Article
Agricultural Engineering
Sen-Wang Wang, Zhen-Hong He, Jian-Gang Chen, Shao-Yan Yang, Yuan-Yuan Wei, Kuan Wang, Weitao Wang, Xiaoxue Ma, Zhao -Tie Liu
Summary: Catalytic hydrogenolysis of aryl ethers is a green approach for utilizing lignin-derived biomass resources or aromatic plastics. Researchers synthesized cobalt-yttrium bimetallic catalysts and found that one of them exhibited good catalytic performance under mild conditions. The catalyst showed great potential for industrial application, as demonstrated by recycling and gram-scale experiments.
BIOMASS & BIOENERGY
(2022)
Article
Chemistry, Multidisciplinary
Nishamol Kuriakose, Sason Shaik
Summary: This study investigates the mechanistic pathways of aryl C-O bond activation in anisole catalyzed by a Rh-Al pincer-type complex at room temperature using DFT calculations. The research is also extended to Rh-E complexes based on Group 13 elements (E=B/Ga). The results reveal a preference for heterolytic cleavage pathway in the C-O bond activation, with calculated barriers ranging from 16 to 36 kcal/mol in the order: E=Al.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Zelun Zhao, Guang Gao, Yongjie Xi, Jia Wang, Peng Sun, Qi Liu, Wenjun Yan, Yi Cui, Zheng Jiang, Fuwei Li
Summary: In this study, a sustainable approach to produce valuable hydroxyalkanoates from cellulose-derived furans via coupling homogeneous carbonylation and heterogeneous hydrogenation was demonstrated. The use of 8Ni/CeO2 catalyst in the hydrogenation reaction showed high selectivity and stability.
Article
Chemistry, Multidisciplinary
Zhikun Peng, Zhixi Wu, Xiaotong Sun, Hongji Li
Summary: We developed a synergistic method combining photocatalytic hydrogen transfer with acid catalysis for H2-free hydrogenolysis of diphenyl ether and aromatic oxygenates at room temperature. The method achieved efficient conversion of diphenyl ether to aliphatic monomers (98% yield) and aromatic mixtures to cycloalkanes (57%) and aliphatic alcohols (9%) under mild conditions.
Article
Chemistry, Multidisciplinary
Rin Seki, Naofumi Hara, Teruhiko Saito, Yoshiaki Nakao
Summary: In this study, we reported a novel rhodium catalyst with X-type PAlP pincer ligand for catalytic reduction of a C-O bond and borylation. The reaction mechanism was revealed through characterization of reaction intermediate and deuterium-labeling experiments. This catalytic system demonstrated steric-hindrance-dependent chemoselectivity, providing a new strategy for selective C-O bond activation through heterobimetallic catalysis.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Inorganic & Nuclear
Guoqi Zhang, Haisu Zeng, Quan Tang, Selin Ates, Shengping Zheng, Michelle C. Neary
Summary: A study on the regioselective epoxide ring-opening through hydroboration catalysed by a vanadium(III) dialkyl complex supported by a redox-active terpyridine ligand is reported. The effective Markovnikov hydroboration of terminal epoxides led to the synthesis of secondary alcohols in high yields, demonstrating a new catalytic application of an earth-abundant vanadium(III) complex.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Fang Lin, Ho-Yin Tse, Hanno C. Erythropel, Predrag Petrovic, Mahlet Garedew, Jinshan Chen, Jason Chun-Ho Lam, Paul T. Anastas
Summary: This study reports a highly selective electrochemical method for the cleavage of benzylic C-O bond in lignin model compounds at room temperature and ambient pressure. Using nickel ions as catalysts in the presence of water molecules, benzyl phenyl ether (BPE) can be converted to toluene and phenol in methanol with high yields.
Article
Chemistry, Physical
Rita Raachini, Ferdaous Ben Romdhane, Capucine Sassoye, Maya Boutros, Franck Launay
Summary: This paper investigates the hydrogenolysis of 2-phenoxy-1-phenylethanone using different catalysts. The study reveals that although the bimetallic catalysts exhibit high metal dispersion, there is no synergy between the two metals. It is also found that the Ni-based catalyst shows better phenol productivity under reduction conditions at 650℃.
Article
Multidisciplinary Sciences
Jia Yu, Peng Zhang, Lulu Li, Kailang Li, Gong Zhang, Jia Liu, Tuo Wang, Zhi-Jian Zhao, Jinlong Gong
Summary: This paper describes a strategy of balancing the active sites for the generation and dimerization of ketyl intermediates by constructing bimetallic Pd/Cu electrocatalysts with tunable surface coverage of Pd, achieving high Faradaic efficiency and production rate of hydrobenzoin. Experimental and theoretical results show that Pd promotes the generation of ketyl intermediates, while Cu enhances their dimerization. The balance between these two sites facilitates the coupling of benzaldehyde towards hydrobenzoin.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Dong Ki Lee, Stephen R. Kubota, Aurora N. Janes, Michael T. Bender, Jongin Woo, J. R. Schmidt, Kyoung-Shin Choi
Summary: The study demonstrates how the adsorption energy of HMF on metal surfaces and the resulting changes in the intramolecular bond lengths of adsorbed HMF directly impact the reduction pathways of HMF through combined experimental and computational investigations, providing insights into a general trend in behaviors observed using various metal electrodes for HMF reduction.
Review
Chemistry, Multidisciplinary
Yueqing Wang, Hongxing Wang, Xiao Kong, Yulei Zhu
Summary: This review highlights recent advances in the thermocatalytic conversion of 5-hydroxymethylfurfural (HMF) into value-added chemicals, including hydrogenation, oxidation, and other reactions. The roles of metal properties, supports, and additives are discussed, along with challenges in this research area.
Article
Chemistry, Multidisciplinary
P. Sreejyothi, Pallavi Sarkar, Supriti Dutta, Arpan Das, Swapan K. Pati, Swadhin K. Mandal
Summary: This study reports the metal-free regioselective Markovnikov ring-opening of epoxides using an abnormal N-heterocyclic carbene (aNHC) to yield secondary alcohols with up to 99% selectivity. DFT calculations and X-ray crystallography suggest that the Markovnikov selectivity is attributed to the high nucleophilicity and steric factors of the aNHC.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Claudia E. Berdugo-Diaz, Yang Sik Yun, Melissa T. Manetsch, Jing Luo, David G. Barton, Xue Chen, David W. Flaherty
Summary: The direct reduction of esters to ethers offers an efficient pathway to obtain ethers from renewable intermediates. This study elucidates the reaction pathways of propyl acetate in the presence of hydrogen over Pd nanoparticles supported on high-surface area Nb2O5. The results show that esters react via three primary pathways, leading to the formation of different products. The formation of ethers is not affected by the pressure of C5H10O2 but is dependent on the pressure of H-2.
Article
Chemistry, Multidisciplinary
Xin Yuan, Kwanpyung Lee, Michael T. Bender, J. R. Schmidt, Kyoung-Shin Choi
Summary: This study elucidates the key mechanistic differences between hydrogenation and hydrogenolysis reactions and demonstrates that lowering the pH can promote the hydrogenolysis of aldehydes and alcohols.
Article
Multidisciplinary Sciences
Yuting Zhou, Grace E. Klinger, Eric L. Hegg, Christopher M. Saffron, James E. Jackson
Summary: This study presents a mild aqueous process using skeletal Ni cathodes for the electrocatalytic hydrogenolysis of diaryl ethers, which enables direct C-O cleavage without initial benzene ring saturation. The authors identified two distinct cleavage mechanisms and discovered the ability of acetone to control the product ring saturation. This research not only addresses the current bottleneck in biomass conversion, but also provides insights into defluorination reactions.
NATURE COMMUNICATIONS
(2022)
Review
Chemistry, Multidisciplinary
Dan He, Yawen Li, Fuwen Zhao, Yuze Lin
Summary: High trap density in organic solar cells leads to localized charge carriers and reduced carrier lifetime, limiting device efficiency. This feature article summarizes the recent advances of trap suppression by material design and device engineering.
CHEMICAL COMMUNICATIONS
(2024)
Review
Chemistry, Multidisciplinary
Olivier Monfort, Arshitha Madhusudhan, Martin Motola
Summary: This article presents the advantages of coupling photocatalysis and Fenton-based processes for environmental remediation and discusses their synergy. It critically examines the simultaneous triggering of these two processes and provides insights into research approaches. The study aims to enhance understanding of this complex process and highlight the potential integration of new catalysts in current wastewater treatment technology.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Manideepa Dhar, Chittaranjan Mishra, Avijit Das, Uttam Manna
Summary: An approach of 'polymerization of monomers in its aggregated form' has been introduced to tailor the water wettability of fibrous and porous substrates, achieving hydrophobicity to superhydrophobicity transition, as well as patterned wettability. This facile chemical method provides a durable coating with adjustable and patterned wettability for various potential applications.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Saswat Ranjan Bhoi, Chhanda Debnath, Shikha Gandhi
Summary: In this article, a novel catalytic reaction using Pd(0) and Bronsted acid is reported for the synthesis of biologically important imidazolidinone-fused N-heterocycles through redox-neutral intramolecular N-allylation of indoles and pyrroles with alkynes. This atom-economical method is applicable to a wide range of substrates and eliminates the need for leaving groups or oxidizing agents commonly used in traditional allylation reactions.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Longkun Chen, Mingshuai Zhang, Meichen Liu, Zhuoyuan Liu, Yuetong Qiu, Zhilai Zhang, Fuchao Yu, Jiuzhong Huang
Summary: In this study, an efficient Rh(III)-catalyzed selective mono- and dual-C-H bond functionalization/cyclization with iodonium ylide as the sole coupling partner was demonstrated. Fused benzodiazepine skeletons were obtained in excellent yields, providing an improved approach to dual C-H unsymmetrical functionalization.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Alice Kennett, Sven Epple, Gabriella van der Valk, Irene Georgiou, Evelyne Gout, Romain R. Vives, Angela J. Russell
Summary: This study presents the design and synthesis of sulfated disaccharide inhibitors based on IdoA(2S)-GlcNS(6S), which showed potent inhibition of Sulf-2. The results suggest that IdoA(2S)-GlcNS(6S) is the shortest fragment size required for effective inhibition of Sulfs, and a trisulfated disaccharide is identified as the minimal fragment size of heparan sulfate for effective endosulfatase inhibition.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Mauro Garbini, Andrea Brunetti, Riccardo Pedrazzani, Magda Monari, Massimo Marcaccio, Giulio Bertuzzi, Marco Bandini
Summary: The self-adaptability of galvanostatic electrolysis was found to be helpful in a multistage chemo- and diastereoselective electrochemically promoted cyclodimerization of chalcones. Through a series of reductive events, densely functionalized cyclopentanes with five contiguous stereocenters were obtained (25 examples, yields up to 95%, dr values up to >20:1). Further experimental and electrochemical investigations indicated the crucial role of dynamic kinetic resolution of the aldol intermediate in the reaction mechanism.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Dhananjay S. Nipate, Neha Meena, Prakash N. Swami, Krishnan Rangan, Anil Kumar
Summary: In this study, the synthesis of functionalized benzo[a]phenazines and indazolo[2,3-a]quinolines was achieved through Rh(III)-catalyzed oxidative annulation of 2-arylquinoxalines and 2-aryl-2H-indazoles with allyl alcohols. The method showed a wide substrate scope, excellent functional group tolerance, good to high yields of annulated products, and the capability for scaled-up synthesis. A tentative mechanism of the annulation reaction was proposed based on a preliminary mechanistic investigation.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Ruonan Zhang, Abudukadi Tudi, Xia Yang, Xuping Wang, Zhihua Yang, Shujuan Han, Shilie Pan
Summary: A new lead tellurium borate material with a unique fundamental building block [B4O10] was synthesized and found to exhibit high birefringence. The structure-property relationship was discussed using first-principles calculations.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Amresh Kumar Singh, Baishali Thakurta, Anupam Giri, Monalisa Pal
Summary: This study introduces three key concepts for the quick synthesis of large-scale high-quality 2D materials films and their utilization in device fabrication.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Reina Hagiwara, Shun Nishimura, Kosuke Okeyoshi
Summary: A copolymer-conjugated nanocatalytic system has been developed to improve electron transfer and enhance photoinduced H2 generation.
CHEMICAL COMMUNICATIONS
(2024)