Article
Multidisciplinary Sciences
Yali Zhou, Xingjun Xu, Hongwei Sun, Guanyu Tao, Xiao-Yong Chang, Xiangyou Xing, Bo Chen, Chen Xu
Summary: This study reports effective platinum catalysts for hydroalkoxylation and hydroamination of unactivated alkenes, accommodating various alkene substitution patterns and providing a foundation for rational design of chiral catalysts through detailed mechanistic investigations.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Hannah S. Slocumb, Shaozhen Nie, Vy M. Dong, Xiao-Hui Yang
Summary: This study demonstrates the first enantioselective hydroselenation of styrenes, accessing organoselenium building blocks with selectivity for the branched isomer. Through a Rh-hydride pathway, C-Se bonds can be formed with excellent regio- and enantiocontrol.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Organic
Mijin Kim, Young Ho Rhee
Summary: This article reports the catalytic asymmetric synthesis of hexahydro-furofuran-3-ol, a key fragment of HIV protease inhibitors, using sequential metal catalysis combining Pd-catalyzed asymmetric hydroalkoxylation of ene-alkoxyallene and ring-closing metathesis (RCM). This unprecedented and highly chemoselective approach allows for a unified access to pyranofuranol and furopyranol derivatives.
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
Energy & Fuels
Guanghua Wang, Xingchen Huang, Hong-Gang Liao, Shi-Gang Sun
Summary: The study successfully prepared one-dimensional porous nanowires with tailored NixS2/PtNi heterostructures through microstrain engineering, displaying superb HER electrocatalytic activity. The NiS2/PtNi catalyst showed significantly lower overpotentials for HER in both alkaline and acid media compared to a state-of-the-art commercial Pt/C catalyst. The engineered heterostructures with tailored electronic structure and abundant microstrains serve as active sites for HER, contributing to the boosted performance.
Article
Chemistry, Multidisciplinary
Rui Deng, Shuquan Wu, Chengli Mou, Jianjian Liu, Pengcheng Zheng, Xinglong Zhang, Yonggui Robin Chi
Summary: A novel carbene-catalyzed sulfonylation reaction between enone aryl aldehydes and sulfonyl chlorides has been disclosed, leading to the efficient installation of sulfone moieties. The NHC catalyst provides activation and stereoselectivity control on a very remote site of the enone aryl aldehyde substrates. Water plays a crucial role in modulating catalyst deactivation and reactivation routes involving reactions between NHC and sulfonyl chloride.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Tiphaine Richard, Walid Abdallah, Xavier Trivelli, Mathieu Sauthier, Clement Dumont
Summary: An effective method of grafting functionalities onto lignin based on glycerol carbonate has been developed using an efficient nickel-catalysed telomerisation reaction. This method allows lignin to have new reactive functions and reduces the glass transition temperatures of modified lignins, thereby expanding the application range of lignin-based resins.
Article
Polymer Science
Benjamin R. Kordes, Seema Agarwal
Summary: This study presents two new cyclic vinyl acetal (CVA) monomers that are investigated for their synthesis and homo- and copolymerization behavior with vinyl acetate (VAc) in emulsion polymerization, providing a new pathway for degradable polymers.
Article
Chemistry, Organic
Erhui Gao, Cheng Peng, Jingyi Zhang, Xiao-Na Wang, Junbiao Chang
Summary: An efficient metal-free hydroalkoxylation reaction of ynesulfonamides with esters is described, achieving high yields with complete regioselectivity and high to excellent stereoselectivity under the catalysis of TMSOTf.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2021)
Article
Chemistry, Analytical
Zhen Peng, Andrea Fiorani, Kazumi Akai, Michio Murata, Atsushi Otake, Yasuaki Einaga
Summary: This study systematically investigated the application of boron-doped diamond (BDD) electrodes as quasi-reference electrodes (QREs). It found that BDD electrodes with 1% boron and a hydrogen-terminated surface showed the best stability and linear response, suggesting their potential application as QREs in harsh environments or in vivo biological monitoring.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Organic
Xinhang Zhang, Hanyang Sun, Changhong Han, He Wang, Junpeng Zhang, Di Zhang, Bin Lin, Huiming Hua, Maosheng Cheng, Yongxiang Liu
Summary: The asymmetric total synthesis of neobraclactone C was achieved for the first time using a convergent synthetic strategy, with the longest linear sequence of 22 steps from known materials. Key steps of the synthesis include a steric hindrance/hydrogen bond dual-controlled Heck arylation reaction for the construction of hemiketal and cis-alkenyl in one step, as well as a CeCl3-catalyzed tricycle formation.
Article
Environmental Sciences
Xin Liu, Yaoyu Zhou, Jian Yang, Yuan Yang, Md. Mostafizur Rahman
Summary: Metal nanoparticles accumulation and bioavailability in plants, specifically the transformation and transportation of platinum nanoparticles and their ions in rice seedlings, were investigated in this study. Results showed that platinum ions can be biosynthesized into platinum nanoparticles in rice seedlings, and the particle size ranged from 75-79.3 nm in roots and 21.7-44.3 nm in shoots. Platinum nanoparticles could transfer to shoots while maintaining their original size distribution in roots, even with changes in dosage. Among all platinum species, PtNP-70 had the highest number-based bioconcentration factors (NBCFs), while Pt ions had the highest bioconcentration factors (BCFs). The findings provide insights into the influence of particle size and form on the transformations of platinum nanoparticles in the environment.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Biochemistry & Molecular Biology
Rauno Sedrik, Olivier Bonjour, Siim Laanesoo, Ilme Liblikas, Tonis Pehk, Patric Jannasch, Lauri Vares
Summary: Incorporating rigid cyclic acetal and ketal units into polymer structures is important for developing recyclable high-performance materials from renewable resources. In this study, citric acid was converted into di- and tricyclic diketones, which were then used to synthesize rigid spirodiols through ketalization. The resulting poly(beta-thioether ester ketal)s exhibited thermal stability and potential for chemical recycling.
Article
Chemistry, Multidisciplinary
Hayden M. Carder, Carolyn E. Suh, Alison E. Wendlandt
Summary: This study presents a concise method to access diverse deoxygenated carbohydrates without extensive use of protecting groups, demonstrating the potential for radical intermediates to facilitate selective carbohydrate transformations.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Inorganic & Nuclear
Qing Sun, Tian-Yu Deng, Jia-Jie Chen, Jia-Yi Liu, Xin Lu, Zhi-Xia Zhang, Jin-Heng Li
Summary: The mechanism of Au(i)-catalyzed intermolecular annulation of 2-(1-alkynyl)-2-alken-1-one with N-allenamide has been elucidated using DFT. The key intermediate, a gold all-carbon 1,3-dipole species, is more reactive than the gold allylic carbocation. The influence of ligands and substituents has been analyzed.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Miguel A. Sierra, Roberto Martinez-Alvarez
JOURNAL OF CHEMICAL EDUCATION
(2020)
Article
Chemistry, Inorganic & Nuclear
Marta G. Avello, Maria C. de la Torre, Andres Guerrero-Martinez, Miguel A. Sierra, Heinz Gornitzka, Catherine Hemmert
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2020)
Article
Chemistry, Inorganic & Nuclear
Maria L. Buil, Alba Collado, Miguel A. Esteruelas, Mar Gomez-Gallego, Susana Izquierdo, Antonio Nicasio, Enrique Onate, Miguel A. Sierra
Summary: Rhodium and iridium diolefin catalysts are used for the acceptorless and base-free dehydrogenation of secondary alcohols, and their degradation during the reactions has been investigated. The study of the reactivity of the dimers has shown complex structural changes.
Editorial Material
Chemistry, Multidisciplinary
Miguel A. Sierra
Summary: Anales de Quimica de la Real Sociedad Espanola de Quimica is the flagship journal of the Spanish Royal Society of Chemistry (RSEQ), focusing on articles, interviews, opinions, and review articles for non-specialist readers, with a special emphasis on chemistry education and history.
Article
Chemistry, Multidisciplinary
Fernando P. Cossio, Abel de Cozar, Miguel A. Sierra, Luis Casarrubios, Jaime G. Muntaner, Bimal K. Banik, Debasish Bandyopadhyay
Summary: Computational-experimental analysis has determined that the stereochemistry of the Staudinger reaction is closely associated with the nature of the imine, affecting the nucleophilic attack and electrocyclization steps. The impact of energetically accessible in situ isomerization patterns and substituents of the imine on the reaction's stereochemistry has been analyzed kinetically, with results supporting experimental findings.
Article
Chemistry, Inorganic & Nuclear
Sergio Aguado, Diego J. Vicent, Luis Casarrubios, Carmen Ramirez de Arellano, Miguel A. Sierra
Summary: This study prepared two series of silicon-supported hydrogenase mimics and nanostructures containing multiple mimics. These compounds were characterized and studied for their electrochemical properties. The results showed that these compounds were soluble in organic solvents and exhibited stable electrochemical behavior and electrocatalytic activity. Additionally, the integrity of the silicon cage was maintained even in the presence of acetic acid.
Article
Chemistry, Inorganic & Nuclear
Alejandro Torres, Alba Collado, Mar Gomez-Gallego, Carmen Ramirez de Arellano, Miguel A. Sierra
Summary: In this study, tetranuclear [Fe2S2] hydrogenase mimic complexes containing Pt(II), Ni(II), and Ru(II) complexes were synthesized and their electrochemical properties were investigated. The incorporation of metal complexes in the structure modulated the electronic communication between the redox-active [Fe2S2] centers. Specifically, the structure of the phosphine ligand in the Pt compounds played a crucial role in facilitating or hindering the electronic communication, while the addition of a Ru-bis(bipyridine) complex promoted the communication. These experimental and computational findings provide insights into the electronic interaction between redox-active centers in hydrogenase.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Carmen Lorenzo-Aparicio, Sonia Moreno-Blazquez, Montserrat Olivan, Miguel A. Esteruelas, Mar Gomez Gallego, Pablo Garcia-Alvarez, Javier A. Cabeza, Miguel A. Sierra
Summary: The synthesis of Pt pincer complexes derived from purine and purine nucleosides is reported. The complexes have different coordination points due to the structure of the purine skeleton and substituents on the phenyl ring. The complexes show regioselectivity and have potential applications as interstrand cross-linking models.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Alejandro Torres, Diego J. Vicent, Alba Collado, Mar Gomez-Gallego, Carmen Ramirez de Arellano, Miguel A. Sierra
Summary: A new phosphite ligand with three [(mu-ADT)RFe2(CO)6] (R= p-HOC6H4) moieties (2) was successfully synthesized by the reaction of [(mu-ADT)RFe2(CO)6] (R= p-HOC6H4) 1a with PCl3. Coordination of this phosphite to [PdCl2(MeCN)2] or [PtCl2(DMSO)2] resulted in the formation of heterometallic square planar complexes 5. Reaction of phosphite 2 with [MCl2Cp*]2 (M = Rh, Ir) yielded three-legged piano stool complexes 6. The versatility of this new ligand in forming different heteropolymetallic complexes under mild reaction conditions was demonstrated by the formation of complexes 5 and 6.
Article
Chemistry, Organic
Marta G. Avello, Maria Moreno-Latorre, Maria C. de la Torre, Luis Casarrubios, Heinz Gornitzka, Catherine Hemmert, Miguel A. Sierra
Summary: Triazolylidene MIC M-complexes (M = Au, Pd, Pt) with 2-azetidinones and penicillin G substituents at the triazole ring were synthesized and their catalytic properties were investigated.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Carmen Lorenzo-Aparicio, Mar Gomez Gallego, Carmen Ramirez de Arellano, Miguel A. Sierra
Summary: In this study, new types of neutral and cationic phosphorescent complexes derived from 6-phenylpurine nucleosides and nucleotides were prepared and studied. The neutral complexes exhibit orange-red emission upon photoexcitation, while the cationic complexes emit yellow-green light.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Alejandro Torres, Alba Collado, Mar Gomez-Gallego, Carmen Ramirez de Arellano, Miguel A. Sierra
Summary: TTF and exTTF-containing complexes were prepared by the photochemical reaction with [(??-S2)Fe2(CO)6]. These complexes can interact with PAHs, and exhibit an electrocatalytic dihydrogen evolution reaction under certain conditions. The presence of air influences the electrochemistry of these systems, suggesting potential for the design of hydrogenase mimics combining the properties of [FeFe] cores with unique TTF properties.
ACS ORGANIC & INORGANIC AU
(2022)
Review
Chemistry, Inorganic & Nuclear
Mar Gomez-Gallego, Miguel A. Sierra
Summary: Hydrogen production is crucial for carbon-free energy production, and using hydrogenase mimics is an important approach to enhance efficiency. The use of isotopes, such as deuterium, can help unravel key steps in hydrogen generation mechanisms.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Sergio Aguado, Luis Casarrubios, Carmen Ramirez de Arellano, Miguel A. Sierra
