Article
Chemistry, Multidisciplinary
Shuang-Shuang Ma, Rui Sun, Zi-Heng Zhang, Peng-Xin Guan, Jin-Qing Lin, Chun-Shan Li, Bao-Hua Xu
Summary: A novel half-sandwich phosphinesulfonate cobaltic complex was prepared and used for the chemoselective N,N-dimethylation of nitroaromatics. The catalytic activity could be modulated by using specific hydrosilanes.
Article
Chemistry, Multidisciplinary
Shiqun Xiang, Weibin Fan, Wei Zhang, Yinghua Li, Shiwei Guo, Deguang Huang
Summary: A simple and green method for the synthesis of fused pyridines was developed using the [2 + 2 + 1 + 1] cycloaddition of ketones with an ammonium cation under a CO2 atmosphere. Monoethanolamine (MEA) was used as an additive to increase the solubility of CO2 in an aqueous solution. The products, exhibiting photosensitivity, show potential applications as organic optoelectronic materials, with a proposed reaction mechanism based on experimental studies.
Article
Chemistry, Physical
Pengbo Wang, Qian He, Hao Zhang, Qingdi Sun, Yujie Cheng, Tao Gan, Xiaohui He, Hongbing Ji
Summary: A simple and commercially available ZnO catalyst was used for selective N-formylation of amines under mild conditions in this study, resulting in high-yielding products with good recyclability and wide substrate scope. This method has the potential to promote fine chemical synthesis and CO2 capture.
CATALYSIS COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Kgomotso G. Mabena, Edward Ocansey, Henok H. Kinfe, Banothile C. E. Makhubela
Summary: This study reports newly synthesized SN2S and SeN2Se tridentate platinum(II) and palladium(II) pincer complexes that serve as pre-catalysts in the hydrogenation of carbon dioxide to formate. These molecular catalysts are active in forming industrially valuable chemical intermediates and provide a stable framework for the catalytic cycles. Palladium(II) catalysts achieved TONs as high as 1881, while SeN2Se platinum(II)-based catalysts catalyzed the hydrogenation of CO2 to formate at TONs of 550, 421, and 1254, respectively.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Chemistry, Multidisciplinary
Xingchao Dai, Teng Li, Bin Wang, Carsten Kreyenschulte, Stephan Bartling, Shujuan Liu, Dongcheng He, Hangkong Yuan, Angelika Brueckner, Feng Shi, Jabor Rabeah, Xinjiang Cui
Summary: Heterogeneously catalyzed N-formylation of amines to formamide with CO2/H2 is efficiently achieved using mixed valence catalysts containing Cu2O/Cu interface sites, which play a vital role in the excellent catalytic activity by assisting in the formation of O-inter-H moieties.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Multidisciplinary Sciences
Antonio Santoro, Ambra M. Cancelliere, Kei Kamogawa, Scolastica Serroni, Fausto Puntoriero, Yusuke Tamaki, Sebastiano Campagna, Osamu Ishitani
Summary: Two new supramolecular photocatalysts, containing Ru(II) polypyridine units as light-harvesting photosensitizers and Re(I) polypyridine subunits as catalytic centers, have been prepared. These new species exhibit efficient and selective CO2 photoreduction capabilities. Comparisons between these new species and their parent compounds allow researchers to investigate the effect of the CO(2)TEOA insertion process and the presence of chloride ions on photocatalytic processes. The results suggest the utility of preparing supramolecular photocatalysts with preformed adducts.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Organic
Qin Shi, Haiyan Hu, Minxing Du, Yajun Sun, Yudong Li, Yuehui Li
Summary: In this study, CO2/H2 was used as a methylation reagent for selective C-H methylation of heteroarenes. The reaction was catalyzed by cobalt/B(C6F5)3, and the Lewis acidic additive B(C6F5)3 played a crucial role in achieving good reactivity. The reaction proceeds via CO2 reduction, C-C bond formation, and reduction. Water is the only byproduct of this environmentally friendly alternative for C-H methylation.
Article
Engineering, Chemical
Sihan Liu, Miaomiao Song, Xingwen Cha, Siyuan Hu, Dongren Cai, Wen Li, Guowu Zhan
Summary: Thermal reduction of CO2 by green H-2 is an effective strategy for CO2 utilization. In this study, hollow mesoporous nickel phyllosilicate was used as a catalyst for CO2 hydrogenation. It was found that functionalization of graphene oxide on the catalyst can adjust the CO / CH4 ratio and increase the yield of CO products.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Jessica Michalke, Kirill Faust, Thomas Bogl, Stephan Bartling, Nils Rockstroh, Christoph Topf
Summary: In this study, the assembly of a Ce-promoted Ni-based solid composite catalyst for the hydrogenation of nitroarenes was communicated. The catalyst showed advantages such as simple preparation, operational simplicity, and easy separation and recycling.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Editorial Material
Chemistry, Multidisciplinary
Joakim B. Jakobsen, Magnus H. Ronne, Kim Daasbjerg, Troels Skrydstrup
Summary: The reduction of carbon dioxide is crucial for producing non-fossil-fuel-based feedstocks and mitigating greenhouse gas emissions. Amines play a critical role in these transformations, acting as CO2 trapping agents, proton shuttles, electron donors, and facilitators of CO2 reductions through formamide derivatives.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Ziliang Yuan, Guanghui Wang, Xun Li, Yurong He, Pan Wang, Francesco Mauriello, Zehui Zhang
Summary: Ni nanoparticle catalysts supported on Vulcan carbon (VCX) were prepared and used for the acceptorless dehydrogenation of primary amines to secondary amines. The best performance was achieved with Ni(A)/VXC with Ni particle size of 11.9 nm at 150 degrees C. This work provides inspiration for further investigation into acceptorless dehydrogenation using non-noble metal catalysts.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Physical
Chenxi Song, Linjie Gao, Mengqi Wu, Dachao Yuan, Xiaoxiao Kang, Ruqian Lian, Xingyuan San, Yaguang Li
Summary: In this study, theoretical calculations are used to predict and experimental verification shows that Ni single atom catalysts exhibit high selectivity and activity for CO2 hydrogenation. The synthesized Ni single atom catalyst supported on CeO2 nanosheets demonstrates 100% CO selectivity and high CO production rate. Furthermore, solar heating conversion device is utilized to achieve solar-driven CO2 hydrogenation with 100% CO selectivity.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
David Decker, Zhihong Wei, Jabor Rabeah, Hans-Joachim Drexler, Angelika Brueckner, Haijun Jiao, Torsten Beweries
Summary: In this study, a Co(ii) PNNH pincer catalyst system was applied for the highly E-selective transfer semihydrogenation of internal diaryl alkynes. The catalyst system showed high activity, short reaction times, and operated under mild conditions.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Physical
Gabriela Gastelu, David Savary, Martin Hulla, Daniel Ortiz, Jorge G. Uranga, Paul J. Dyson
Summary: The article introduces an alternative reaction pathway for the O-formylation of alcohols and bio-alcohols, which produces industrially relevant formate esters. The reaction is catalyzed by formic acid, which can be produced from CO2 captured in the reaction. The in situ produced formic acid improves the reaction rate, and each catalyst can be recycled for reuse.
Article
Multidisciplinary Sciences
Matthias S. Frei, Cecilia Mondelli, Rodrigo Garcia-Muelas, Jordi Morales-Vidal, Michelle Philipp, Olga V. Safonova, Nuria Lopez, Joseph A. Stewart, Daniel Curulla Ferre, Javier Perez-Ramirez
Summary: This study investigates the complex interplay between nanostructure and product selectivity of nickel-promoted In2O3 in CO2 hydrogenation to methanol. The presence of nickel on the oxide surface forms InNi3 patches, which boost methanol production by providing neutral hydrogen species. Ratios of nickel to In content influence the formation of different structures and the production of CO and methane in the reaction.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Yingjie Li, Haiyu Chang, Hui Yan, Senlin Tian, Philip G. Jessop
Summary: In this study, the use of N,N-dimethylcyclohexylamine as a switchable-hydrophilicity solvent for the absorption of toluene showed excellent performance in separation processes. By bubbling CO2 and N-2, efficient desorption and separation were achieved, and the absorption capacity of the solvent remained comparable even after multiple cycles. This innovative and reversible remediation strategy utilizing switchable-hydrophilicity solvents has the potential to be a more environmentally friendly and energy-efficient alternative to traditional absorbents for reducing VOC pollution.
Article
Chemistry, Multidisciplinary
Alexis Bordet, Sami El Sayed, Matthew Sanger, Kyle J. Boniface, Deepti Kalsi, Kylie L. Luska, Philip G. Jessop, Walter Leitner
Summary: This study reports the preparation of a catalytic system designed to respond adaptively to feed gas composition in hydrogenation reactions. Ruthenium nanoparticles immobilized on amine-functionalized polymer-grafted silica act as active and stable catalysts for the hydrogenation of biomass-derived furfural, acetone, and related substrates. The formation of alkylammonium formate species at the amine-functionalized support triggers the selectivity switch in the catalytic reaction, with the catalyst performance responding almost in real time to the feed gas composition.
Article
Engineering, Chemical
Michael F. Cunningham, Philip G. Jessop
Summary: This article reviews the principles of CO2 switching and its applications in various materials and processes. It also highlights the recent research conducted on new switchable polymers and related processes, emphasizing the potential opportunities and solutions that CO2 switching may offer for commercial development.
MACROMOLECULAR REACTION ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Yuyan Zhang, Sami El Sayed, Liqun Kang, Matthew Sanger, Thomas Wiegand, Philip G. Jessop, Serena Debeer, Alexis Bordet, Walter Leitner
Summary: Ruthenium nanoparticles immobilized on an amine-functionalized polymer-grafted silica support can selectively catalyze the hydrogenation of bicyclic heteroaromatics. The addition of CO2 to the hydrogen gas phase can effectively shut down the arene hydrogenation reaction while maintaining activity for heteroaromatic hydrogenation. This selectivity switch is achieved through the catalytic generation of ammonium formate species on the material's surface by hydrogenation of CO2. By altering the composition of the feed gas, a variety of benzofuran and quinoline derivatives can be selectively hydrogenated to fully or partially saturated products using a single catalyst.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Vanessa Saab Liberato, Tatiana Felix Ferreira, Alex Redmond MacDonald, Bernardo Dias Ribeiro, Maria Alice Zarur Coelho, Philip G. Jessop
Summary: PDO can be produced by fermenting glycerol, but separating it from the aqueous medium is difficult. A new method called Solvent-Assisted Switchable Water (SASW) is proposed. In this method, a hydrophilic solvent is used to extract PDO from water, while a CO2-switchable ionogen prevents the solvent from merging with the aqueous phase. The extraction yield was 73%, but the extracted PDO contained water and amine, indicating that further improvement is needed for selective extraction.
Review
Chemistry, Multidisciplinary
Ross D. D. Jansen-van Vuuren, Sina Naficy, Maedeh Ramezani, Michael Cunningham, Philip Jessop
Summary: CO2-responsive materials undergo changes in their properties when CO2 is introduced or removed. CO2 is advantageous as a stimulus due to its abundance, benign nature, affordability, and lack of accumulation in a system. Various CO2-responsive materials such as polymers, latexes, surfactants, and catalysts have been explored. CO2-responsive gels, a subset of CO2-responsive polymers, have unique changes such as swelling or transformed morphology. This paper reviews the preparation, properties, and applications of CO2-responsive gels, including nanogels, microgels, aerogels, and macrogels, and also discusses CO2-induced self-assembled gels.
CHEMICAL SOCIETY REVIEWS
(2023)
Article
Chemistry, Physical
Robin R. Benedix, Sophia Botsch, Natalie Preisig, Volodymyr Kovalchuk, Philip G. Jessop, Cosima Stubenrauch
Summary: Switchable materials, especially CO2-switchable materials, are of great interest in environmental research. Replacing non-switchable materials with switchable counterparts has the potential to make processes more environmentally friendly by enhancing reusability and circularity, reducing energy costs and material consumption. This study focuses on the surface and foaming properties of aqueous solutions containing a non-switchable surfactant and a CO2-switchable additive. The results show that the additive can change surface properties, foamability, and foam stability when switched with CO2.
Article
Chemistry, Multidisciplinary
Philip G. Jessop, Alex R. Macdonald
Summary: The life cycle of a product contains hotspots, which are the steps causing the majority of harm. Traditional practice often overlooks the importance of identifying these hotspots. Therefore, the utilization of life cycle assessments to identify hotspots and drive the selection of research projects is necessary to maximize environmental benefits.
Article
Chemistry, Multidisciplinary
Michael F. Cunningham, Philip G. Jessop
Summary: The development and design of CO2-switchable colloidal particles were discussed, including the principles and recent progress in the preparation of various types of colloidal particles for different applications. Future opportunities in this field were also analyzed.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Igor T. Cunha, Meghan McKeeman, Maedeh Ramezani, Kayleigh Hayashi-Mehedy, Alana Lloyd-Smith, Marco Bravi, Philip G. Jessop
Summary: Volatile organic solvents are widely used in various industries, but their emissions, inhalation risks, and flammability pose significant concerns. Switchable-hydrophilicity solvents (SHS), which can switch between water-miscible and water-immiscible states, offer a solution to these issues. Anionic SHS (ASHS) systems, composed of hydrophobic carboxylic acid and water-soluble base, provide a new variation of SHS. This study reports the development of a low-toxicity SHS without the need for excess water, using branched carboxylic acids and substoichiometric amounts of NaHCO3 or NaOH.
Article
Chemistry, Multidisciplinary
Tamara M. de Winter, Jaddie Ho, Christopher J. Alridge, Philip G. Jessop
Summary: A new methodology for asymmetric hydrogenation of allylamines is proposed using a reversible reaction between amines and carbon dioxide (CO2) to suppress unwanted side reactions. The effects of various parameters on the enantioselectivity and conversion were studied, and it was found that the addition of base additives can improve the enantioselectivity and chemoselectivity of the reaction.
Article
Chemistry, Multidisciplinary
Bailey A. Smith, Pascale Champagne, Philip G. Jessop
Summary: The new method allows for high-yield CMF synthesis from fructose without chlorinated solvents, and can be extended to the synthesis of CMF from other feedstocks.
Article
Materials Science, Multidisciplinary
Ross D. Jansen-van Vuuren, Guilherme Drechsler Vilela, Maedeh Ramezani, Peter H. Gilbert, Danika Watson, Nathan Mullins, Allen K. Lucas, Alan Jeffrey Giacomin, Michael F. Cunningham, Philip G. Jessop
Summary: A CO2-responsive SAP hydrogel capable of switching between hydrophobic and hydrophilic states in the presence of CO2 has been reported. These hydrogels can absorb and release water with the presence or absence of CO2, demonstrating their reusability and potential for various applications.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Igor T. Cunha, Huilin Yang, Philip G. Jessop
Summary: Biomass conversion to organic products is crucial for a sustainable society, but current energy costs and environmental impacts, particularly in removing water, remain problematic. The new method of high pressure switchable water (HPSW) shows promise in more efficiently separating organic products from water by changing the polarity of organic liquids and utilizing CO2 pressure.
Article
Chemistry, Multidisciplinary
Sohaib Haseeb, Jesse R. Vanderveen, Devni Elamaldeniya, Jesse Harris, Kyle J. Boniface, Roland Lee, Pascale Champagne, Philip G. Jessop
Summary: The mixture of cyclohexyl methyl ethers prepared from Kraft lignin pyrolysis oil is a biomass-derived aliphatic solvent that is slightly more basic and polar compared to cyclopentyl methyl ether. Despite 12 weeks of exposure to air, neither the biomass-derived solvent nor pure cyclohexyl methyl ether formed any detectable peroxides, making it a potential replacement for THF and other solvents such as dioxane, ethyl acetate, acetone, and 2-butanone.
