Article
Chemistry, Multidisciplinary
Ondrej Mozdiak, Jiri Tydlitat, Zdenka Ruzickova, Libor Dostal, Roman Jambor
Summary: In this study, Ru complexes with N-bound 2-pyridonato ligand were prepared and their catalytic activity in base-free transfer-hydrogenation of ketones was investigated.
Article
Chemistry, Inorganic & Nuclear
Michael Doemling, Tom E. Stennett, Andrey Belyaev, Benjamin Hupp, Christina Claes, Stefan Ullrich, Sebastian Endres, Emely Freytag, Thomas Kramer, Thomas Kupfer, Fabian Schorr, Torsten Thiess, Merle Arrowsmith, Andreas Steffen, Holger Braunschweig
Summary: Nine different coinage metal pi complexes of diborenes with various anionic diborene and metal substituents were synthesized and characterized. Their optical properties were investigated to gain insights into the excited-state behavior and structure-property relationships. Structural and electronic modifications greatly influence the absorption, photostability, and quantum yields.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Ernest Ubasart, Irene Mustieles Marin, Juan Manuel Asensio, Gabriel Mencia, Angela M. Lopez-Vinasco, Cristina Garcia-Simon, Iker del Rosal, Romuald Poteau, Bruno Chaudret, Xavi Ribas
Summary: The synthesis of metallic nanoparticles with high surface area and controlled shape is crucial for improving their catalytic performance. In this study, a synthetic methodology for sub-nanometric Ru nanoparticles was developed using a tetragonal prismatic supramolecular nanocapsule. The catalytic properties of these sub-nanometric nanoparticles were tested and the encapsulation of [Ru-5] clusters inside the nanocapsule was observed. A thorough study enlightened the nature of the trapped clusters and proposed them as the first-grown seeds of subsequent formation of the subnanometric Ru nanoparticles. The double role of the nanocapsule in stabilizing nanoparticles and hosting ultra-small Ru clusters is unprecedented and may lead to the synthesis of ultra-small metallic clusters for catalytic purposes.
NANOSCALE HORIZONS
(2022)
Article
Chemistry, Multidisciplinary
Satoru Ikemoto, Takanori Koitaya, Yuta Tsuji, Mowpriya Das, Kazunari Yoshizawa, Frank Glorius, Satoshi Muratsugu, Mizuki Tada
Summary: A coordination-induced trigger for catalytic activity is proposed on an N-heterocyclic carbene (NHC)-decorated ceria catalyst incorporating Cr and Rh (ICy-r-Cr0.19Rh0.06CeOz). The ICy-bearing Rh nanoclusters were found to be the key active species, and the ICy controlled the adsorption sites of the phenyl group on the Rh nanocluster to promote the C-C bond formation.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Adrian Garcia-Zaragoza, Christian Cerezo-Navarrete, Andres Mollar-Cuni, Pascual Ona-Burgos, Jose A. Mata, Avelino Corma, Luis M. Martinez-Prieto
Summary: The catalytic properties of graphene-supported ruthenium nanoparticles have been adjusted by modifying their metal surface with pyrene-tagged N-heterocyclic-carbene ligands. The activity and selectivity of the catalyst are highly dependent on the surface coverage of the ligands, with higher coverage leading to lower activity but higher selectivity. The reactivity and stability of the catalysts can be controlled by modifying the surface with specific ligands.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Dong Luo, Tao Zuo, Ji Zheng, Zi-Hao Long, Xue-Zhi Wang, Yong-Liang Huang, Xiao-Ping Zhou, Dan Li
Summary: A stepwise reticular synthesis approach was used to construct a multicomponent MOF with orderly arranged chromophores, significantly improving the excited state properties of the material. DFT and TDDFT calculations suggest that synergistic charge transfer among different components in the MOF plays a crucial role in enhancing the optoelectronic properties of the material.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Physical
Chaofang Deng, Jiu Chen, Qing Tang
Summary: In this study, theoretical investigations were conducted to examine the binding of NHCMe ligands on different solid surfaces, revealing stronger adsorption on Pt (111) and Ti (0001) surfaces compared to the experimentally studied NHC-Au(111) interface. Furthermore, the distance of adatoms from the surface plays a crucial role in determining the molecular orientations of NHCMe, leading to different binding modes. These results suggest great promise for the design of stable NHC-based SAMs with attractive interface features beyond traditional coinage metals.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Inorganic & Nuclear
Rasika J. Kariyawasam, Ramin Zibaseresht, Matthew I. J. Polson, Joanna C. C. Houlihan, Jan L. Wikaira, Richard M. Hartshorn
Summary: Bis(bidentate) and bis(tridentate) Co(III) complexes of N-(2-hydroxyethyl)ethane-1,2-diamine (heen), 2[(2-aminoethyl)amino]ethan-1-olate (heen-H), or N-(2-chloroethyl)ethane-1,2-diamine (ceen) ligands have been synthesized and various reaction conditions have been established for their syntheses. They can all be ultimately derived from (OC-6-12)-[Co(heen)(2)(NO2)(2)]NO3 and provide access to the trans amine trans chloride nitrogen mustard complex, (OC-6-12)-[Co(ceen)(2)(Cl)(2)]Cl. Although complex isomeric mixtures were obtained from the reaction of (OC-6-12)-[Co(heen)(2)(NO2)(2)]NO3 under different reaction conditions, the trans amine trans chlorido configuration around the Co(III) metal centre of the (OC-6-12)-[Co(ceen)2(Cl)2]Cl complex was favored.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Adrian Sytniczuk, Filip Struzik, Vishal Purohit, Karol Grela, Anna Kajetanowicz
Summary: The synthesis of inexpensive 2-isopropyl-6-methylaniline analogues was achieved through the employment of aza-Claisen rearrangement and subsequent reduction of anilines, overcoming the issue of high price and low availability. The obtained aniline derivatives were utilized in the synthesis of lipophilic Hoveyda-Grubbs-type complexes, serving as efficient catalysts in ethenolysis reactions. The complexes with bulky sec-butyl substituent exhibited superior performance compared to the leading catalyst based on 2-isopropyl-6-methylaniline, making them valuable candidates for large-scale industrial production with a TON of up to 192,000.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Tesfaye Haile Habtemariam, V. J. T. Raju, Yonas Chebude
Summary: A pillared-layer metal-organic framework (MOF) with a mesoporous structure was successfully synthesized at room temperature using a mixture of water and methanol as the solvent. The MOF showed good crystallinity and the formation of mesopores was revealed by N2-sorption measurements. It also exhibited an electronic band gap and magnetic properties.
Article
Chemistry, Inorganic & Nuclear
Jing Sun, Xiongkai Tang, Jiaqi Tang, Yuhao Zhang, Zilin Li, Hui Chaolumen, Shuo Guo, Hui Shen
Summary: Little progress has been made in developing alternative bottom-up synthetic strategies for N-heterocyclic carbene (NHC)-stabilized gold nanoclusters, but this study presents a simple and straightforward approach using imidazolium salts instead of free carbenes or NHC-coordinated gold complexes as precursors. The researchers successfully synthesized an NHC-stabilized Au13Br4 cluster using a one-pot and one-step process involving chemical reduction. This work not only expands the Au13 library with a new NHC-ligated superatom, but also provides a facile and reasonable method to explore similar analogues.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Jessica R. Lamb, Christopher M. Brown, Jeremiah A. Johnson
Summary: N-Heterocyclic carbenes (NHCs) react with carbodiimides (CDIs) to form betaine adducts with tunable properties, whose stability depends on substituents on CDI nitrogens and configuration is influenced by NHC substituents. Despite being in the early stages, these adducts have been utilized as ligands for transition metals and nanoparticles, as connection points in zwitterionic polymers, and to stabilize distonic radical cations.
Review
Chemistry, Inorganic & Nuclear
Olga S. Taniya, Dmitry S. Kopchuk, Albert F. Khasanov, Igor S. Kovalev, Sougata Santra, Grigory Zyryanov, Adinath Majee, Valery N. Charushin, Oleg N. Chupakhin
Summary: The review highlights the strategic challenge of developing synthetic atom-economic one-pot approaches for 2,2':6',2''-terpyridine and its derivatives, as well as the importance of modern ligands in supramolecular chemistry. Furthermore, the development of alternative terpyridine domains based on the 2,2'-bipyridine core and their supramolecular properties as ligands with non-classical hypodentate coordination mode are discussed.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Applied
Tomer A. Dickstein, Ergang Zhou, Kian K. Hershberger, Angela K. Haskell, David Gene Morgan, Maren Pink, Barry D. Stein, Linda Zh. Nikoshvili, Valentina G. Matveeva, Lyudmila M. Bronstein
Summary: A one-pot solvothermal method was developed for the synthesis of magnetically recoverable catalysts with Ru or Ag nanoparticles capped by chitosan. The method allowed for the stabilization of 2.2 nm monodisperse Ru NPs with high catalytic activity, while leading to exceptionally large Ag nanocrystals. The catalyst displayed extraordinary shelf-life and reusability, making it promising for nitroarene reduction.
CARBOHYDRATE POLYMERS
(2021)
Article
Chemistry, Multidisciplinary
Jiaqiang Sun, Lei Tao, Chenliang Ye, Yu Wang, Ge Meng, Hengyuan Lei, Shenke Zheng, Chuang Xing, Xin Tao, Pengfei Wu, Jiangang Chen, Shixuan Du, Dingsheng Wang, Yadong Li
Summary: A dual-atomic-site catalyst, Ru1Zr1/Co, was designed for Fischer-Tropsch synthesis (FTS), showing enhanced FTS activity and C5+ selectivity. The synergic effect between Ru and Zr single-atom site on Co NPs contributes to the improved performance.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Lenka Pallova, Laura Abella, Marion Jean, Nicolas Vanthuyne, Cecile Barthes, Laure Vendier, Jochen Autschbach, Jeanne Crassous, Stephanie Bastin, Vincent Cesar
Summary: The first efficient chiral helicene-NHC gold(I) complexes for enantioselective catalysis have been synthesized. Their structural and stereochemical characterization confirms their potential in asymmetric catalysis, demonstrated by the benchmark cycloisomerization reaction with high enantiomeric excess.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Lauriane Bruna, Miquel Cardona-Farreny, Vincent Colliere, Karine Philippot, M. Rosa Axet
Summary: Exploiting biomass to synthesise compounds that can replace fossil-based ones is highly important for reducing dependence on non-renewable resources. 1,2-pentanediol and 1,5-pentanediol can be produced through a metal catalysed hydrogenation/C-O cleavage procedure from furfural, furfuryl alcohol or tetrahydrofurfuryl alcohol. Colloidal ruthenium nanoparticles stabilized with polyvinylpyrrolidone, in situ modified with different organic compounds, can directly produce 1,2-pentanediol from furfural with a selectivity of 36% at 125 degrees C under 20 bar of H-2 pressure.
Article
Chemistry, Multidisciplinary
Susana Carregal-Romero, Ana Beatriz Miguel-Coello, Lydia Martinez-Parra, Yolanda Marti-Mateo, Pablo Hernansanz-Agustin, Yilian Fernandez-Afonso, Sandra Plaza-Garcia, Lucia Gutierrez, Maria del Mar Munoz-Hernandez, Juliana Carrillo-Romero, Marina Pinol-Cancer, Pierre Lecante, Zurine Blasco-Iturri, Lucia Fadon, Ana C. Almansa-Garcia, Marco Moller, Dorleta Otaegui, Jose Antonio Enriquez, Hugo Groult, Jesus Ruiz-Cabello
Summary: Manganese ferrite nanoparticles have unique properties in bioimaging and catalytic therapies. They have been used as contrast agents in magnetic resonance imaging (MRI) and as catalase-mimicking nanozymes for hypoxia alleviation. A cost-efficient synthetic microwave method has been developed to manufacture ultrasmall manganese ferrite nanoparticles with enhanced bioimaging and catalytic properties. These nanoparticles can be used as multimodal contrast agents in MRI and positron emission tomography (PET), and also have improved catalytic efficiency.
Article
Biochemistry & Molecular Biology
Mirko Ruamps, Stephanie Bastin, Lionel Rechignat, Alix Sournia-Saquet, Laure Vendier, Noel Lugan, Jean-Marie Mouesca, Dmitry A. Valyaev, Vincent Maurel, Vincent Cesar
Summary: The coordination chemistry of the N-heterocyclic carbene ligand IMes((NMe2)2), and its interaction with transition metal centers, was investigated. The redox behavior of the resulting organometallic complexes was studied, revealing the different oxidation states and their effects on the donating properties of the ligand.
Article
Chemistry, Physical
Francois Robert, Pierre Lecante, Jean-Sebastien Girardon, Robert Wojcieszak, Eric Marceau, Valerie Briois, Catherine Amiens, Karine Philippot
Summary: The conversion of biomass into valuable chemicals and fuels is attractive for the chemical industry, but alternative catalysts from abundant and low-cost metals are needed. NiFe nanoparticles have shown promise, but their transformation in oxidative and reductive atmospheres is an important issue to address. This study investigates the evolution of the chemical order and oxidation state of NiFe nanoparticles and their potential impact on catalysis.
FARADAY DISCUSSIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Katarzyna Gajda, Adrian Sytniczuk, Laure Vendier, Bartosz Trzaskowski, Noel Lugan, Anna Kajetanowicz, Stephanie Bastin, Karol Grela, Vincent Cesar
Summary: Three Hoveyda-Grubbs complexes supported by N-(9-alkylfluorenyl)imidazol-2-ylidene ligands were synthesized. The C(sp(3))-H activation of the dangling alkyl group was studied for generating cyclometalated (C,C-NHC) ruthenium complexes for Z-selective olefin metathesis. The methyl derivative led to the expected cyclometalated complex, while no C(sp(2))-H activation of the fluorenyl moiety and no evolution/transformation were observed for the ethyl and benzyl derivatives, respectively. The cyclometalated complex exhibited Z/E stereoselectivity up to 94/6, despite its fragility under catalytic conditions. An unprecedented insertion of the alkylidene moiety into the Ru-C-NHC bond leading to ruthenium N-heterocyclic olefin complexes was also observed and supported by calculations of the corresponding reaction pathway.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Karim Azouzi, Lucie Pedussaut, Romane Pointis, Anna Bonfiglio, Riddhi Kumari Riddhi, Carine Duhayon, Stephanie Bastin, Jean-Baptiste Sortais
Summary: Manganese, an earth-abundant transition metal, shows great potential as a catalyst for reduction-type reactions. In this study, a simple bis-N-heterocyclic ligand without phosphine associated with manganese complex [Mn(bis-NHCMes)(CO)(3)Br] was found to effectively catalyze the hydrogenation of carboxylic esters in the presence of KBHEt(3) as an activator at high temperature and pressure.
Review
Environmental Sciences
Yakubu Adekunle Alli, Peter Olusakin Oladoye, Onome Ejeromedoghene, Owolabi Mutolib Bankole, Oyekunle Azeez Alimi, Elizabeth Oyinkansola Omotola, Clement Ajibade Olanrewaju, Karine Philippot, Adeyemi S. Adeleye, Adeniyi Sunday Ogunlaja
Summary: Carbon dioxide is the most important greenhouse gas, accounting for 76% of all emissions. The concentration of atmospheric CO2 has increased significantly and is projected to continue rising. In addition to reducing emissions, capturing and transforming CO2 into valuable materials, such as fuels, using engineered nanomaterials shows promise.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Review
Chemistry, Physical
Gerard Marti, Laura Mallon, Nuria Romero, Laia Francas, Roger Bofill, Karine Philippot, Jordi Garcia-Anton, Xavier Sala
Summary: The catalytic properties of metal nanoparticles can be controlled by selecting their surface-coordinated species, which affects key catalytic intermediates and the catalyst-electrolyte interface. Surface-functionalization of metal nanoparticles plays a crucial role in charge transfers and recombination processes in photoactivated systems, enhancing their catalytic performance in artificial photosynthesis. This article provides a critical analysis of synthetic methods and the effects of surface-functionalization on the oxygen evolution reaction, hydrogen evolution reaction, and CO2 reduction reaction.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Deepthy Krishnan, Leonhard Schill, M. Rosa Axet, Karine Philippot, Anders Riisager
Summary: A series of ruthenium nanoparticles (RuNPs) were synthesized using an organometallic approach in different functionalized imidazolium ionic liquids (FILs). The RuNPs, with sizes ranging from 1.3 to 2.2 nm, depending on the IL functionalization, were well-dispersed and narrow-sized as shown by transmission electron microscopy (TEM). The interaction between the RuNPs and the ILs was studied using thermal gravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS). The RuNPs stabilized by methoxy-based FILs (MEM and MME) exhibited a good balance between catalytic activity and stability in the hydrogenation of styrene (S) under mild reaction conditions, showing total selectivity towards ethylbenzene (EB) at lower reaction conditions (5 bar, 30 degrees C) compared to other RuNP catalysts reported in the literature.
Article
Chemistry, Multidisciplinary
Chantal J. Abou-Fayssal, Christophe Fliedel, Rinaldo Poli, Anders Riisager, Karine Philippot, Eric Manoury
Summary: This study introduces a method to improve the confinement of rhodium nanoparticles (RhNPs) in nanoreactors by introducing phosphine oxide as anchoring groups in the hydrophobic core of amphiphilic star-block copolymers. The RhNP-loaded latex exhibits excellent catalytic activity and recyclability, making it a promising candidate for aqueous biphasic catalysis.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Quyen T. Nguyen, Francois Robert, Vincent Colliere, Pierre Lecante, Karine Philippot, Jerome Esvan, Phong D. Tran, Catherine Amiens
Summary: This study focuses on the development of sustainable catalytic processes for the production of hydrogen from water. NiFe-based nanoparticles have been synthesized and characterized, showing promising performance in the electrocatalytic oxygen evolution reaction. The Ni2Fe1 nanocatalyst exhibits the lowest overpotential and excellent stability.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Zihan Ma, Lishuang Wang, Tingting Chen, Guangning Wang
Summary: In this study, two kinds of 3D self-doped (N/O) lilac-based and coriander-based porous carbons with high performance have been prepared.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Qin Wang, Yun-Fan Yan, Jiao-Lin Weng, Ying Huang, Fu Yang, Hao-Hui Xie, Fei Tan, Fa-Kun Zheng, Jian-Gang Xu
Summary: Balancing energy and mechanical sensitivities is a challenging issue in the field of energetic materials. This study constructed a 3D energetic metal-organic framework with nitrogen-rich ligand and NO3- anions. The framework demonstrated high stability, energy density, and excellent mechanical sensitivities, making it a potential insensitive energetic material.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Marrium Saeed, Urooj Kamran, Amina Khan, Md Irfanul Haque Siddiqui, Hasan Jamal, Haq Nawaz Bhatti
Summary: In this study, magnesium-aluminum layered double hydroxides (Mg-Al-LDH) were synthesized using an environmentally friendly hydrothermal technique for adsorbing the dye reactive green 5 (RG5). To improve the adsorption capability, composites were prepared by combining Mg-Al-LDH with low-cost Mangifera indica stone biomass (MISB). The results showed that the composites had high adsorption capacities for RG5 dye and could be regenerated.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Xuanlin Zhan, Xiaojie Li, Yunyan Zeng, Siyan Jiang, Chao Pan, Shiyu Pan, Jiaquan Huang, Heqian Zhang, Zhiwei Qin
Summary: This study reports on the potential prospects of natural products derived from the rhizosphere for the development of antibiotics and herbicides, as well as the advancements in cultivating a mutant strain that produces a substantial quantity of lydicamycins, a potent family for herbicide development.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Jie Zhu, Jiangtao Yu, Linhua Zhu, Xiaoxiao Yu, Jixing Liu, Yanhong Chao, Jingzhou Yin, Peiwen Wu, Jian Liu, Wenshuai Zhu
Summary: This study successfully demonstrates the 3D printing of attapulgite monoliths and investigates the influence of thermal treatment on their properties. The thermal treated monoliths show superior catalytic performance at low temperatures.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Yanzhu Ye, Yixiang Ye, Jiannan Cai, Zhongshui Li, Shen Lin
Summary: In this paper, a novel Pt/CoP/C photo-electro synergistic catalyst was successfully synthesized and its performance was investigated. The catalyst exhibited excellent photo-electro catalytic performance, with significantly higher hydrogen production compared to a commercial catalyst. The introduction of cobalt phosphide and the existence of Co3O4 were identified as key factors for enhancing the catalytic activity.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Nurul Hidayah Abu Bakar, Wan Norfazilah Wan Ismail, Hartina Mohd Yusop, Noreen Farzuhana Mohd Zulkifli
Summary: Hydrophobic coatings inspired by the lotus effect have gained popularity for their ability to solve various problems. The sol-gel method, utilizing silica, alumina, and titania, is explored as an environmentally friendly approach to produce water-based hydrophobic coatings. This study focuses on producing water-based hydrophobic coatings for cotton and polyester fabrics using a one-step sol-gel method. The coated fabrics exhibited improved hydrophobic properties, altered surface morphologies, and lower air permeability compared to uncoated fabrics. TEOS-PDMS coating provides a promising approach for enhancing the hydrophobic and surface properties of cotton and polyester fabrics.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Nikita Belko, Hanna Maltanava, Anatol Lugovski, Polina Shabunya, Sviatlana Fatykhava, Evgeny Bondarenko, Pavel Chulkin, Sergey Poznyak, Michael Samtsov
Summary: This study investigates the difference in electrochemical behavior between rhodamine B hydrazide and rhodamine B acylhydrazone, and finds that rhodamine B acylhydrazone exhibits higher reversibility in electrooxidation. These results can be applied for developing new sensors with desired electrochemical properties.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Showket Ahmad Bhat, Mohd Ikram
Summary: In this study, 0-3 particulate multiferroic composites were synthesized and characterized. The composites exhibited excellent ferroelectric and ferromagnetic properties, as well as high piezoelectric strain and magnetoelectric coupling effects.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Carla Gomes, Mariana Costa, Susana M. M. Lopes, Bernardo Albuquerque Nogueira, Rui Fausto, Jose A. Paixao, Teresa M. V. D. e Melo, Luisa M. D. R. S. Martins, Marta Pineiro
Summary: The development of sustainable processes requires the integration of green chemistry principles. In this study, a solvent-free synthesis method was developed to prepare new copper catalysts, which efficiently catalyze cycloaddition reactions under solvent-free mechanochemical conditions. Through this process, the principles of atom economy, reduction of solvents and auxiliaries, design for energy efficiency, and reduction of derivatives and catalysis are combined.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Zhihua Liu, Jinzhe Li, Jianguo Zhou
Summary: This study demonstrates the enhancement of photoelectrochemical activity of BiFeO3 photoelectrodes through ion modification, which increases visible light absorption and active area, leading to improved PEC water splitting performance.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Yisheng Zhang, Wensong Li, Jing Li, Fang Li, Wei Xue, Xinqiang Zhao, Yanji Wang
Summary: Pt/C and SO42-/ZrO2 were used as catalysts for the synthesis of p-aminophenol through the catalytic transfer hydrogenation of nitrobenzene in water with formic acid as the hydrogen source. The optimal Pt loading for PAP selectivity was found to be 1 wt%. The presence of different valence states of Pt affected both the nitrobenzene hydrogenation and formic acid decomposition. Among different solid acid catalysts tested, SO42-/ZrO2 exhibited the highest catalytic activity for p-aminophenol formation. Under the optimized reaction conditions, the conversion of nitrobenzene reached 80.0%, with a selectivity of 47.6% for p-aminophenol.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Pradyota Kumar Behera, Papita Behera, Amlan Swain, Santosh Kumar Sahu, Ajeena Sahoo, Laxmidhar Rout
Summary: We have developed a simple and direct method for the synthesis of diaryl ether using an oxygen bridged bimetallic CuMoO4 nanocatalyst under mild reaction conditions. The catalyst exhibited tolerance towards a wide range of substrates with various functional groups. It is efficient and recyclable. This methodology allows easy access to nitrofen derivatives (herbicides) from unactivated 2,4-dichlorophenol, which are important for agriculture and pharmaceuticals.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Yihua Fu, Yan Zhang, Changwei Hu, Zhishan Su
Summary: The mechanism of the reaction between CO2 and styrene oxide for cyclic carbonate was revealed using density functional theory calculations. The noncatalytic reaction occurred via a concerted mechanism, while in the presence of guanidine and tetrabutylammonium iodide (TBAI) co-catalysts, the epoxide ring-opening by nucleophilic attack of an iodide anion was predicted to be the rate-determining step. Guanidine acted as the H-bond donor to activate styrene oxide, facilitating the reaction with a lower activation barrier.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Saikat Khamarui, Sirshendu Ghosh
Summary: Copper nanorods (Cu-NRs) exhibit significant plasmonic behavior and can act as efficient catalysts in redox processes and coupling. A benign decarboxylative approach, utilizing localized surface plasmon resonance (LSPR) assisted catalysis with Cu-NRs, has been developed for the production of alkane analogues from alkyl carboxylic acids under visible light. The catalyst shows a broad substrate scope and high functional group tolerance, without the need for an external oxidant or proton source. A plausible mechanism for this recyclable nano-catalyst has also been proposed based on control experiments.
NEW JOURNAL OF CHEMISTRY
(2024)