell, Naim M. Obeid, Prasenjit Bag, Michael Zimmer, Volker Huch, David Scheschkewitz
Summary: The regiodivergent reaction of phenylacetylene with various disilenes and bridged tetrasiladienes was studied, revealing that the regioselectivity of the [2+2] cycloaddition strongly depends on the nature of the substituent R. The presence of catalytic quantities of base suppresses cycloaddition in favor of the formal CH addition of phenylacetylene. Intermediacy of an alkynyl-substituted disilanyl lithium suggests a carbolithiation pathway for the net CH addition.
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
(2021)
Article
Chemistry, Inorganic & Nuclear
Thomas Buettner, Konstantin Weisshaar, Philipp Willmes, Volker Huch, Bernd Morgenstern, Rolf Hempelmann, David Scheschkewitz
Summary: The synthesis of p-methylthio-functionalized disilenes with (oligo)phenylene-linkers of different sizes was reported, with Si-29 NMR and UV/vis data suggesting that the linker-size only moderately affects the Si=Si moiety. Cyclic voltammetry showed an increasing number of reduction events with the number of phenylene rings, clearly associated with the oligo(phenylene) linking unit. Significant differences in the exchange current density of oxidation and reduction reactions were observed between the prepared disilenes using linear sweep voltammetry with a rotating disc electrode.
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
(2021)
Article
Chemistry, Inorganic & Nuclear
Marcel Lambert, Nadine E. Poitiers, Volker Huch, Andrea Goforth, David Scheschkewitz
Summary: The first silicon-carbon hybrid ladderanes with highly distorted ring systems and long silicon-carbon bridgehead bonds were obtained.
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
(2022)
Article
Chemistry, Multidisciplinary
Nadine E. Poitiers, Volker Huch, Bernd Morgenstern, Michael Zimmer, David Scheschkewitz
Summary: This study reports the growth of stable siliconoid clusters through a series of substitution, rearrangement, and reduction reactions with a single germanium atom. The findings are significant for understanding nucleation processes in gaseous and condensed phases.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Polymer Science
Hanna Huebner, Bart-Jan Niebuur, Thomas Buettner, Marcus Koch, Bernd Stuehn, Tobias Kraus, David Scheschkewitz, Markus Gallei
Summary: This study characterizes the self-assembled structures of PDMSB-b-P2VP block copolymer in different solvents and evaluates its response to different solvents and temperatures. The influence of additional solvents, temperature, and ultrasonication on colloidal dispersion is investigated. Additionally, the introduction of surfactants in the solvent evaporation method leads to a plethora of additional colloidal structures.
Article
Chemistry, Inorganic & Nuclear
Marc Hunsicker, Nadine E. Poitiers, Volker Huch, Bernd Morgenstern, Michael Zimmer, David Scheschkewitz
Summary: A new potential model system for silicon monoxide has been synthesized by connecting an unsaturated silicon cluster with a polyhedral silsequioxane cage. The stoichiometry between silicon and oxygen in this model system is 14:12.
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
(2022)
Article
Chemistry, Multidisciplinary
Philipp Dabringhaus, Silja Zedlitz, Luisa Giarrana, David Scheschkewitz, Ingo Krossing
Summary: Schnockel's [(AlCp*)(4)] and Jutzi's [SiCp*][B(C6F5)(4)] are important in modern main-group chemistry with various applications in synthesis and catalysis. However, the reactivity between AlCp* and [SiCp*](+) has not been explored. In this study, their reaction was investigated and complex salts [Cp*Si(AlCp*)(3)][WCA] were obtained. The tetrahedral [SiAl3](+) core not only represents a rare example of a low-valent silicon-doped aluminium-cluster, but also provides a convenient preparative entry towards low-valent Si-Al clusters.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Taiki Imagawa, Luisa Giarrana, Diego M. Andrada, Bernd Morgenstern, Masaaki Nakamoto, David Scheschkewitz
Summary: By a series of addition and reduction reactions, the synthesis of a structurally rare silapyramidane compound was achieved from an amidinate-supported silylene and tetrakis(trimethylsilyl)cyclobutadiene as starting materials. The silapyramidane compound exhibited an unusually shielded 29Si NMR resonance at -448.3 ppm for the apex silicon atom. Treatment of the silapyramidane with Fe2(CO)9 resulted in the formation of the corresponding silapyramidane-iron complex. Moreover, the silapyramidane also underwent a reaction with the cyclobutadiene starting material to afford a fluorescent spirobis(silole) compound.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Philipp Grewelinger, Tim Wiesmeier, Carsten Praesang, Bernd Morgenstern, David Scheschkewitz
Summary: A straightforward synthesis of the first peraryl diboriranide was reported, demonstrating its preference for s-type coordination modes towards main group and transition metal centers. The synthesis involved the preparation of the non-classical diborirane from a readily available 1,2-dichlorodiborane(4) and subsequent conversion to the peraryl diboriranide lithium salt in three steps. Representative complexes with tin, copper, gold, and zinc were prepared and characterized to illustrate the reactivity and complexation behavior of the diboriranide.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Inorganic & Nuclear
Thomas Buettner, Oliver Janka, Volker Huch, Debabrata Dhara, Anukul Jana, David Scheschkewitz
Summary: In this study, a new single source chemical vapor deposition (CVD) method was developed for the synthesis of binary iron-germanium thin films. The technique allows for the preparation of uniform and dense Fe(x)G(e)y films under standard CVD conditions, without the need for harsh conditions.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Debabrata Dhara, David Scheschkewitz, Vadapalli Chandrasekhar, Cem B. Yildiz, Anukul Jana
Summary: The reactivity of isolable Au(i)-hydride stabilized by an NHC-coordinated diphosphene towards substrates containing C-C and N-N multiple bonds was reported. Different products were obtained in reactions with dimethyl acetylenedicarboxylate, azobenzene, ethyl diazoacetate, and phenyl acetylene, showing higher reactivity compared to a related NHC-stabilized Au(i)-hydride without the mediating diphosphene moiety.
CHEMICAL COMMUNICATIONS
(2021)
Review
Chemistry, Multidisciplinary
Dan He, Yawen Li, Fuwen Zhao, Yuze Lin
Summary: High trap density in organic solar cells leads to localized charge carriers and reduced carrier lifetime, limiting device efficiency. This feature article summarizes the recent advances of trap suppression by material design and device engineering.
CHEMICAL COMMUNICATIONS
(2024)
Review
Chemistry, Multidisciplinary
Olivier Monfort, Arshitha Madhusudhan, Martin Motola
Summary: This article presents the advantages of coupling photocatalysis and Fenton-based processes for environmental remediation and discusses their synergy. It critically examines the simultaneous triggering of these two processes and provides insights into research approaches. The study aims to enhance understanding of this complex process and highlight the potential integration of new catalysts in current wastewater treatment technology.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Manideepa Dhar, Chittaranjan Mishra, Avijit Das, Uttam Manna
Summary: An approach of 'polymerization of monomers in its aggregated form' has been introduced to tailor the water wettability of fibrous and porous substrates, achieving hydrophobicity to superhydrophobicity transition, as well as patterned wettability. This facile chemical method provides a durable coating with adjustable and patterned wettability for various potential applications.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Saswat Ranjan Bhoi, Chhanda Debnath, Shikha Gandhi
Summary: In this article, a novel catalytic reaction using Pd(0) and Bronsted acid is reported for the synthesis of biologically important imidazolidinone-fused N-heterocycles through redox-neutral intramolecular N-allylation of indoles and pyrroles with alkynes. This atom-economical method is applicable to a wide range of substrates and eliminates the need for leaving groups or oxidizing agents commonly used in traditional allylation reactions.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Longkun Chen, Mingshuai Zhang, Meichen Liu, Zhuoyuan Liu, Yuetong Qiu, Zhilai Zhang, Fuchao Yu, Jiuzhong Huang
Summary: In this study, an efficient Rh(III)-catalyzed selective mono- and dual-C-H bond functionalization/cyclization with iodonium ylide as the sole coupling partner was demonstrated. Fused benzodiazepine skeletons were obtained in excellent yields, providing an improved approach to dual C-H unsymmetrical functionalization.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Alice Kennett, Sven Epple, Gabriella van der Valk, Irene Georgiou, Evelyne Gout, Romain R. Vives, Angela J. Russell
Summary: This study presents the design and synthesis of sulfated disaccharide inhibitors based on IdoA(2S)-GlcNS(6S), which showed potent inhibition of Sulf-2. The results suggest that IdoA(2S)-GlcNS(6S) is the shortest fragment size required for effective inhibition of Sulfs, and a trisulfated disaccharide is identified as the minimal fragment size of heparan sulfate for effective endosulfatase inhibition.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Mauro Garbini, Andrea Brunetti, Riccardo Pedrazzani, Magda Monari, Massimo Marcaccio, Giulio Bertuzzi, Marco Bandini
Summary: The self-adaptability of galvanostatic electrolysis was found to be helpful in a multistage chemo- and diastereoselective electrochemically promoted cyclodimerization of chalcones. Through a series of reductive events, densely functionalized cyclopentanes with five contiguous stereocenters were obtained (25 examples, yields up to 95%, dr values up to >20:1). Further experimental and electrochemical investigations indicated the crucial role of dynamic kinetic resolution of the aldol intermediate in the reaction mechanism.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Dhananjay S. Nipate, Neha Meena, Prakash N. Swami, Krishnan Rangan, Anil Kumar
Summary: In this study, the synthesis of functionalized benzo[a]phenazines and indazolo[2,3-a]quinolines was achieved through Rh(III)-catalyzed oxidative annulation of 2-arylquinoxalines and 2-aryl-2H-indazoles with allyl alcohols. The method showed a wide substrate scope, excellent functional group tolerance, good to high yields of annulated products, and the capability for scaled-up synthesis. A tentative mechanism of the annulation reaction was proposed based on a preliminary mechanistic investigation.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Ruonan Zhang, Abudukadi Tudi, Xia Yang, Xuping Wang, Zhihua Yang, Shujuan Han, Shilie Pan
Summary: A new lead tellurium borate material with a unique fundamental building block [B4O10] was synthesized and found to exhibit high birefringence. The structure-property relationship was discussed using first-principles calculations.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Amresh Kumar Singh, Baishali Thakurta, Anupam Giri, Monalisa Pal
Summary: This study introduces three key concepts for the quick synthesis of large-scale high-quality 2D materials films and their utilization in device fabrication.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Reina Hagiwara, Shun Nishimura, Kosuke Okeyoshi
Summary: A copolymer-conjugated nanocatalytic system has been developed to improve electron transfer and enhance photoinduced H2 generation.
CHEMICAL COMMUNICATIONS
(2024)