Article
Chemistry, Inorganic & Nuclear
Bahareh Rezaei Kheirkhah, Wimonsiri Huadsai, Phil Liebing, Seibastien Bontemps, Matthias Westerhausen
Summary: Metalation of N-(2,6-dibenzhydryl-4-tolyl)adamantane-1-carboxamide with M(NMe2)4 (M = Ti, Zr, Hf) affords amidate complexes 2 as well as bis(amidate) compounds 3 and 4. In compound 2, the amidate ligand acts as a monodentate base via the oxygen atom with the Ti center. Compounds 3 and 4 contain two bidentate amidate ligands, resulting in hexacoordinate group IV metal atoms.
Article
Chemistry, Organic
Ke-Qin Wu, Hui Li, Ao Zhou, Wei-Ran Yang, Qin Yin
Summary: A Pd-catalyzed regioselective C-H bond allylic alkylation of phenols with 1,3-dienes is reported, which selectively functionalizes the ortho C-H bond of 2-naphthols, 1-naphthols, and electron-rich phenols to synthesize phenol derivatives with diverse structures. The reaction is accelerated by a diphosphine ligand, does not require any other additive, and exhibits broad substrate scope and good chemo- and regioselectivity. Additionally, an asymmetric variant is investigated, achieving product with up to 55% enantiomeric excess.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Organic
Teng Jia, Shengyu Fan, Fengmian Li, Xiaohan Ye, Wenke Zhang, Zhiguang Song, Xiaodong Shi
Summary: The intermolecular hydro-amination of arylalkynes with aliphatic amine catalyzed by a combination of 1,2,3-triazole-coordinated gold(I) catalyst and Zn(OTf)(2) cocatalyst has been successfully achieved with good to excellent yields and regioselectivity. Compared to previous methods, this approach offers an alternative catalyst system for this fundamental chemical transformation with high efficiency and practical conditions.
Article
Chemistry, Multidisciplinary
Qiuyu Li, Xinxin Fang, Rui Pan, Hequan Yao, Aijun Lin
Summary: This study reports a Pd-catalyzed sequential hydroamination reaction that can efficiently synthesize various imidazolidinones, thiadiazolidines, and imidazolidines. Asymmetric sequential hydroamination generates a series of enantioenriched imidazolidinones with synthetic value.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Organic
Jun-Sheng Wei, Song Yang, Yin Wei, Sima Shamsaddinimotlagh, Hossein Tavakol, Min Shi
Summary: A gold(i)-catalyzed intramolecular cyclization reaction was developed to synthesize functionalized morpholines, piperazines, and oxazepanes. The reaction proceeds via a carbene or non-carbene process and exhibits a broad substrate scope, good functional group tolerance, and mild reaction conditions. The reaction pathway can be modulated by the steric bulkiness or chain length of the substrate.
ORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Organic
Maxime Hourtoule, Laurence Miesch
Summary: We developed a domino reaction for the synthesis of 2-amido-5-fluoropyrroles from CF3-substituted N-allenamides. By employing silver catalysis with a primary amine, the in situ generated gem-difluorinated ene-ynamides derived from CF3-substituted N-allenamides undergo simultaneous hydroamination and 5-endo-trig addition/beta-fluoride elimination sequence, leading to the construction of 2-amido-5-fluoropyrroles. This method shows excellent functional group compatibility and can be used for the synthesis of functionalized benzo-oxazoles by using 2-aminophenols.
Review
Chemistry, Multidisciplinary
Ian A. Tonks
Summary: This study discusses the recent progress in Ti-catalyzed oxidative amination reactions, highlighting the importance of understanding the reactive species and mechanisms involved. The research shows that low-valent Ti intermediates can be stabilized through coordination and that reductive elimination processes occur through pi-type electrocyclic reactions. These findings are crucial for advancing catalytic applications involving titanium.
ACCOUNTS OF CHEMICAL RESEARCH
(2021)
Article
Materials Science, Coatings & Films
C. da Silva Oliveira, D. Martinez-Martinez, L. Cunha, S. Lanceros-Mendez, P. Martins, E. Alves, N. P. Barradas, M. Apreutesei
Summary: In this study, Zr-O-N films containing Ti were prepared by adding Ti ribbons on the racetrack of a Zr target during reactive magnetron sputtering. The addition of Ti ribbons prevented the target from being poisoned, especially at lower target currents, leading to a more controlled sputtering process. The color and electrical properties of the films were found to be closely related to the oxygen-to-metal ratio, while the N concentration did not have a significant impact.
SURFACE & COATINGS TECHNOLOGY
(2021)
Review
Biochemistry & Molecular Biology
Zhihui Ni, Hongjin Lv, Guoyu Yang
Summary: This review focuses on the structural diversities and catalytic applications of Ti/Zr-substituted polyoxometalates (POMs). The synthesis strategies of Ti/Zr-substituted POMs and their potential future development are discussed.
Article
Chemistry, Organic
Linlin Zhang, Lin Qi, Hui-Jie Du, Jia-Li Liu, Tong-Yang Cao, Zhi-Min Yan, Wei Li, Li-Jing Wang
Summary: A new synthetic method using palladium as catalyst has been developed to efficiently produce 4-methylene-1,3-oxazine frameworks. The conversion of these frameworks to compounds with diverse heteroatom-rich moieties has been demonstrated through subsequent reactions. This method has significant applications in medicinal and biological chemistry.
ORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Physical
Perumal Venkatesan, Subbiah Thamotharan, M. Judith Percino, Andivelu Ilangovan
Summary: Two asymmetrically substituted geminal amido-esters were synthesized, and the nature and strength of intramolecular resonance assisted hydrogen bond (RAHB) and non-RAHB were studied. The crystal structures were characterized by X-ray analysis and intermolecular interaction energies were quantified using different methods. The theoretical charge density analysis revealed closed-shell characteristics in the interactions, and the crystal packing was analyzed based on the energy frameworks.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Chemistry, Inorganic & Nuclear
Emily Y. Fok, Veronica L. Show, Adam R. Johnson
Summary: The laboratory has developed catalysts based on earth abundant titanium for asymmetric reactions, showing improved enantioselectivity with new ligands, but unexpected dimerization of the catalyst resulted in reduced activity.
Article
Physics, Applied
V Werner, J. Schoiber, G. J. Redhammer, T. Berger, S. Pokrant
Summary: Photoelectrochemical water-splitting with Ti-site substitution in LaTi(O,N)(3) leads to improved photocurrent density, linked to reduced (crystalline) defects at low substitution levels. However, excessive Nb doping may decrease charge carrier density, underscoring the importance of carefully tuning synthesis conditions for optimal performance.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Inorganic & Nuclear
Robert J. Harris, Kohki Nakafuku, Robert G. Carden, Jacob C. Timmerman, Ross A. Widenhoefer
Summary: The mechanism of hydroamination of enantiomerically enriched, axially chiral (R)-1-aryl-1,2-butadienes with aniline catalyzed by (IPr)AuOTf involves the formation of a gold-x-allene intermediate, leading to the formation of racemic product rac-2, where approximately 30% of rac-2 is formed directly from (R)-1 without the intermediacy of rac-1.
Article
Chemistry, Inorganic & Nuclear
Rajata Kumar Sahoo, Arukela Ganesh Patro, Nabin Sarkar, Sharanappa Nembenna
Summary: This study presents the (pre)catalyzed addition of carbodiimides with E-H (E = B, C, N, and O) using a conjugated bis-guanidinate (CBG) supported zinc hydride. Compound 1 catalyzed the reduction of carbodiimides with various reagents, yielding a series of N-boryl formamidines, propiolamidines, guanidines, and isoureas. The reactions showed good tolerance towards functional groups and involved multiple active catalysts and intermediates.
Article
Biochemistry & Molecular Biology
Tongjun Sun, Jianhua Huang, Yan Xu, Vani Verma, Beibei Jing, Yulin Sun, Alberto Ruiz Orduna, Hainan Tian, Xingchuan Huang, Shitou Xia, Laurel Schafer, Reinhard Jetter, Yuelin Zhang, Xin Li
Article
Chemistry, Inorganic & Nuclear
Samuel E. Griffin, Laurel L. Schafer
INORGANIC CHEMISTRY
(2020)
Article
Polymer Science
Nirmalendu Kuanr, Tanja Tomkovic, Damon J. Gilmour, Mitchell R. Perry, Shou-Jen Hsiang, Evelyne van Ruymbeke, Savvas G. Hatzikiriakos, Laurel L. Schafer
Article
Chemistry, Physical
Han Hao, Laurel L. Schafer
Article
Chemistry, Multidisciplinary
Pargol Daneshmand, Sorin-Claudiu Rosca, Rosalie Dalhoff, Kejun Yin, Rebecca C. DiPucchio, Ryan A. Ivanovich, Dilan E. Polat, Andre M. Beauchemin, Laurel L. Schafer
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2020)
Correction
Chemistry, Physical
Han Hao, Laurel L. Schafer
Article
Chemistry, Multidisciplinary
Ana Koperniku, Laurel L. Schafer
Summary: The zirconium catalyzed hydroaminoalkylation of alkenes with N-aryl- and sterically demanding N-alkyl-alpha-arylated secondary amines using commercially available Zr(NMe2)(4) is reported. The catalyst is compatible with challenging alpha-heteroarylated amines and functionalized alkene substrates, providing a new disconnection strategy for selectively substituted saturated alpha-arylated heterocycles.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Erick Nunez Bahena, Samuel E. Griffin, Laurel L. Schafer
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2020)
Article
Chemistry, Organic
Han Hao, Thibault Bagnol, Mathieu Pucheault, Laurel L. Schafer
Summary: By utilizing a specific titanium precatalyst, the hydroamination of alkynylphosphines to prepare 2-amino-phosphines in high yield and on gram scale has been achieved. The broad substrate scope allows for the rapid assembly of a variety of ligands in one pot, making preparation of metal P,N-complexes for catalysis or small molecule activation easy and efficient.
Article
Chemistry, Physical
Manfred Manssen, Danfeng Deng, Cameron H. M. Zheng, Rebecca C. DiPucchio, Dafa Chen, Laurel L. Schafer
Summary: Hydroaminoalkylation involves the catalytic synthesis of amines from easily accessible amine and alkene feedstocks, utilizing a cost-efficient titanium catalyst with high catalytic activity and regioselectivity. The synthesized amine-containing monomers are suitable for generating amine-containing materials and building blocks for medicinal chemistry.
Article
Chemistry, Multidisciplinary
Rebecca C. DiPucchio, Karst E. Lenzen, Pargol Daneshmand, Maria B. Ezhova, Laurel L. Schafer
Summary: This study presents a method for the direct alkylation of unprotected amine heterocycles using an early transition-metal system, allowing for short reaction times and selective formation of branched reaction products in most cases. By avoiding the use of high loadings of precious metal catalysts, this method offers a more efficient approach to alkylate saturated N-heterocycles.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Damon J. Gilmour, Tanja Tomkovic, Nirmalendu Kuanr, Mitchell R. Perry, Hans Gildenast, Savvas G. Hatzikiriakos, Laurel L. Schafer
Summary: The successful catalytic synthesis of amine-functionalized polyolefins transforms simple starting materials into polar-functionalized polymers with complete atom economy. These materials exhibit tunable rheological properties, autonomous self-healing, and unexpected adhesion to PTFE through dynamic associative interactions like hydrogen bonding.
ACS APPLIED POLYMER MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Manfred Manssen, Laurel L. Schafer
CHEMICAL SOCIETY REVIEWS
(2020)
Meeting Abstract
Chemistry, Multidisciplinary
Laurel Schafer
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2019)
Meeting Abstract
Chemistry, Multidisciplinary
Laurel Schafer
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(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)