Article
Chemistry, Multidisciplinary
Hyung-Joon Kang, Changseok Lee, Sungwoo Hong
Summary: Kinetic resolution is a powerful strategy for isolating enantioenriched compounds from mixtures, and the development of selective catalytic processes is an active research area. In this study, a nickel-catalyzed kinetic resolution of racemic alpha-substituted unconjugated carbonyl alkenes was achieved through enantio-, diastereo-, and regioselective hydroamination, resulting in chiral alpha-substituted butenamides and syn-beta(2,3)-amino acid derivatives with high enantiomeric purity (up to 99% ee) and selectivity factor up to >684. The unique structure of the chiral nickel complex plays a key role in the efficient kinetic resolution and enantioselective bond construction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Applied
Srinivasarao Yaragorla, Dandugula Sneha Latha, Pallava Rajesh
Summary: The study introduced a simple and efficient One-Pot three-component reaction using tert-propargyl alcohols, primary amines, and acyl ketones to synthesize fully substituted pyrroles and pyridine derivatives. A green calcium catalyst was employed to facilitate the formation of β-amino allene intermediate, leading to fully substituted five and six-membered azacyclic compounds through subsequent hydroamination and deacylation reactions.
ADVANCED SYNTHESIS & CATALYSIS
(2021)
Article
Chemistry, Physical
Alexander N. Selikhov, Anton V. Cherkasov, Yulia V. Nelyubina, Alexander A. Trifonov
Summary: This article reports the synthesis and structures of two thermally stable base-free heterobimetallic benzhydryl complexes, which showed unprecedented catalytic activity and regioselectivity in intermolecular olefin hydroamination, involving a broad scope of substrates.
Article
Chemistry, Physical
Tao Li, Karl N. McCabe, Laurent Maron, Xuebing Leng, Yaofeng Chen
Summary: The study presents the synthesis and structural characterization of two calcium alkyl complexes supported by beta-diketiminato-based tetradentate ligands, as well as their catalytic properties in promoting redistribution reactions and cross-coupling between electron-withdrawing and electron-donating substrates. These findings offer insights into the mechanistic aspects of the reactions and highlight the potential of calcium complexes as versatile catalysts in organic synthesis, providing a new strategy for the development of organosilicon compounds.
Article
Chemistry, Physical
Miquel Navarro, Macarena G. Alferez, Morgane de Sousa, Juan Miranda-Pizarro, Jesus Campos
Summary: A series of gold(I)-ethylene pi-complexes containing bulky phosphine ligands have been synthesized, and the importance of these ligands in stabilizing the gold(I)-ethylene bond and preventing decomposition has been discovered. By improving the catalyst structure and reaction conditions, the catalytic performance in the hydroamination of ethylene can be enhanced.
Article
Chemistry, Inorganic & Nuclear
Deepamali Dissanayake, Craig Forsyth, Dragoslav Vidovic
Summary: This research reports the synthesis and characterisation of several chiral aluminium compounds with oxazoline-containing beta-diketiminate type ligands. These chiral Lewis acid complexes, in combination with 1 equiv. of Na(BAr4Cl), were successfully used as catalysts in asymmetric Diels-Alder reactions between 1,3-cyclohexadiene and various chalcones. Increasing the steric demand of the ligands' achiral end resulted in improved enantioinduction for the cyclisation of 1,3-cyclohexadiene and chalcone. Furthermore, modifying the chiral end by introducing a tert-butyl group to the stereogenic center of the oxazoline fragment yielded the highest enantioselectivity value. The substrate scope was expanded to include several different dienophiles, generating enantiomeric excess values ranging from 24-68%.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Organic
Wensen Ouyang, Bairong Liu, Yi He, Yanmei Wen, Yang Gao, Yanping Huo, Qian Chen, Xianwei Li
Summary: A switchable C-H alkylation and N-alkylation method with high chemo- and site-selectivity was developed using N-nitroso anilines, which yielded functionalized anilines, hydrazines, and heterocycles. The study explored strain-release as the driving force for mild and practical sequential C-H and C-C or C-O cleavage reactions with structurally diverse olefins. Interestingly, N-nitroso anilines were found to act as traceless directing groups for indole synthesis via dehydrogenative coupling with styrenes.
ORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Multidisciplinary
Bingcheng Wang, Yufeng Sun, Zhan Lu
Summary: A cobalt-catalyzed sequential dehydrogenative Heck silylation/hydroamination reaction was reported to access 1-amino-2-silyl compounds with high regioselectivity. The reaction exhibited good functional group tolerance under mild conditions.
CHINESE JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Jan Schulz, Reike Clauss, Aleksandr Kazimir, Sieglinde Holzknecht, Evamarie Hey-Hawkins
Summary: The synthesis of B9-Phos ligands with two carboranyl moieties and bulky electron-donating substituents, previously deemed unattainable, is reported. The electrochemical properties of B9-Phos ligands were investigated, showing the ability of mesityl derivatives to form stabilized phosphoniumyl radical cations. The B9-Phos ligands possess a highly electron-releasing character surpassing that of alkyl phosphines and commonly used N-heterocyclic carbenes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Christoph Helling, Cameron Jones
Summary: The influence of aryl substituents on the Schlenk-type equilibria of arylberyllium bromides was systematically studied, and the structures of the complexes were characterized using spectroscopic methods and X-ray diffraction. The study provides insights into the steric effects of aryl groups on the reactivity and selectivity of the complexes.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Junmyeong Park, Dongwon Kim, Dongwook Kim, Ok-Sang Jung
Summary: Unusual successive two-step crystallization of chiral coordination polymers was carried out, resulting in the formation of chiral ladder coordination polymer single crystals. The crystals were then transformed into new crystals in their hydrated forms under moisture conditions, showing a subtle difference in hydration depending on chirality.
Article
Chemistry, Applied
Anais Coffinet, Vincent Levacher, Isabelle Gillaizeau, Jean-Francois Briere, Sylvain Oudeyer
Summary: A metal-catalyzed cyanomethylation of isatins and activated ketones using Ni-II-complexes with a pyridine(dicarboxamide) pincer ligand is reported. High isolated yields (up to 99%) were obtained at room temperature with various acetonitrile derivatives. The involvement of cation part (Cs+ or n-Bu4N+) likely enhances the formation and catalytic activity of the proposed ion paired catalysts [NiCR2CN](-)Cat(+).
ADVANCED SYNTHESIS & CATALYSIS
(2023)
Article
Chemistry, Physical
Yunhe Li, Jie Zhang, Xiang Zhao
Summary: The mechanism and origins of selectivity in a silver-catalyzed domino cyclization to spiroindolines were explored using DFT investigations. It was found that the dearomatization and hydroamination processes were controlled by TFA through hydrogen bond interactions, with the cooperation between TFA and AgOTf playing an important role in the hydroamination step.
MOLECULAR CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Maria Takahashi, Tsuyoshi Asatani, Tatsuki Morimoto, Yoshinobu Kamakura, Kotaro Fujii, Masatomo Yashima, Naoki Hosokawa, Yusuke Tamaki, Osamu Ishitani
Summary: In this study, new redox photosensitisers were synthesized, which can supply different numbers and reduction potentials of electrons to the catalyst in photocatalytic reactions, providing a new approach for the reduction of CO2.
Article
Chemistry, Multidisciplinary
Pauline Schiltz, Nicolas Casaretto, Audrey Auffrant, Corinne Gosmini
Summary: This study synthesized cobalt(II) complexes using phosphinoquinoline ligands with different phosphorus substituents. The obtained complexes were characterized by X-ray analysis and elemental analysis. One of the complexes, [L2CoBr](PF6), showed excellent catalytic activity for the hydrosilylation of ketones, resulting in moderate to high yields of silylated ethers.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Stacey D. Bennett, Simon J. A. Pope, Robert L. Jenkins, Benjamin D. Ward
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2016)
Article
Biochemistry & Molecular Biology
Ruchi Gaur, Diksha Kumari Choubey, Mohammad Usman, Benzamin D. Ward, Jagat Kumar Roy, Lallan Mishra
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
(2017)
Article
Chemistry, Inorganic & Nuclear
Lara M. Groves, Benjamin D. Ward, Paul D. Newman, Peter N. Horton, Simon J. Coles, Simon J. A. Pope
DALTON TRANSACTIONS
(2018)
Article
Chemistry, Inorganic & Nuclear
Emily E. Langdon-Jones, Benjamin D. Ward, Simon J. A. Pope
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2018)
Article
Polymer Science
Jack A. Stewart, Paul McKeown, Oliver J. Driscoll, Mary F. Mahon, Benjamin D. Ward, Matthew D. Jones
Article
Chemistry, Multidisciplinary
Jacopo Dosso, Tommaso Battisti, Benjamin D. Ward, Nicola Demitri, Colan E. Hughes, P. Andrew Williams, Kenneth D. M. Harris, Davide Bonifazi
CHEMISTRY-A EUROPEAN JOURNAL
(2020)
Article
Chemistry, Multidisciplinary
Jack Stewart, Martin Fuchs, Jack Payne, Oliver Driscoll, Gabrielle Kociok-Kohn, Benjamin D. Ward, Sonja Herres-Pawlis, Matthew D. Jones
Summary: Nine new complexes based on thioether appended iminophenolate (ONS) ligands have been synthesized and fully characterized using NMR spectroscopy. The solid-state structures and catalytic performance of these complexes in polymerization and degradation reactions have been investigated.
Article
Chemistry, Multidisciplinary
Sophie A. Fitzgerald, Xiao Xiao, Jianzhang Zhao, Peter N. Horton, Simon J. Coles, Richard C. Knighton, Benjamin D. Ward, Simon J. A. Pope
Summary: A series of 2-phenylquinoxaline ligands with CF3 or OCF3 groups were synthesized and investigated as cyclometalating reagents for platinum(II). The resulting complexes displayed efficient visible absorption and orange-red photoluminescence, which could be tuned by the ligand. The complexes also showed good upconversion efficiencies as photosensitizers for triplet-triplet annihilation energy upconversion.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Environmental Sciences
Thomas Allison, Benjamin D. Ward, Michael Harbottle, Isabelle Durance
Summary: Consumer wet wipes sold as biodegradable and flushable have seen a threefold increase in market size in the last decade, reaching over $3 billion in 2022. However, research shows that these wipes, which consist mainly of cellulosic fibers, do not degrade as claimed and may have negative environmental impacts.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Polymer Science
Taylor B. Young, Owaen G. Guppy, Alysia J. Draper, Joshua M. Whitington, Benson M. Kariuki, Alison Paul, Mark Eaton, Simon J. A. Pope, Benjamin D. Ward
Summary: Polymers often lack the properties required for their intended applications. Additives such as plasticizers, flame retardants, stabilizers, and colorants are used to modify their physical properties to suit the final product. However, colorants pose challenges for recycling technologies as they cannot be removed through reprocessing. The authors have developed a method to prepare colored polymers by adding chromophore monomers to copolymerization reactions, achieving highly colored materials with minimal changes in properties from the base polymer. They have also successfully depolymerized the colored polymers and reformed them into colorless polymers, paving the way for recyclable polymers with tunable properties through the use of dopant-level monomers.
Article
Environmental Sciences
Charlotte Robison-Smith, Numair Masud, Eve C. Tarring, Benjamin D. Ward, Jo Cable
Summary: This study is the first to investigate the impacts of water-soluble polymers (WSPs) on two freshwater species, showing that these polymers can negatively affect fish growth and metabolic rate, while also exerting a certain level of harm on parasites. This suggests that the environmental leaching of WSPs may cause significant disruption to interspecies interactions within freshwater ecosystems.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Polymer Science
Matthew S. Shaw, Morgan R. Bates, Matthew D. Jones, Benjamin D. Ward
Summary: The ring-opening co-polymerisation of epoxides and cyclic anhydrides is a versatile route to new polyesters. This study introduces the use of metallocene complexes as catalysts for this reaction, demonstrating their effectiveness in the preparation of bio-derived recyclable polymers.
Article
Chemistry, Inorganic & Nuclear
Sandeep Kaler, Paul McKeown, Benjamin D. Ward, Matthew D. Jones
Summary: A series of photoactive Schiff base ligands with azobenzene moieties, as well as seven Al(iii) and Zn(ii) complexes, were investigated for their ability to undergo trans-cis isomerisation upon exposure to UV light. The activity of the Al(iii) complexes' isomers displayed marked differences in the ring-opening polymerisation (ROP) of epsilon-caprolactone.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Mohammed A. Bahili, Emily C. Stokes, Robert C. Amesbury, Darren M. C. Ould, Bashar Christo, Rhian J. Horne, Benson M. Kariuki, Jack A. Stewart, Rebekah L. Taylor, P. Andrew Williams, Matthew D. Jones, Kenneth D. M. Harris, Benjamin D. Ward
CHEMICAL COMMUNICATIONS
(2019)
Article
Chemistry, Inorganic & Nuclear
Lara M. Groves, Catrin F. Williams, Anthony J. Hayes, Benjamin D. Ward, Marc D. Isaacs, Nadine O. Symonds, David Lloyd, Peter N. Horton, Simon J. Coles, Simon J. A. Pope
DALTON TRANSACTIONS
(2019)
Article
Chemistry, Inorganic & Nuclear
Vaibhav Bedi, Dipendu Mandal, Zahid Hussain, Shi-Ming Chen, Yile Wu, Zheng-Wang Qu, Stefan Grimme, Douglas W. Stephan
Summary: The reaction of (tBuO(2)CN)(2) with 9-BBN leads to the formation of a bicyclic heterocyclic compound, while its reactions with BF3 or [Et3Si][B(C6F5)(4)] result in the isolation of different compounds. Computational studies reveal that the steric and electronic properties of the Lewis acid are important in the formation of one of the compounds.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Chisa Itoh, Haruka Yoshino, Taku Kitayama, Wataru Kosaka, Hitoshi Miyasaka
Summary: A new synthetic route for constructing functional paddlewheel diruthenium(II,II) complexes was developed, utilizing Schiff base condensation reactions. The attached Schiff base groups significantly affected the electronic states of the resulting complexes, as revealed by cyclic voltammetry and DFT calculations.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Danrui Ni, Haozhe Wang, Xianghan Xu, Weiwei Xie, Robert J. Cava
Summary: A layered rhombohedral polymorph of indium(iii) triiodide is synthesized at high pressure and temperature. It has an orange color, which is different from ambient pressure InI3, which has a monoclinic molecular structure and a light-yellow color.
DALTON TRANSACTIONS
(2024)
Review
Chemistry, Inorganic & Nuclear
Juan Carlos Perez-Sanchez, Raquel P. Herrera, M. Concepcion Gimeno
Summary: Gold(II) complexes have been less utilized in catalysis compared to their gold(I) and gold(III) counterparts. However, gold(II) complexes offer potential in homo-coupling and cross-coupling reactions, as they are more easily accessible through simplified oxidation and reduction processes. Gold(II) exhibits characteristics of both soft acid gold(I) and hard acid gold(III). This review explores the unique reactivity and potential applications of gold(II) species, highlighting their significance in catalytic transformations.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Nighat Yousuf, Yanping Ma, Qaiser Mahmood, Wenjuan Zhang, Yizhou Wang, Hassan Saeed, Wen-Hua Sun
Summary: In this study, a series of structurally rigid cyclooctyl-fused iminopyridine iron complexes were synthesized and used with methylaluminoxane for isoprene polymerization. The extent of steric hindrance of the ligand framework was found to significantly affect catalytic performance, with less hindrance leading to better activity and stability.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Chenghao Song, Huiwei Du, Menglei Xu, Jie Yang, Xinyu Zhang, Jungan Wang, Yuanfang Zhang, Chengjun Gu, Rui Li, Tao Hong, Jingji Zhang, Jiangying Wang, Yongchun Ye
Summary: This study improves the performance of perovskite solar cells by using a dual-hole transport layer strategy. This strategy enhances the charge transfer efficiency of the transport layer, reduces charge recombination, and improves the quality of the perovskite film layer. Ultimately, the stability of the device is enhanced.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Mahender Singh, Aakash Yadav, Ranjit Singh, Chullikkattil P. Pradeep
Summary: A new aryl selenonium polyoxometalate hybrid was developed and compared with an aryl sulfonium polyoxometalate hybrid in terms of their photocatalytic properties. It was found that the aryl selenonium hybrid exhibited better catalytic performance, which could be attributed to the larger atomic radii of selenium stabilizing the photogenerated electron-hole pair more efficiently. Additionally, the generation of elemental selenium through cleavage of C-Se bonds during catalysis was observed.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Yuhan Xie, Boyu Dong, Xuemin Wang, Siyuan Wang, Jinxi Chen, Yongbing Lou
Summary: This study successfully fabricated visible-light-responsive three-dimensional core-shell CoSe2/ZnIn2S4 heterostructures and achieved attractive activity in photocatalytic hydrogen evolution. The presence of CoSe2 improved light absorption and accelerated charge transfer kinetics. The strong interaction between CoSe2 and ZnIn2S4 reduced charge recombination, further enhancing photocatalytic activity for hydrogen evolution.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Andre L. de O. Batista, Joao Marcos T. Palheta, Mauricio J. Piotrowski, Celso R. C. Rego, Diego Guedes-Sobrinho, Alexandre C. Dias
Summary: This study presents a simulation protocol that provides a solid foundation for exploring two-dimensional materials. Using the TiBr2 2H monolayer as an example, the study reveals its promising properties for optoelectronic and valleytronic applications, including its stability, spin-orbit coupling effects, and optical helicity selection rule.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Jiang Jiang, Zi-Wei Li, Zhi-Zhuan Zhang, Bin Tan, Zhao-Feng Wu, Xiao-Ying Huang
Summary: In this work, two metal organic frameworks (MOFs) containing {Cu2I2} clusters, Eu-CuI-INA and Sr-K-CuI-INA, were synthesized and characterized. Both materials have a three-dimensional structure with {Cu2I2} clusters coordinated by INA(-) ligands and Eu3+ or Sr2+ ions. The Sr-K-CuI-INA material exhibited sensitive fluorescence sensing behaviors towards cysteine and nitro-bearing molecules, showing potential applications in bio and explosive molecule sensing. This work provides a good reference for designing fluorescent MOF probes containing CuI molecules.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Zhiya Lin, Jiasheng Wu, Qianwen Ye, Yulong Chen, Hai Jia, Xiaohui Huang, Shaoming Ying
Summary: Na-ion batteries (NIBs) have attracted great interest as a potential technology for grid-scale energy storage due to the wide distribution, low cost, and environmental friendliness of sodium resources. However, their implementation is hindered by low rate capability and cycling stability caused by the large ionic size of Na+. In this study, a three-dimensional nanoarchitectured coral-like CoSe2@N-doped carbon (CL-CoSe2@NC) was synthesized, and it exhibited improved sodium storage properties with better electrode kinetics and a stable SEI film.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Ya-Qiong Zhang, Yu Zhang, Guoping Zeng, Rong-Zhen Liao, Man Li
Summary: The mechanism and selectivity of CO2 reduction under visible light were investigated using density functional calculations. The results showed that a tetradentate PNNP-type Iridium(III) complex exhibited high activity and selectivity in the reaction.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Sanyukta Ghosh, Shubhanth Jain, Soumya Ranjan Mishra, Gerda Rogl, Peter Rogl, Ernst Bauer, B. S. Murty, A. Govindaraj, Ramesh Chandra Mallik
Summary: In this study, reduced graphene oxide (rGO) was uniformly dispersed in the In0.5Co4Sb12 bulk material by ultrasonication, which effectively reduced the lattice thermal conductivity and improved the thermoelectric efficiency.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Mika Takeuchi, Yutaka Amao
Summary: This study developed an effective visible-light driven system for fumaric acid production using renewable resources such as biomass derivatives, providing an alternative to the current petroleum-based synthesis methods.
DALTON TRANSACTIONS
(2024)
Article
Chemistry, Inorganic & Nuclear
Juan Jian, Meiting Wang, Zhuo Wang, Jingwen Meng, Yuqin Yang, Limin Chang
Summary: Developing low-cost and self-supported bifunctional catalysts is crucial for highly efficient water splitting devices. In this study, nano-NiFe2O4 was directly grown onto iron foil surface and Sn4+ was introduced into the NiFe2O4. The resulting Sn-NiFe2O4/IF showed low overpotentials and high current densities during oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), making it a promising catalyst for large-scale hydrogen production.
DALTON TRANSACTIONS
(2024)