Article
Chemistry, Multidisciplinary
Tobias Eder, Florenz Buss, Lukas F. B. Wilm, Michael Seidl, Maren Podewitz, Fabian Dielmann
Summary: This paper reports a new oxidative fluorination reagent consisting of an SF5- anion and a chemically inert phosphonium cation, which is thermally stable. Using this reagent, the SeF5- and TeF5- anions were successfully generated and tetrafluoro(phenyl)-lambda(5)-selenate and -tellurate were synthesized. Furthermore, further derivatization of the tetrafluoro(phenyl)-lambda(5)-tellurate allowed the introduction of functional groups into organic molecules.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Green & Sustainable Science & Technology
J. Azadmanjiri, L. Dekanovsky, Z. Sofer
Summary: In this research, different hybrid nanostructures were synthesized by annealing Ti3C2Tx with pre-selected group VI chalcogen elements. Among them, the Te/Ti3C2Tx supercapacitor showed the highest specific capacitance (150.6 F/g), as well as good cycling stability and energy density. These improvements were attributed to the formation of TiO2 and the large polarizability of the Te element.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Plant Sciences
Dazhong Zhang, Yuanbo Zhang, Hao Zhou, Hairong Wang, Yujie Gao, Leilei Shao, Qin Ding, Lingjian Ma
Summary: The study reveals that chalcogenide elements can effectively alleviate wheat toxicity under Cd stress and reduce Cd accumulation. Additionally, selenium and tellurium contribute to increasing root diameter, inhibiting lateral root formation, and reducing Cd uptake.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2022)
Article
Biochemistry & Molecular Biology
Maxim Musalov, Vladimir A. Potapov, Vladimir A. Yakimov, Maria Musalova, Arkady A. Maylyan, Sergey Zinchenko, Svetlana Amosova
Summary: The regioselective synthesis of novel functionalized condensed organochalcogen compounds was achieved through chalcogenocyclofunctionalization reactions based on chalcogen halides and natural products thymol and carvacrol. Various selenides, sulfides, telluranes, and ditellurides were successfully synthesized with high yields, highlighting the distinct reactivity of sulfur, selenium, and tellurium halides in the reactions.
Article
Chemistry, Multidisciplinary
Christopher Cremer, Monalisa Goswami, Christian K. Rank, Bas de Bruin, Frederic W. Patureau
Summary: This study reports the Te-II/Te-III-catalyzed dehydrogenative C-H phenothiazination of challenging phenols with electron-withdrawing substituents under mild aerobic conditions, achieving high yields. The unexpected Te-II/Te-III radical catalytic properties were characterized through cyclic voltammetry, EPR spectroscopy, kinetic experiments, and DFT calculations.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Alexander Vinokurov, Vadim Popelensky, Sergei Bubenov, Nikolay Kononov, Kirill Cherednichenko, Tatyana Kuznetsova, Sergey Dorofeev
Summary: Nanocrystals of Si doped with S, Se and Te were synthesized at high temperatures and their structure, morphology, and optical and electrical properties were studied. The presence of sulfur and selenium resulted in recrystallization of Si and the formation of crystalline rods with unique cross-sections, while samples doped with sulfur and selenium showed high conductivity.
Article
Chemistry, Organic
Guilherme Lutz, Juliano Ten Kathen Jung, Davi Fernando Back, Cristina Wayne Nogueira, Gilson Zeni
Summary: This study demonstrated the reaction of 2-amino arylalkynyl ketones with organoselenolates to form (Z)-vinyl selenides, which further led to the formation of 4-organoselenyl quinolines. Investigation of the reaction mechanism and the application of the prepared compounds in the cleavage of carbon-selenium bonds and Suzuki/Sonogashira reactions were also conducted.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Maria Carla Aragoni, Massimiliano Arca, Vito Lippolis, Anna Pintus, Yury Torubaev, Enrico Podda
Summary: The experimental structural features of over 34,000 linear fragments involving chalcogen bonding (ChB) interactions were analyzed. The role of the chalcogen, the covalently bonded atoms, and the chalcogen bond acceptor were highlighted. An innovative approach for the evaluation and categorization of ChB strength based on structural data was proposed.
Article
Chemistry, Inorganic & Nuclear
Matthias A. Grasser, Tobias Pietsch, Eike Brunner, Michael Ruck
Summary: Ionic liquids (ILs), including task-specific ILs, have the ability to dissolve various solids at moderate temperatures without special reaction vessels. This study investigated the synthesis of sulfides of various elements in ILs as well as the dissolution of antimony sulfide in ILs. Additionally, a new quadruple heterocubane cation was discovered through the crystallization of Sb2S3 in a Lewis-acidic IL.
DALTON TRANSACTIONS
(2022)
Article
Materials Science, Multidisciplinary
Margaret Dawson, Caue Ribeiro, Marcio Raymundo Morelli
Summary: This study proposes cheaper and more stable tin (II) precursors for the synthesis of environmentally friendly substitute CH3NH3SnI3 to replace lead perovskite. The perovskite films synthesized using different precursors have similar structures but different morphologies. When using non-halide precursors, impurities such as sulfur and carbon need to be considered.
Article
Chemistry, Physical
Zhenyou Li, Alexander Welle, Smobin Vincent, Liping Wang, Stefan Fuchs, Sibylle Riedel, Ananyo Roy, Dasari Bosubabu, Juan Maria Garcia-Lastra, Maximilian Fichtner, Zhirong Zhao-Karger
Summary: A doping strategy is implemented in Ketjenblack sulfur cathodes by introducing selenium to enhance charge transfer and sulfur utilization. The S-Se composite cathodes exhibit better performance compared to bare sulfur cathodes, with improved efficiency and higher capacity. The use of these cathodes also enables a more uniform anode reaction and longer cyclability by suppressing polysulfide dissolution.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ralf Albrecht, Michael Ruck
Summary: The reaction of chalcogen dioxides with As2O3 in a high-temperature hydroflux solution resulted in the formation of potassium trichalcogenides crystals with dimensions up to 2 cm. The new heterochalcogenide anion was formed during the process. The reduced activity of water played a key role in the unexpected redox reaction and precipitation of hygroscopic compounds.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Ruiming Li, Fang Yao, Yalun Xu, Songxue Bai, Zhenglin Jia, Qianqian Lin
Summary: Germanium, indium gallium arsenide, indium antimonide, and mercury cadmium telluride dominate as short-wavelength infrared photo-sensing materials. However, their complex fabrication process and high production cost limit their widespread applications. Recent studies have shown that TexSe1-x has great potential for infrared photodetection, but the current devices suffer from high dark current and poor performance. In this work, high-quality TexSe1-x films were fabricated using thermal evaporation and low-temperature annealing, and the optoelectronic properties were systematically investigated and optimized. The resulting photodiodes based on the optimized TexSe1-x thin films exhibited high responsivity, reduced dark and noise current density, and a fast response time. Prototypical devices based on Te0.65Se0.35 thin films were successfully demonstrated for optical communications, showing the potential for low-cost short-wavelength infrared photodetection.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Coatings & Films
Derrick S. H. Liu, Maria Hilse, Roman Engel-Herbert
Summary: The sticking coefficients of selenium and tellurium were measured as a function of temperature, with both sharply dropping within a narrow temperature range. While the sticking coefficient of tellurium reached zero at high temperatures, selenium's coefficient remained around 0.2 even at elevated temperatures.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2021)
Article
Engineering, Environmental
B. Song, J. Weijma, C. J. N. Buisman, R. D. van der Weijden
Summary: This study investigates the interaction between biologically produced sulfur and selenium oxyanions during the bio-reduction process. The results show that the addition of biologically produced sulfur and sulfate promotes the bio-reduction of selenium oxyanions and accelerates the formation of hexagonal selenium. Hexagonal selenium is advantageous for separation and recovery and has lower mobility and toxicity compared to amorphous selenium.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Physical
Laura C. Pardo Perez, Alexander Arndt, Sasho Stojkovikj, Ibbi Y. Ahmet, Joshua T. Arens, Federico Dattila, Robert Wendt, Ana Guilherme Buzanich, Martin Radtke, Veronica Davies, Katja Hoeflich, Eike Koehnen, Philipp Tockhorn, Ronny Golnak, Jie Xiao, Goetz Schuck, Markus Wollgarten, Nuria Lopez, Matthew T. Mayer
Summary: The study focuses on the application of Cu-Sn bimetallic catalysts in selective CO2 conversion, exploring the synergistic mechanism between Cu and Sn and discovering significant differences in Sn content and speciation between different catalyst types, further elucidating the role of Sn in CO and formate selectivity.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Alfredo Mameli, James D. Parish, Tamer Dogan, Gerwin Gelinck, Michael W. Snook, Andrew J. Straiton, Andrew L. Johnson, Auke J. Kronemeijer
Summary: Spatial atomic layer deposition (sALD) of p-type SnO was achieved using a new liquid ALD precursor, Sn(TAA)2, and H2O as the coreactant. This process showed a higher deposition rate compared to conventional temporal ALD. Thin film transistors (TFTs) fabricated using this method exhibited good linear mobilities and on/off-current ratios, making it a significant step towards high-throughput p-type TFT fabrication on large area and flexible substrates.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Engineering, Chemical
Elinor T. Vokes, Ernie R. Lewis, Andrew L. Johnson, Michael Cotterell
Summary: This study accurately measured the density of dry internally mixed particles and found significant deviations from ideal mixing, with accuracies and precisions of approximately 5% and 1% respectively. The use of RK polynomials to describe volume changes in mixing was effective in explaining non-ideal mixing.
AEROSOL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Inorganic & Nuclear
Andrew J. Straiton, Claire L. McMullin, Gabriele Kociok-Koehn, Catherine L. Lyall, James D. Parish, Andrew L. Johnson
Summary: Analogous to alkoxide ligands, metal boroxide and boryloxy complexes are a lesser studied type of hard anionic O- ligands. A new series of amine-stabilized Li, Sn(II), and Zn boryloxy complexes with electron-rich tetrahedral boron centers were synthesized and characterized. The complexes were characterized using 1D, 2D, and DOSY NMR, and solid-state structures were determined via single-crystal X-ray diffraction. The amine-stabilized boryloxy ligand showed enhanced x-donor ability due to electron donation from the amine functionality into the p-orbital of the boron atom, as evidenced by computational quantum chemical studies.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Markus Schleuning, Moritz Koelbach, Ibbi Ahmet, Raphael Praeg, Ronen Gottesman, Rene Gunder, Mengyuan Zhang, Dan Ralf Wargulski, Daniel Abou-Ras, Daniel A. Grave, Fatwa F. Abdi, Roel van de Krol, Klaus Schwarzburg, Rainer Eichberger, Dennis Friedrich, Hannes Hempel
Summary: Metal oxides are commonly used as photoelectrode candidates for solar water splitting. However, their power conversion efficiencies are often hindered by poor charge transport. In this study, several metal oxides were compared to understand their thermalization, trapping, localization, and recombination kinetics. It was found that carrier localization and low mobilities were common issues, and annealing in H-2 was effective in reducing carrier localization and improving charge transport.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Andrew J. Straiton, James D. Parish, Joshua J. Smith, John P. Lowe, Andrew L. Johnson
Summary: A series of zinc phosphate complexes supported by nitrogen donor-base ligands were synthesized and their molecular structures were determined in both solid and solution states. The complexes showed polymeric and bimetallic structures, with some undergoing monomer-dimer equilibrium in solution. 1H DOSY experiments were conducted to measure the diffusion coefficients of the complexes and approximate the thermodynamic parameters of the monomer-dimer equilibria. One complex maintained its monomeric structure in the solid state, while another existed as both bimetallic species and free ligand in solution.
INORGANIC CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Keisuke Obata, Michael Schwarze, Tabea A. Thiel, Xinyi Zhang, Babu Radhakrishnan, Ibbi Y. Ahmet, Roel van de Krol, Reinhard Schomaecker, Fatwa F. Abdi
Summary: With the increasing pressure to decarbonize, green hydrogen is seen as a key component in the future energy infrastructure. Coupling solar water splitting with chemical reactions can improve reaction stability and flexibility, while reducing energy loss.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Kerry R. Flanagan, James D. Parish, Gabriele Kociok-Koehn, Andrew L. Johnson, Laszlo Kotai
Summary: The reactivity of the racemic N-heterocyclic stannylene with chalcogenide elements (O-2, S, Se, and Te) was studied. The reaction with molecular oxygen yielded a cyclic tristannoxane complex, while reactions with S, Se, and Te produced cyclo-distannachalcogenide complexes. NMR studies confirmed the formation of symmetric assemblies, and single crystal X-ray diffraction was used to determine the molecular structures of the products.
Article
Materials Science, Multidisciplinary
Thom R. Harris-Lee, Enrico Della Gaspera, Frank Marken, Jie Zhang, Cameron L. Bentley, Andrew L. Johnson
Summary: Aerosol-assisted chemical vapor deposition (AACVD) was used to fabricate highly nanostructured mixed anatase-rutile phase TiO2 using new and bespoke precursors. The precursor syntheses involved two steps and the suitability for AACVD was assessed using thermogravimetric analysis. The resulting TiO2 films showed exceptional OH- oxidation performance and promise for use in photoanodes for water splitting applications.
MATERIALS ADVANCES
(2023)
Article
Materials Science, Multidisciplinary
Daisy E. Gomersall, Kham M. Niang, James D. Parish, Zhuotong Sun, Andrew L. Johnson, Judith L. MacManus-Driscoll, Andrew J. Flewitt
Summary: This study demonstrates p-type SnO thin film transistors fabricated via atomic layer deposition (ALD) using Sn(II) alkoxide precursor. The optimization of deposition includes using multiple Sn pulses per ALD cycle and an exposure mode to increase residence time. Post-deposition annealing and back-channel passivation using ALD Al2O3 were also employed to improve device performance. The comparison of different precursor delivery modes shows that deposition with multiple Sn pulses and annealing at 250°C achieves high on/off ratio and field effect mobility.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
Gumaa A. El-Nagar, Fan Yang, Sasho Stojkovikj, Stefan Mebs, Siddharth Gupta, Ibbi Y. Ahmet, Holger Dau, Matthew T. Mayer
Summary: This study investigated the surface composition of Cu-In and Cu-Sn bimetallic catalysts and their impact on product selectivity during CO2 reduction, revealing that Cu-rich catalysts mainly produce CO, while Cu-poor catalysts mainly produce HCOO-. The speciation of Sn and In at the surface was found to influence the predominant product, with differences in the reducibility of Sn and In species. Operating surface-enhanced Raman spectroscopy measurements provided insights into the transformation of oxidized Cu surface species into Cu(OH)2 and basic Cu carbonates under CO2 electrolysis, shedding light on the switch in selectivity between CO and HCOO- pathways at Cu bimetallic catalysts.
Article
Chemistry, Inorganic & Nuclear
Hannah S. Sullivan, Andrew J. Straiton, Gabriele Kociok-Kohn, Andrew L. Johnson
Summary: A new series of tin(II) complexes were successfully synthesized by using hydroxy functionalized pyridine ligands. Some of these complexes exhibit oligomerization behavior, with dynamic equilibria between dimeric and tetrameric species at different temperatures.
Article
Chemistry, Physical
Laura C. Pardo Perez, Zora Chalkley, Robert Wendt, Ibbi Y. Ahmet, Markus Wollgarten, Matthew T. Mayer
Summary: This study presents a wet chemical method to synthesize nickel-indium mixed oxide thin films and shows that these films can achieve high CO selectivity in CO2 electroreduction. Detailed investigation reveals that the structure of the films undergoes significant changes depending on the applied bias and electrolysis time, which strongly affects the CO selectivity.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Markus Schleuning, Ibbi Y. Ahmet, Roel van de Krol, Matthias M. May
Summary: Direct photoelectrochemical solar water splitting has the potential to be a key element in sustainable energy supply, but metal oxide-based integrated systems still lack high efficiencies. The appropriate design of semiconductor-catalyst and semiconductor-electrolyte interfaces is crucial for achieving higher solar-to-hydrogen efficiencies. Improved contact design should be a major research direction to enhance the performance of PEC devices.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Chemistry, Multidisciplinary
Thom R. Harris-Lee, S. Andrew L. Johnson, Lina Wang, Philip J. Fletcher, Jie Zhang, Cameron Bentley, Christopher R. Bowen, Frank Marken
Summary: Water splitting by photocatalysis, particularly using seawater or wastewater, has the potential to play a significant role in the future hydrogen economy. This study explores the use of newly developed 3D metal-wire substrates as photoactive electrodes for photoelectrochemical processes. Titanium microwires with a rutile TiO2 nanocrystal coating are demonstrated to produce effective photoanodes, with adjustable lengths of TiO2 rods. The study also highlights the effectiveness of vacuum annealing in enhancing TiO2 photochemical processes and assesses the formation of oxygen and chlorine in electrolyte media.
NEW JOURNAL OF CHEMISTRY
(2022)
