Article
Chemistry, Applied
Bing Liu, Jin Fan, Wenzhao Liu, Guannan Zhang, Zhaoyang Wu
Summary: By controlling the calcination time, hollow SiO2 nanoparticles with different carbon black contents were obtained and assembled into photonic crystal inks (PCIs). The PCIs exhibited excellent saturation and high crystallinity, and were further converted into non-close-packed photonic crystal films. The films showed solvent-responsive structural color changes and shifts in reflection peaks, and could dynamically change from an opaque to a translucent state.
Article
Chemistry, Multidisciplinary
Z. Tian, C. Dong, D. Li, G. -H. Wang
Summary: The highly selective semihydrogenation of alkynes can be achieved using bimetallic palladium catalysts in a two-chamber reactor, efficiently utilizing H-2 and selectively producing alkenes under mild reaction conditions. The Pd-based bimetallic catalysts show excellent catalytic performances for semihydrogenation of alkynes and dehydrogenation of formic acid in the two-chamber reactor.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Chemistry, Physical
Xin Zhang, Alan S. Lea, Anne M. Chaka, John S. Loring, Sebastian T. Mergelsberg, Elias Nakouzi, Odeta Qafoku, James J. De Yoreo, Herbert T. Schaef, Kevin M. Rosso
Summary: Understanding crystallization pathways at nanoscale under high pressure and temperature is challenging. This study used high-pressure atomic force microscopy to directly observe brucite carbonation in water-bearing supercritical carbon dioxide, revealing that the amorphous magnesium carbonate acts as a seed for the crystallization of nesquehonite. Additionally, in situ infrared and thermogravimetric-mass spectrometry analyses indicated the stoichiometry of the amorphous intermediate.
Article
Chemistry, Organic
Anshul Jain, Anitta Regina, Akanksha Kumari, Ranjan Patra, Manikandan Paranjothy, Nirmal K. Rana
Summary: Merrifield resin-anchored pyridines were prepared and used as reusable mediators for the trans-selective cascade synthesis of 2,3-dihydroindoles. The method involved the in situ formation of N-ylides followed by Michael substitution reactions. The simple pyridine also efficiently carried out the cascade reaction. The products were further converted into valuable compounds, and the supported pyridine was reused for multiple cycles. Density functional theory calculations confirmed the lower-energy trans-selectivity pathway.
Article
Chemistry, Multidisciplinary
Qian Xu, Thomas R. Hoye
Summary: This study reports the generation of a relatively rare reactive intermediate called alpha,3-dehydrotoluenes from isolable allenynes. The substructure motif in the allenyne substrates is distinct and complementary to other types of cycloisomerizations. The product profiles obtained under different reaction conditions provide insights into the electronic nature of the produced isomeric DHTs and reveal previously unobserved carbene-like reactivity of the DHT.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Inorganic & Nuclear
Yanjie Duan, Zhixiong Huang, Jingyu Ren, Xiangbin Dong, Qingsheng Wu, Runping Jia, Xiaowei Xu, Shaojun Shi, Sheng Han
Summary: This study investigates the crucial step of oxygen evolution reaction (OER) and synthesizes Mn3O4/PANI/NF composite material with excellent OER activity. The composite material exhibits low overpotential and high OER activity due to its stable structure and abundant active sites, outperforming commercial catalysts and other reported electrocatalysts.
DALTON TRANSACTIONS
(2022)
Article
Nanoscience & Nanotechnology
Sandip K. Pahari, Yit-Tsong Chen
Summary: This study investigates the formation of intermediates in electrocatalyst-assisted water splitting using a bifunctional mechanism, and confirms the role of functionalized carboxylates in improving catalytic efficiency through pH-dependent and isotope labeling experiments.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Organic
Hua-Xing Hu, Xin-Ru Ma, Qin Zhong, Qiang Chen, Jian Zhao
Summary: A novel homoallenylboration reaction has been developed for the efficient and practical synthesis of valuable homoallenyl alcohols. The reaction involves the activation of 2-pinacolateboryl 1,3-butadienes followed by the addition of aldehydes to give the desired products with high yields and excellent regioselectivity. Notably, this reaction can also be employed for the synthesis of homoallenyl tertiary alcohols.
ORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Multidisciplinary Sciences
Richard J. Lewis, Kenji Ueura, Xi Liu, Yukimasa Fukuta, Thomas E. Davies, David J. Morgan, Liwei Chen, Jizhen Qi, James Singleton, Jennifer K. Edwards, Simon J. Freakley, Christopher J. Kiely, Yasushi Yamamoto, Graham J. Hutchings
Summary: By using supported gold-palladium alloyed nanoparticles and a titanium silicate-1 catalyst, H2O2 can be generated in situ as needed, achieving high selectivity in the production of cyclohexanone oxime. This approach eliminates the need for transporting and storing highly concentrated, stabilized H2O2, leading to potential environmental and economic savings, as well as process intensification.
Article
Energy & Fuels
Xuerui Yi, Fengxiang Yin, Xiaobo He, Guoru Li
Summary: Reduction of NiO to obtain highly active OER catalyst CL-prNiO through hydrothermal method is able to significantly enhance the OER activity due to its hybrid and disordered structure.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Electrochemistry
Zhaoyang Sun, Yanling Zhai, Guoliang Mei, Weiwei Guo, Zijian Fang, Lei Jiao, Zhijun Zhu, Xiaoquan Lu, Jianguo Tang
Summary: In situ reduction of AgI to Ag nanoparticles supported on C-doped boron nitride (AgI/BN-C) was developed for CO2 electroreduction to CO. The enhanced performance, with a faradaic efficiency of 99.5% and a high current density of 56.3 mA cm-2, can be mainly attributed to the controllable construction of Ag0-Ag+ sites.
ELECTROCHIMICA ACTA
(2023)
Article
Engineering, Environmental
Sandip K. Pahari, Yit-Tsong Chen
Summary: A multifunctional catalyst, composed of phosphate-functionalized few-layer phosphorene (FLP-P) and bismuth ferrite (BFO) nanosheets (referred to as FLP-P-BFO), was fabricated for photoelectrochemical (PEC) water-splitting reactions. The catalyst exhibited excellent hydrogen evolution reaction (HER) activity at the cathode and high catalytic efficiency for the oxygen evolution reaction (OER) at the anode. The bifunctional mechanism of the catalyst was validated and showed potential for biomass upgrading to value-added products.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Multidisciplinary Sciences
Fen Zhao, Mehdi Abdellaoui, Wided Hagui, Maria Ballarin-Marion, Jerome Berthet, Vincent Corce, Stephanie Delbaere, Heloise Dossmann, Agathe Espagne, Jeremy Forte, Ludovic Jullien, Thomas Le Saux, Virginie Mouries-Mansuy, Cyril Ollivier, Louis Fensterbank
Summary: Photosensitization of organogold intermediates is an emerging field in catalysis. Researchers have discovered a gold-catalyzed reaction that produces 2,3-disubstituted indoles from specific substrates using visible-light irradiation without the need for an external photocatalyst. The reaction has a wide range of applications and involves the formation of emissive aggregates through the interaction of a potassium sulfonyl amide reactant, leading to photoactivation of the organogold intermediate.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Jianxiong Chen, Xiangyu Wang, Xi Cui, Yongyi Li, Yuqi Feng, Zhenwei Wei
Summary: In this study, a floating electrolytic electrospray ionization (FE-ESI) strategy was developed to perform electrochemical reactions and monitor intermediates using high-resolution mass spectrometry. Compared to previous methods, FE-ESI-MS allows individual modulation of electrolytic and electrospray processes, ensuring high sensitivity in detecting intermediates and universality in investigating redox reactions. This platform was successfully used to investigate the EC reductive coupling of p-tolylboronic acid and p-nitrotoluene, revealing the presence of nitrene intermediates and suggesting a potential mechanism involving nitrene formation in the EC process.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Cheol Hyoun Ahn, Nishad G. Deshpande, Ho Seong Lee, Hyung Koun Cho
Summary: Co-based metal-organic frameworks (Co-MOFs) have been studied as intermediate templates for highly catalytic oxygen evolution reaction. However, the electrocatalytic performance of Co-MOF-derived composites remains unsatisfactory due to insufficient active sites and the detachment of Co nanoparticles. In this study, an in-situ electrochemical treatment was proposed to modify the surface of Co nanoparticles, resulting in a core/shell structure with improved electrocatalytic properties. The electrochemically designed Co@NC composite showed excellent catalytic activity with desirable overpotential and Tafel slope, as well as long-term durability.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Jieping Chen, Xuzhong Shen, Zhan Lu
Summary: A cobalt-catalyzed Markovnikov-type hydroboration method has been developed for the synthesis of alpha-alkenyl boronates with good regioselectivity and atom economy. The new ligand used with the cobalt hydride catalyst facilitates the selective insertion of terminal alkynes into metal hydride bonds. This protocol shows excellent tolerance to functional groups and delivers valuable alkene derivatives efficiently.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Jiajing Li, Bing Yu, Zhan Lu
Summary: Imidazoline, as a structural analog of oxazoline, has gained significant attention in the rational design of chiral ligands due to its additional N-substituent allowing for fine-tuning of electronic and steric effects. Various chiral imidazoline ligands have been designed and employed in asymmetric organic reactions, expanding the applications of chiral synthesis.
CHINESE JOURNAL OF CHEMISTRY
(2021)
Review
Chemistry, Multidisciplinary
Jun Guo, Zhaoyang Cheng, Jianhui Chen, Xu Chen, Zhan Lu
Summary: Transition metal-catalyzed asymmetric hydro-functionalization has been a straightforward and atom-economic way to access valuable optically active products. While noble transition metals have dominated this field, the attention has recently shifted to first-row, earth-abundant transition metals for their economic and sustainable advantages. However, the limited availability of chiral ligand libraries remains a significant challenge in developing highly enantioselective versions for these earth-abundant metal catalyzed reactions.
ACCOUNTS OF CHEMICAL RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Zhaoyang Cheng, Jun Guo, Yufeng Sun, Yushan Zheng, Zhehong Zhou, Zhan Lu
Summary: This study presents a controllable cobalt-catalyzed sequential hydrosilylation/hydroboration reaction of arylacetylenes, achieving high regioselectivities for all possible regio-outcomes. Adjusting the ligands of cobalt catalysts combined with dual catalysis relay strategy is crucial for achieving regio-chemistry control, which may inspire further exploration in diversity-oriented synthesis involving multiple additions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Organic
Dongpo Lu, Peng Lu, Zhan Lu
Summary: A cobalt-catalyzed asymmetric reduction of β,β-dialkyl α,β-unsaturated esters using PMHS as a reductive reagent was reported, delivering esters with a chiral trialkyl carbon center at the β-position with high yield and high enantioselectivity. The chiral tridentate ligand OIP showed excellent performance in the asymmetric reduction, replacing the need for chiral bidentate ligands. This simple protocol utilizes readily available PMHS as a cost-effective and easy-to-handle reductive reagent for a wide range of substrates.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Peng Lu, Xiang Ren, Haofeng Xu, Dongpo Lu, Yufeng Sun, Zhan Lu
Summary: This study presents an iron-catalyzed highly enantioselective hydrogenation method for the synthesis of chiral alkanes from minimally functionalized 1,1-disubstituted alkenes. A novel chiral 8-oxazoline iminoquinoline ligand and its iron complex have been designed and synthesized to facilitate this transformation. The reaction is operationally simple, utilizing 1 atm of hydrogen gas, and demonstrates good functional group tolerance.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Tongtong Li, Xiaokai Cheng, Jiamin Lu, Huifeng Wang, Qun Fang, Zhan Lu
Summary: The asymmetric reductive arylation and alkenylation of benzylic chloride under photoredox/nickel dual catalysis using chiral BiIm ligand allows for the synthesis of 1,1-diaryl alkanes and aryl allylic compounds with good yield and stereo- and enantioselectivities. The method is compatible with various functional groups and shows promise in applications such as late-stage functionalization.
CHINESE JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Organic
Wenbo Liu, Yushan Zheng, Yihui Mao, Jieping Chen, Xiang Ren, Zhaoyang Cheng, Zhan Lu
Summary: A cobalt-catalyzed desymmetrizing isomerization of exocyclic alkenes to generate chiral 1-methylcyclohexene derivatives with good yields and enantioselectivities was reported. A novel chiral thiazolinyl iminoquinoline ligand and its cobalt complex were designed and synthesized to control the establishment of tertiary or quaternary carbon centers at a remote position. This protocol is operationally simple, and a model for the stereochemical outcome has been proposed.
Article
Multidisciplinary Sciences
Yufeng Sun, Jun Guo, Xuzhong Shen, Zhan Lu
Summary: In this study, a method for sequentially catalyzing alkynes with nitrogen and silicon atoms using a cobalt catalyst is presented. The method involves two catalytic cycles with different ligands, and demonstrates high efficiency, simple operation, and excellent functional group tolerance. The study also reveals a phenomenon of ligand relay, where certain ligands can capture metal ions from other ligands.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Chenhui Chen, Hongliang Wang, Tongtong Li, Dongpo Lu, Jiajing Li, Xie Zhang, Xin Hong, Zhan Lu
Summary: A cobalt-catalyzed asymmetric sequential hydroboration/isomerization/hydroboration reaction of 2-aryl vinylcyclopropanes was reported for the first time, yielding valuable chiral 1,5-bis(boronates) with good yields and excellent enantioselectivity. The reaction protocol was successfully applied for the synthesis of (-)-preclamol and chiral 1,2,5-triaryl alkanes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Organic
Jiajin Zhao, Guoxiong Xu, Xue Wang, Jiren Liu, Xiang Ren, Xin Hong, Zhan Lu
Summary: A cobalt-catalyzed multipositional isomerization of conjugated dienes using an 8-oxazoline iminoquinoline ligand has been reported. This reaction is simple and efficient, yielding disubstituted 1,3-dienes with good yields and stereoselectivity.
Article
Multidisciplinary Sciences
Jieping Chen, Jiale Ying, Zhan Lu
Summary: In this study, a cobalt-catalyzed selective hydroallylation reaction was developed to synthesize branched 1,4-dienes. The reaction exhibited excellent functional group tolerance and substrate scope, allowing for gram-scale reactions. The proposed mechanism was based on deuterium labeling experiment and kinetic studies.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Applied
Guan-Nan Li, Hao-Cong Li, Meng-Ru Wang, Zhan Lu, Bing Yu
Summary: A visible-light-induced acylation aromatization reaction of para-quinone methides to access alpha,alpha'-diarylated ketones using cheap and readily available carboxylic acids as acylating reagents via deoxygenation was developed. The method offers a simple and efficient approach to synthesis and shows a broad substrate scope, allowing for late-stage functionalization of drug molecules.
ADVANCED SYNTHESIS & CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Peng Lu, Hongliang Wang, Yihui Mao, Xin Hong, Zhan Lu
Summary: Investigation on asymmetric hydrogenation of olefins is vital for the synthesis of pharmaceutical molecules and chemical industry. A cobalt-catalyzed enantioconvergent hydrogenation method has been developed for common minimally functionalized E/Z-olefin mixtures.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Organic
Guan-Nan Li, Hao-Cong Li, Zhan Lu, Bing Yu
Summary: The direct coupling of benzoxazoles and amines was achieved through visible light irradiation and CuCl catalysis. Various aminated benzoxazoles were synthesized successfully under mild conditions using air as an oxidant.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2022)