Article
Chemistry, Physical
Matthias Felischak, Tanya Wolff, Leo Alvarado Perea, Andreas Seidel-Morgenstern, Christof Hamel
Summary: Different metathesis catalysts were evaluated for propene production. The Re and NiRe based catalysts showed good activity and high propene selectivity at moderate temperatures, while the tungsten-based catalysts required higher temperatures for activity. Among them, Re/AlMCM-41(60), NiRe/mix (1:1) and W/SiO2 catalysts exhibited propene selectivity exceeding 40% and high potential for propene synthesis.
Review
Chemistry, Multidisciplinary
Maciej D. Korzynski, Christophe Coperet
Summary: One of the goals of modern catalysis science is to form single-site catalysts with uniform structure and identical affinity. Achieving such characteristics is challenging due to the complexity of surface chemical reactions. Surface organometallic chemistry has emerged as an effective method for forming well-defined species.
TRENDS IN CHEMISTRY
(2021)
Review
Chemistry, Inorganic & Nuclear
Pavel A. Zhizhko, Nikolai S. Bushkov, Andrey Pichugov, Dmitry N. Zarubin
Summary: The review summarizes literature examples of stoichiometric oxo/imido heterometathesis reactions and discusses the current progress in catalytic oxo/imido heterometathesis development, with a focus on preparing highly efficient catalysts based on silica-supported early transition metal oxo and imido complexes using Surface Organometallic Chemistry approach.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Physical
Anne V. Le, Biplab Rajbanshi, Raul F. Lobo, Peng Bai
Summary: In this study, DFT calculations were used to investigate the mechanisms of propene metathesis catalyzed by WOx/SiO2. The results showed that there are still many mechanisms of heterogeneous catalyzed metathesis reactions that are not well understood. The pseudo-Wittig mechanism was found to be the most favorable method for generating initial alkylidene active sites. The allylic and vinylic C-H activations are more difficult and require the reduction of surface sites to W(+4).
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Physical
Didier Astruc, Guy Bertrand, Mohamed Eddaoudi, Yu Han, Kuo-Wei Huang, Johannes Lercher, Catherine Santini, Kazuhiro Takanabe, Mostafa Taoufik, Luigi Cavallo
Summary: This article discusses the contributions of Jean-Marie Basset in the field of catalysis. He introduced the approach of molecular organometallic chemistry to the study of supported catalysts, established the field of surface organometallic chemistry, and significantly improved numerous known reactions while also discovering new ones.
Article
Chemistry, Physical
Yibo Yang, Gaolei Qin, Anping Yin, Yuhang Cai, Ziyu Zhou, Nengfeng Gong, Xiangjie Zhang, Tao Yan, Gengzhe Song, Xiaodong Sun, Hongliu Wan, Yong Yang, Yongwang Li, Zhi Cao
Summary: In this study, the sluggish reaction rates of the cross-metathesis of ethene and 2-butene to produce propene over a supported rhenium-based catalyst were improved through electronic modulation and selective adsorption of olefins. The boron-modified Re-2B/Al2O3 catalyst exhibited superior intrinsic activity, resulting in over 19-fold increase in propene yield compared to the un-promoted Re-Al2O3 catalyst.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Review
Chemistry, Multidisciplinary
Chiara Bisio, Fabio Carniato, Matteo Guidotti
Summary: This review provides an overview of the use and role of coordination complexes as precursors for the generation of hybrid catalysts in oxidation reactions for fine chemical synthesis. The understanding of active site formation in hybrid catalysts is emphasized, and different families of coordination precursors are considered. Each example includes a brief analysis of synthesis, characterization, and catalytic performance. Special attention is given to the chemical environment of the active metal center's first coordination sphere. By integrating advantages of both homogeneous and heterogeneous systems, catalysts obtained through heterogenization, grafting, or anchoring of homogeneous catalysts exhibit enhanced catalytic performance. Deposition of coordination complexes onto preformed supports offers a versatile strategy for designing novel catalysts with tailored and controlled properties.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Darryl F. Nater, Maxime Boudjelel, Lukas Laetsch, Richard R. Schrock, Christophe Coperet
Summary: Tungsten oxo adamantylidenes are a new class of easily accessible alkylidenes, which can be used to evaluate a wider range of molecular and supported olefin metathesis catalysts. The high thermal stability of the perfluoro-tert-butoxide complex, even in its dimer form, allows for grafting through sublimation. Evaluation of these supported species using standardized protocols demonstrates their high activity toward internal and terminal olefins.
HELVETICA CHIMICA ACTA
(2022)
Review
Chemistry, Multidisciplinary
Marta Estrader, Katerina Soulantica, Bruno Chaudret
Summary: This article discusses the synthesis of magnetic metal nanoparticles using organometallic precursors, as well as their properties and potential applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Review
Chemistry, Multidisciplinary
Paolo Destito, Cristian Vidal, Fernando Lopez, Jose L. Mascarenas
Summary: Developing non-natural biocompatible transformations in biologically relevant media has attracted significant interest in the past decade, with the use of transition metal complexes offering unique possibilities. This translation of metal catalyst potential to biological environments poses challenges, but describing the most relevant advances and key challenges helps identify issues from an organometallic perspective.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Review
Chemistry, Multidisciplinary
Robin N. Perutz, Sylviane Sabo-Etienne, Andrew S. Weller
Summary: This article introduces the concept of sigma-CAM and a new approach to reaction mechanisms. It focuses on the characteristics and dynamic rearrangements of sigma-bond complexes, providing examples of the sigma-CAM mechanism supported by experimental and computational evidence. The authors also critically compare alternative mechanisms for metathesis of metal-element bonds.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Review
Chemistry, Inorganic & Nuclear
Elena Bekyarova, Matthew P. Conley
Summary: Understanding the interaction between ligands and metals is essential in inorganic chemistry. This article focuses on the coordination complexes formed between extended surface ligands and metals.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Physical
Alexander Kravchenko, Brian J. J. Timmer, A. Ken Inge, Maurice Biedermann, Olof Ramstrom
Summary: A series of olefin metathesis catalysts bearing cyclic (alkyl)(amino)carbene (CAAC) ligands of varying size and steric demand have been synthesized and evaluated for their performance in ring-closing, self, and cross-metathesis reactions. These catalysts exhibit high stability and activity, making them potentially valuable in the screening of bioactive compounds.
Article
Chemistry, Physical
Catriona C. James, Petrus C. M. Laan, Bas de Bruin, Joost N. H. Reek
Summary: Olefin metathesis catalysts, such as AquaMet, are susceptible to decomposition under biologically relevant conditions. Current stabilizing strategies have limited applicability under these conditions. Encapsulation of AquaMet within a supramolecular metallocage, with nitrate counterions, enhances the catalyst activity. Replacement of AquaMet's chloride ligands with nitrates through simple anion-exchange leads to higher yields of ring-closed product under aqueous and biological conditions. This kinetic protection strategy of transition metal catalysts may find applications in other in vivo catalytic reactions.
Article
Chemistry, Multidisciplinary
Jordan Meyet, Anton Ashuiev, Gina Noh, Mark A. Newton, Daniel Klose, Keith Searles, Alexander P. van Bavel, Andrew D. Horton, Gunnar Jeschke, Jeroen A. van Bokhoven, Christophe Coperet
Summary: The study reports the formation of well-dispersed monomeric Cu-II species supported on alumina using surface organometallic chemistry, and their reactivity towards the selective and stepwise conversion of methane to methanol. Extensive studies show that active sites are associated with specific facets in gamma- and eta-alumina phase, with an EPR signature attributed to species having a tri-coordinated T-shape geometry. Overall, the selective conversion of methane to methanol involves two monomeric Cu-II sites playing in concert.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Polymer Science
Daniel Subervie, Frederic Le Quemener, Remi Canterel, Pierre-Yves Dugas, Olivier Boyron, Jacques Lalevee, Elodie Bourgeat-Lami, Muriel Lansalot, Emmanuel Lacote
Summary: This study reports on the emulsion photopolymerization of acrylate and methacrylate monomers under visible light using a disulfide photoinitiating system. The simplified boron-based system was efficient in initiating polymerization reactions and producing latexes with different particle sizes. Furthermore, the method allows for the production of random copolymer latexes with temporal control of the polymerization process.
Article
Chemistry, Physical
Rohit K. Rai, Walid Al Maksoud, Natalia Morlanes, Moussab Harb, Rafia Ahmad, Alessandro Genovese, Mohamed N. Hedhili, Luigi Cavallo, Jean-Marie Basset
Summary: Introducing cobalt into iron catalysts significantly enhances the efficiency of ammonia synthesis, especially exhibiting excellent activity at low temperatures. The study reveals a tuning effect on the surface of the catalyst by introducing cobalt, weakening NHx retarding species and making the iron sites more favorable for N-2 activation.
Editorial Material
Engineering, Chemical
Christopher P. Nicholas
Summary: Since 1970, Earth Day has been celebrated annually to commemorate the start of the modern environmental movement. Scientists have made contributions to technology development, which has been a source of pollution but also led to significant progress in pollution reduction. This article focuses on the causes of air pollution and the discoveries made by Arie Jan Haagen-Smit to understand the cause of smog. His work was followed by other scientists who invented technologies, such as the three-way catalytic converter, to mitigate air pollution. Ongoing research in this field includes exploring new developments in methane remediation.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Theodore Olla, Ribal Jabbour, Amina Labiod, Olivier Boyron, Stephane Mery, Benoit Heinrich, Thomas Heiser, Denis Jacquemin, Patrick Leveque, Anne Lesage, Nicolas Leclerc
Summary: In this study, solid-state nuclear magnetic resonance (NMR) under magic angle spinning (MAS) is explored as a tool to investigate the local structure and supramolecular organization of a series of conjugated polymers. The molecular conformation of these polymers in relation to their chemical composition is successfully determined through a comprehensive study using complementary techniques.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Polymer Science
Gisele Usanase, Frederic Fraisse, Manel Taam, Olivier Boyron
Summary: The relationship between structure and properties of materials is crucial in polymer science. This study introduces a simple rheological method to estimate short chain branching (SCB) in linear low-density polyethylene (LLDPE), which can greatly impact its properties.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2022)
Proceedings Paper
Polymer Science
Pilar del Hierro, Olivier Boyron, Alberto Ortin
Summary: The determination of solution viscosity of polymeric materials plays a crucial role in the industry, by estimating molar mass and providing valuable information on the physical properties of polymers. The method of dilute solution viscosity measurements has been traditionally used for specifying and controlling production grades.
MACROMOLECULAR SYMPOSIA
(2022)
Article
Nanoscience & Nanotechnology
Qiankun Hou, Kang Liu, Walid Al-Maksoud, Yuchang Huang, De Ding, Yongpeng Lei, Yi Zhang, Bin Lin, Lirong Zheng, Min Liu, Jean-Marie Basset, Yin Chen
Summary: Nonprecious-metal heterogeneous catalysts with atomically dispersed active sites have shown high activity and selectivity in various reactions, but their rational design and large-scale synthesis pose a significant challenge. Current approaches involve high temperatures and tedious procedures. In this study, a straightforward and scalable strategy was demonstrated for synthesizing atomically dispersed Ni electrocatalysts in a large quantity with high yield, using two simple steps under mild conditions. The resulting catalyst exhibits excellent catalytic performance in both oxygen evolution and reduction reactions, with tunable activity, high reproducibility, and stability. The strategy provides a practical and green method for the industrial manufacturing of nonprecious-metal single-site catalysts with predictable structures.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Editorial Material
Engineering, Chemical
Christopher P. Nicholas
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Killian Onida, Mohamad Fayad, Sebastien Norsic, Olivier Boyron, Nicolas Duguet
Summary: The chemical depolymerisation of poly(bisphenol A carbonate) (BPA-PC) was studied using alpha-hydroxyketones as nucleophiles to give bisphenol A as the monomer and vinylene carbonates as co-products. 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) was found to be an efficient organocatalyst for this reaction. Various alpha-hydroxyketones were investigated as substrates, leading to the synthesis of different vinylene carbonates with moderate to high yields. This method also demonstrated the ability to produce vinylene carbonates from waste polycarbonate materials.
Article
Chemistry, Multidisciplinary
Lea Vilcocq, Nicolas Chaussard, Antonio Hernandez Manas, Olivier Boyron, Manel Taam, Frederique Bertaud, Pascal Fongarland, Laurent Djakovitch
Summary: In this study, it was found that industrial kraft black liquor from maritime pine can be oxidised in aqueous, alkaline medium to produce a variety of compounds, including phenolics, aliphatic acids, and oxidised lignin. The presence of a catalyst promoted the formation of phenolics and aliphatic acids. This work presents the first catalytic process for the chemical valorisation of kraft black liquor.
Article
Chemistry, Multidisciplinary
Yutong Pang, ChoongSze Lee, Bess Vlaisavljevich, Christopher P. Nicholas, Paul J. Dauenhauer
Summary: Dehydration of methyl lactate to acrylic acid and methyl acrylate was efficiently achieved over a Na-FAU zeolite catalyst impregnated with multifunctional diamines. 12BPE and 44TMDP with a loading of 40 wt% or two molecules per Na-FAU supercage showed a dehydration selectivity of 96%, with 44TMDP achieving the highest reported yield of 92% at a selectivity of 96% by tuning the weighted hourly space velocity.
Article
Polymer Science
L. Sinniger, O. Boyron, P. Y. Dugas, G. Patias, D. Lester, D. M. Haddleton, V. Monteil, M. Lansalot, F. DAgosto
Summary: PMMA-b-PE block copolymers were obtained by involving ω-unsaturated PMMA oligomers prepared by emulsion CCTP as seeds in the radical emulsion polymerization of ethylene in water, leading to the formation of stable latexes composed of faceted spherical particles.
Article
Chemistry, Multidisciplinary
Lujain Alrais, Walid Al Maksoud, Baraa Werghi, Anissa Bendjeriou-Sedjerari, Edy Abou-Hamad, Mohamed N. Hedhili, Jean-Marie Basset
Summary: The synthesis of heterogeneous Ti(iv)-based catalysts for ethylene polymerization according to the concepts of surface organometallic chemistry is described. These catalysts utilize a unique silica support with a 3D fibrous morphology and an aluminum-bound hydroxyl group. The combination of morphological and electronic properties of the support leads to enhanced catalytic performance in ethylene polymerization, resulting in the formation of high-density polyethylene.
CHEMICAL COMMUNICATIONS
(2023)
Article
Polymer Science
Florian Baffie, Olivier Boyron, Muriel Lansalot, Vincent Monteil, Franck D'Agosto
Summary: Iodine transfer polymerization was used to produce polyethylene and poly(ethylene-co-vinyl acetate). A comparison of the kinetics and structures of the polymers formed using different iodine and di-iodo chain transfer agents showed that the iodine transfer polymerization method allows for good control of the polymerization process.
Article
Materials Science, Multidisciplinary
Bharath Dyaga, Sasikumar Mayarambakam, Olzhas A. Ibraikulov, Nicolas Zimmermann, Sadiara Fall, Olivier Boyron, Thomas Heiser, Nicolas Leclerc, Nicolas Berton, Bruno Schmaltz
Summary: In this study, two new polymers were synthesized with enhanced backbone planarity and quinoidal character, leading to a decreased bandgap and improved optoelectronic properties.
MATERIALS ADVANCES
(2022)
Article
Chemistry, Physical
Yifan Sun, Ye Lv, Wei Li, Jinli Zhang, Yan Fu
Summary: In this study, PtRu electrocatalysts were fabricated on carbon paper via cyclic electrodeposition for the electrocatalytic hydrogenation (ECH) of phenol. The Pt3Ru3 catalyst exhibited excellent activity and stability for the conversion of phenol to cyclohexanol at ambient temperature and various current densities. The in situ Raman spectroscopy and kinetic study revealed the hydrogenation mechanism of phenol over Pt3Ru3 in acidic electrolyte, providing an effective electrochemical strategy for the facile construction of durable electrode materials and efficient phenol hydrogenation.
JOURNAL OF CATALYSIS
(2024)
Article
Chemistry, Physical
Amir Shahzad, Khezina Rafiq, Muhammad Zeeshan Abid, Naseem Ahmad Khan, Syed Shoaib Ahmad Shah, Raed H. Althomali, Abdul Rauf, Ejaz Hussain
Summary: Photocatalytic hydrogen production through water splitting is an effective method for meeting future energy demands. In this study, researchers synthesized a 1 % Ag2S/Cu2S co-doped CdZnS catalyst and found that it can produce hydrogen at a higher rate. The co-doping of Ag2S and Cu2S in the CdZnS catalyst showed a synergistic effect, with Ag2S promoting oxidation reactions and Cu2S promoting reduction reactions.
JOURNAL OF CATALYSIS
(2024)
