ChemPlusChem最新文献_第5页

Preparation and Catalytic Properties of Gold Single-Atom and Cluster Catalysts Utilizing Nanoparticulate Mg-Al Layered Double Hydroxides. 利用纳米颗粒镁铝层状双氢氧化物制备金单原子和簇催化剂及其催化特性

IF 3 4区化学

ChemPlusChem Pub Date : 2024-10-11 DOI: 10.1002/cplu.202400465

Akihiro Nakayama, Ayano Yoshida, Chika Aono, Tetsuo Honma, Norihito Sakaguchi, Ayako Taketoshi, Takashi Fujita, Toru Murayama, Tetsuya Shimada, Shinsuke Takagi, Tamao Ishida

{"title":"Preparation and Catalytic Properties of Gold Single-Atom and Cluster Catalysts Utilizing Nanoparticulate Mg-Al Layered Double Hydroxides.","authors":"Akihiro Nakayama, Ayano Yoshida, Chika Aono, Tetsuo Honma, Norihito Sakaguchi, Ayako Taketoshi, Takashi Fujita, Toru Murayama, Tetsuya Shimada, Shinsuke Takagi, Tamao Ishida","doi":"10.1002/cplu.202400465","DOIUrl":"10.1002/cplu.202400465","url":null,"abstract":"Au single atoms and clusters were stabilized on Mg-Al layered double hydroxide nanoparticles (LDH NPs), and the obtained Au@LDH NPs were supported on SiO2 and CeO2. After hydrogen reduction, Au single atoms were found together with Au clusters on LDH/SiO2. In contrast to Au single-atom catalysts which are deposited in metal vacancies of oxide supports, the LDH NPs stabilize very small Au species despite the absence of metal vacancies. The obtained Au(0)@LDH/SiO2 catalyzed aerobic oxidation of alcohols, and Au single atoms maintained after the reaction. Given that only Au NPs were observed on bulk LDH, the abundant surface OH group of LDH NPs would contribute to stabilize Au, resulting in higher activity than Au/LDH-bulk. After calcination to transform LDH to mixed metal oxide (MMO), the obtained Au(0)@MMO/SiO2 also exhibited high catalytic activity. Moreover, Au(0)@LDH/CeO2 exhibited higher activity and excellent selectivity for hydrogenation of 4-nitrostyrene to 4-aminostyrene than conventional Au catalysts such as Au/CeO2 and Au/TiO2. We demonstrated that Au size can be minimized using LDH NPs, exhibiting high catalytic performance. The basic surface OH groups of LDH would be also beneficial for deprotonation of alcohols and heterolytic dissociation of H2 in the catalytic reactions.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202400465"},"PeriodicalIF":3.0,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142398817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Catalytic Transformation of Biomass into Sustainable Carbocycles: Recent Advances, Prospects, and Challenges. 生物质催化转化为可持续碳环：最新进展、前景和挑战》。

IF 3 4区化学

ChemPlusChem Pub Date : 2024-10-11 DOI: 10.1002/cplu.202400568

Saikat Dutta

引用次数: 0

Expression of Concern: Reduced Graphene Oxide Nanosheets Decorated with Au Nanoparticles as an Effective Bactericide: Investigation of Biocompatibility and Leakage of Sugars and Proteins 表达关切：用金纳米粒子装饰的还原氧化石墨烯纳米片是一种有效的杀菌剂：糖和蛋白质的生物相容性与渗漏研究

IF 3 4区化学

ChemPlusChem Pub Date : 2024-10-10 DOI: 10.1002/cplu.202480149

{"title":"Expression of Concern: Reduced Graphene Oxide Nanosheets Decorated with Au Nanoparticles as an Effective Bactericide: Investigation of Biocompatibility and Leakage of Sugars and Proteins","authors":"","doi":"10.1002/cplu.202480149","DOIUrl":"https://doi.org/10.1002/cplu.202480149","url":null,"abstract":"N. Hussain, A. Gogoi, R. Sarma, P. Sharma, A. Barras, R. Boukherroub, R. Saikia, P. Sengupta, and M. Das, “Reduced Graphene Oxide Nanosheets Decorated with Au Nanoparticles as an Effective Bactericide: Investigation of Biocompatibility and Leakage of Sugars and Proteins,” ChemPlusChem 79, no. 12 (2014): 1774–1784, https://doi.org/10.1002/cplu.201402240.This Expression of Concern is for the above article, published online on 2 October 2014, in Wiley Online Library (wileyonlinelibrary.com), and has been published by agreement between the journal′s Editor-in-Chief, Axel Straube; Chemistry Europe; and Wiley-VCH GmbH, following an investigation from Wiley's Integrity in Publishing Group. The Expression of Concern has been agreed due to concerns raised by a third party after publication regarding the similarity of images in Figure 9 and the underlying data that they represent. The authors shared their original data, but were unable to provide a satisfactory explanation to the concerns. An investigation by the CNRS and Université Lille is ongoing. The journal is issuing this Expression of Concern because the concerns regarding the integrity of the data and the results presented cannot be resolved at this time.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":"89 11","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cplu.202480149","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142666005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Orbital-Driven Insights into Enantioselective Hydrofunctionalization of Alkenes Catalyzed by Co-Salen Complexes: Study on Singlet and Triplet States. 共盐络合物催化烯的对映体选择性氢功能化的轨道驱动见解：单重态和三重态研究。

IF 3 4区化学

ChemPlusChem Pub Date : 2024-10-10 DOI: 10.1002/cplu.202400393

Shivangi Gupta, Parveen Rawal, Puneet Gupta

{"title":"Orbital-Driven Insights into Enantioselective Hydrofunctionalization of Alkenes Catalyzed by Co-Salen Complexes: Study on Singlet and Triplet States.","authors":"Shivangi Gupta, Parveen Rawal, Puneet Gupta","doi":"10.1002/cplu.202400393","DOIUrl":"10.1002/cplu.202400393","url":null,"abstract":"The Co(salen) ([LCo(II)]) mediated hydrofunctionalization of alkenes is a highly significant method for forming enantioselective products. In this work, we conducted comprehensive computational investigations to gain insights of the reaction mechanism. The orbital analysis and intrinsic bond orbital analysis (IBO) were utilized to unravel the flow of electrons during the progress of the reaction. We explored various spin state surfaces to understand the possible pathways for the reaction. Initially, [LCo(II)] reacts with an oxidant tertbutyl peroxybenzoate, yielding [LCo(III)OC(O)Ph] and [LCo(III)OtBu]. Subsequently, [LCo(III)OC(O)Ph] reacts with silane to form cobalt hydride ([LCo(III)H]), with the triplet spin state surface being the preferred pathway, featuring an energy barrier of 14.2 kcal mol-1. IBO analysis across this step revealed that it involves the transfer of hydrogen as a hydride. Subsequently, the [LCo(III)H] complex in a triplet spin state undergoes a minimum energy crossing point (MECP) to transition into the singlet spin state, representing its most stable configuration. The [LCo(III)H] complex further reacts with styrene via hydrogen atom transfer on the singlet spin state surface, followed by oxidation and subsequent reaction with indole on the doublet spin surface to yield the hydrofunctionalized product. This work also explores potential enantioselective steps in the reaction.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202400393"},"PeriodicalIF":3.0,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142398816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modification Strategies and Prospects for Enhancing the Stability of Black Phosphorus. 增强黑磷稳定性的改造策略和前景。

IF 3 4区化学

ChemPlusChem Pub Date : 2024-10-09 DOI: 10.1002/cplu.202400552

Haohao Zhang, Chaoyue Shan, Koulong Wu, Mingyuan Pang, Zhen Kong, Jiajia Ye, Wensi Li, Lei Yu, Zhao Wang, Yen Leng Pak, Juan An, Xing Gao, Jibin Song

{"title":"Modification Strategies and Prospects for Enhancing the Stability of Black Phosphorus.","authors":"Haohao Zhang, Chaoyue Shan, Koulong Wu, Mingyuan Pang, Zhen Kong, Jiajia Ye, Wensi Li, Lei Yu, Zhao Wang, Yen Leng Pak, Juan An, Xing Gao, Jibin Song","doi":"10.1002/cplu.202400552","DOIUrl":"10.1002/cplu.202400552","url":null,"abstract":"Black phosphorus is a two-dimensional layer material with promising applications due to its many excellent physicochemical properties, including high carrier mobility, ambipolar field effect and unusual in-plane anisotropy. Currently, BP has been widely used in biomedical engineering, photocatalysis, semiconductor devices, and energy storage electrode materials. However, the unique structure of BP makes it highly chemically active, leading to its easy oxidation and degradation in air, which limits its practical applications. Recently, researchers have proposed a number of initiatives that can address the environmental instability of BP, and the application of these physical and chemical passivation techniques can effectively enhance the environmental stability of BP, including four modification methods: covalent functionalization, non-covalent functionalization, surface coordination, physical encapsulation and edge passivation. This review highlights the mechanisms of the above modification techniques in addressing the severe instability of BP in different application scenarios, as well as the advantages and disadvantages of each method. This review can provide guidance for more researchers in studying the marvellous properties of BP and accelerate the practical application of BP in different fields.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202400552"},"PeriodicalIF":3.0,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142386685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Combination energetic materials consisting of strained rings combined with high heat of formation tetrazoles. 由应变环和高形成热四氮唑组成的组合能量材料。

IF 3 4区化学

ChemPlusChem Pub Date : 2024-10-09 DOI: 10.1002/cplu.202400164

Jake E Zuckerman, Montgomery C St Myer, Matthias Zeller, Davin G Piercey

引用次数: 0

Design of PtSn Nanocatalysts for Fuel Cell Applications. 设计用于燃料电池的 PtSn 纳米催化剂。

IF 3 4区化学

ChemPlusChem Pub Date : 2024-10-09 DOI: 10.1002/cplu.202400151

Monica Distaso, Erika Abella

{"title":"Design of PtSn Nanocatalysts for Fuel Cell Applications.","authors":"Monica Distaso, Erika Abella","doi":"10.1002/cplu.202400151","DOIUrl":"https://doi.org/10.1002/cplu.202400151","url":null,"abstract":"The challenges in the fuel cell industry lie in the cost, performance, and durability of the electrode components, especially the platinum-based catalysts. Alloying has been identified as an effective strategy to reduce the cost of the catalyst and increase its efficiency and durability. So far, most studies focused on the design of PtM bimetallic nanocatalyst, where M is a transition metal. The resulting PtM materials show higher catalytic activity, but their stability remained challenging. In addition, most of the transition metals M are expensive or low abundant. Tin (Sn) has gained attention as alloying element due to its versatility in manufacturing both anode and cathode electrodes. If used as anode catalyst, it is able to overcome poisoning from CO and related intermediates. As cathode catalyst, it improves the kinetics of the oxygen reduction reaction (ORR). Additionally, Sn is an abundant and cheap element. The current contribution outlines the state of the art on the alloy and shape effect on PtSn activity and stability, demonstrating its high potential to develop cheaper, more efficient and durable catalysts for fuel-cell electrodes. Additionally, in situ analytical and spectroscopic studies can shed light on the elementary steps involved in the use of PtSn catalytic systems. Finally, this intriguing material can be used as a parent system for the synthesis of high-entropy-alloys and intermetallics materials.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202400151"},"PeriodicalIF":3.0,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142386684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Conjugation Paths in Oxatriphyrin(2.1.1) - C2 Bridge Modifications. Oxatriphyrin(2.1.1) 的共轭途径 - C2 桥修饰。

IF 3 4区化学

ChemPlusChem Pub Date : 2024-10-05 DOI: 10.1002/cplu.202400636

Kevin Dalberto, Krzysztof Dzieszkowski, Łukasz Orzeł, Piotr J Chmielewski, Miłosz Pawlicki

引用次数: 0

L1₀-PtCo and L1₂-Pt₃Co Intermetallics for Oxygen Reduction Reaction: The Influence of Composition and Structure on Properties. 用于氧还原反应的 L10-PtCo 和 L12-Pt3Co 金属间化合物：成分和结构对性能的影响。

IF 3 4区化学

ChemPlusChem Pub Date : 2024-10-04 DOI: 10.1002/cplu.202400322

Mingwang Lu, Yuekun Hu, Guanhua Zhang, Xiaowei Zhao, Xiaojing Yang, Xiaofei Yu, Xinghua Zhang, Zunming Lu, Yan Liu, Lanlan Li

{"title":"L10-PtCo and L12-Pt3Co Intermetallics for Oxygen Reduction Reaction: The Influence of Composition and Structure on Properties.","authors":"Mingwang Lu, Yuekun Hu, Guanhua Zhang, Xiaowei Zhao, Xiaojing Yang, Xiaofei Yu, Xinghua Zhang, Zunming Lu, Yan Liu, Lanlan Li","doi":"10.1002/cplu.202400322","DOIUrl":"10.1002/cplu.202400322","url":null,"abstract":"Pt-based intermetallics are regarded as highly efficient electrocatalysts for oxygen reduction reaction (ORR). However, Pt-based intermetallics with different Pt: M atomic ratios have different atomic arrangements and crystal structures, which will change the electronic structure and coordination environment of Pt, thus affecting the electrocatalytic activity. In this work, we prepared L12-Pt3Co and L10-PtCo intermetallic catalysts by modulating the molar ratio of Pt and Co precursors using a thermal annealing method. The mass activity (MA) of L10-PtCo is 0.52 A mg-1 Pt at 0.9 V, which is 1.44 times larger than that of L12-Pt3Co (0.36 A mg-1 Pt). In addition, the MA of L10-PtCo decreases by 17.31 % after 10,000 CV cycles, which is smaller than that of L12-Pt3Co (25.00 % loss in MA), showing excellent structural stability. Theoretical calculations reveal that compared to L12-Pt3Co, L10-PtCo has more electrons transferred to the Pt sites, which further optimizes the electronic structure of Pt and reduces the d-band center, leading to the increase of the electrocatalytic performance. This work provides new insights into the study of Pt-based intermetallics with different Pt: M ratios, which is helpful for the screening and preparation of high-performance Pt-based intermetallics.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202400322"},"PeriodicalIF":3.0,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142374746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Aluminum Fluorides as Noncovalent Lewis Acids in Proteins: The Case of Phosphoryl Transfer Enzymes. 氟化铝作为蛋白质中的非共价路易斯酸：磷酰转移酶的案例。

IF 3 4区化学

ChemPlusChem Pub Date : 2024-10-04 DOI: 10.1002/cplu.202400578

Sergi Burguera, Lenin Vidal, Antonio Bauzá

{"title":"Aluminum Fluorides as Noncovalent Lewis Acids in Proteins: The Case of Phosphoryl Transfer Enzymes.","authors":"Sergi Burguera, Lenin Vidal, Antonio Bauzá","doi":"10.1002/cplu.202400578","DOIUrl":"10.1002/cplu.202400578","url":null,"abstract":"The Protein Data Bank (PDB) was scrutinized for the presence of noncovalent O ⋅ ⋅ ⋅ Al Triel Bonding (TrB) interactions, involving protein residues (e. g. GLU and GLN), adenosine/guanine diphosphate moieties (ADP and GDP), water molecules and two aluminum fluorides (AlF3 and AlF4 -). The results were statistically analyzed, revealing a vast number of O ⋅ ⋅ ⋅ Al contacts in the active sites of phosphoryl transfer enzymes, with a marked directionality towards the Al σ-/π-hole. The physical nature of the TrBs studied herein was analyzed using Molecular Electrostatic Potential (MEP) maps, the Quantum Theory of Atoms in Molecules (QTAIM), the Non Covalent Interaction plot (NCIplot) visual index and Natural Bonding Orbital (NBO) studies. As far as our knowledge extends, it is the first time that O ⋅ ⋅ ⋅ Al TrBs are analyzed within a biological context, participating in protein trapping mechanisms related to phosphoryl transfer enzymes. Moreover, since they are involved in the stabilization of aluminum fluorides inside the protein's active site, we believe the results reported herein will be valuable for those scientists working in supramolecular chemistry, catalysis and rational drug design.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202400578"},"PeriodicalIF":3.0,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142370376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0