IF 3.9 3区化学

ChemCatChem Pub Date : 2026-04-17 DOI: 10.1002/cctc.202501855

Jiaxin Yu, Shuangxi Jing, Wei Xiao, Lin Zhuang

{"title":"Modulated Oxygen Reduction Activity on Ordered Mesoporous Nitrogen-doped Carbon-supported Co–Mn Spinel Oxide for Electrochemical Carbon Dioxide Capture","authors":"Jiaxin Yu, Shuangxi Jing, Wei Xiao, Lin Zhuang","doi":"10.1002/cctc.202501855","DOIUrl":"https://doi.org/10.1002/cctc.202501855","url":null,"abstract":"<div>\u0000 \u0000 Electrochemical CO2 capture technology holds promise for CO2 utilization from industrial flue gases. However, its practical application is currently hindered by the lack of efficient and CO-tolerant cathodic catalysts for the oxygen reduction reaction (ORR). In this work, we propose an electronic structure modulation strategy to enhance the ORR activity of CO-tolerant Co2MnO4 catalyst by ordered mesoporous nitrogen-doped carbon (OMNC). The promoted charge transfer from Co2MnO4 to OMNC leads to an upshifted d-band center. This electronic modulation is accompanied by excellent ORR performance with a half-wave potential of 0.791 V and a high diffusion limited current density of 5.889 mA cm−2. The catalyst enables efficient high-purity CO2 production (98.6%) in a membrane electrode assembly electrolyzer, with minimal voltage increase under CO-containing atmosphere. This achievement highlights the significance of electronic structure engineering in designing robust ORR catalysts for practical electrochemical CO2 capture systems.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 8","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147708299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Synergistic NiO–Mn2O3 Composite Thin Films via Facile Dip-Coating: A Cost-Effective and Stable Electrocatalyst for Methanol Oxidation in Alkaline Direct Methanol Fuel Cells 通过易浸涂的协同NiO-Mn2O3复合薄膜：一种经济、稳定的碱性直接甲醇燃料电池甲醇氧化电催化剂

IF 3.9 3区化学

ChemCatChem Pub Date : 2026-04-17 DOI: 10.1002/cctc.70726

Ujala Zafar, Abrar Hussain, Mahnoor Baloch, Khurram Shahzad, Khaled Chawraba, Muhammad Adil Mansoor, Mudassir Iqbal, Sang Hyun Park

{"title":"Synergistic NiO–Mn2O3 Composite Thin Films via Facile Dip-Coating: A Cost-Effective and Stable Electrocatalyst for Methanol Oxidation in Alkaline Direct Methanol Fuel Cells","authors":"Ujala Zafar, Abrar Hussain, Mahnoor Baloch, Khurram Shahzad, Khaled Chawraba, Muhammad Adil Mansoor, Mudassir Iqbal, Sang Hyun Park","doi":"10.1002/cctc.70726","DOIUrl":"https://doi.org/10.1002/cctc.70726","url":null,"abstract":"The commercialization of direct methanol fuel cells (DMFCs) is hindered by the high cost, limited durability, and sluggish kinetics of platinum-based catalysts. To address these challenges, NiO/FTO, Mn2O3/FTO, and NiO–Mn2O3/FTO thin films were fabricated using a simple and low-cost dip-coating method. Structural and compositional analyses using SEM and EDS confirmed the formation of uniform and porous morphologies, while XRD and Raman spectroscopy verified the crystalline nature and phase formation of the materials. Among the prepared electrodes, the NiO– Mn2O3/FTO composite exhibited superior electrocatalytic activity for methanol oxidation, delivering a prominent anodic peak at 0.99 V and a maximum current density of 5.8 mA cm−2. At 0.65 V, it achieved a current density of 2.5 mA cm−2 in 1.4 M methanol at a scan rate of 100 mV s−1. Chronoamperometric measurements demonstrated good electrochemical stability, with 86% current retention after 2000 s. Electrochemical impedance spectroscopy further confirmed the enhanced charge-transfer capability, showing a significantly lower charge-transfer resistance (Rct) of 71 Ω compared with 349 Ω for NiO and 517 Ω for Mn2O3 electrodes. Overall, the NiO–Mn2O3/FTO thin film offers a cost-effective, stable, and efficient catalytic system, demonstrating strong potential as an alternative anode material for DMFC applications.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 8","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.70726","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147708301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Tea Polyphenol-Derived Carbon-Modified TiO2 With Ti─O─C Bonding for Enhanced Photocatalytic Degradation of Toluene 茶多酚碳修饰Ti─O─C键增强光催化降解甲苯的TiO2

IF 3.9 3区化学

ChemCatChem Pub Date : 2026-04-17 DOI: 10.1002/cctc.70734

Xinyu Wang, Jiayu Guo, Yulu Xu, Pengcheng Wang, Juan Deng, Xi Wang, Yuxue Wei, Fang Chen, Zhimin Song, Mengdie Cai, Song Sun

{"title":"Tea Polyphenol-Derived Carbon-Modified TiO2 With Ti─O─C Bonding for Enhanced Photocatalytic Degradation of Toluene","authors":"Xinyu Wang, Jiayu Guo, Yulu Xu, Pengcheng Wang, Juan Deng, Xi Wang, Yuxue Wei, Fang Chen, Zhimin Song, Mengdie Cai, Song Sun","doi":"10.1002/cctc.70734","DOIUrl":"https://doi.org/10.1002/cctc.70734","url":null,"abstract":"<div>\u0000 \u0000 TiO2 generally exhibits unsatisfactory photocatalytic degradation and mineralization efficiency toward volatile organic compounds (VOCs). A major limitation lies in the severe recombination of photogenerated charge carriers before they react with surface hydroxyl groups to generate hydroxyl (•OH) radicals, the primary active species for VOCs oxidation. In this work, we fabricated a tea polyphenol-derived carbon layer-modified TiO2 (TPC-TiO2) via a sol-gel method, forming a unique Ti─O─C interfacial channel that facilitates efficient charge transfer. This structure significantly accelerates charge separation and migration toward the surface, favoring •OH generation. The formation of Ti─O─C bonds and enhanced charge dynamics are verified by in situ DRIFTS, photocurrent responses, and theoretical calculations. Under UV irradiation, TPC-TiO2 achieves a toluene degradation efficiency of 96.7%, much higher than 80.1% for pure TiO2, and the mineralization rate is significantly improved from 14.0% (for TiO2) to 42.1% (TPC-TiO2), nearly threefold enhancement. TPC-TiO2 also exhibits excellent cycling stability. This green bio-inspired modification optimizes interfacial charge dynamics and offers a promising strategy for efficient VOCs purification in industrial and indoor air remediation.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 8","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147708300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Computational Insights Into Enantioselectivity Differences in Pseudoenantiomeric Cinchona Alkaloid-Catalyzed Imine Umpolung Michael Additions 假对映体金鸡纳生物碱催化亚胺Umpolung Michael加成物对映体选择性差异的计算分析

IF 3.9 3区化学

ChemCatChem Pub Date : 2026-04-15 DOI: 10.1002/cctc.70727

Gan-Lu Qian, Shuo-Qing Zhang, Xin Hong

{"title":"Computational Insights Into Enantioselectivity Differences in Pseudoenantiomeric Cinchona Alkaloid-Catalyzed Imine Umpolung Michael Additions","authors":"Gan-Lu Qian, Shuo-Qing Zhang, Xin Hong","doi":"10.1002/cctc.70727","DOIUrl":"https://doi.org/10.1002/cctc.70727","url":null,"abstract":"<div>\u0000 \u0000 Pseudoenantiomeric cinchona alkaloid-derived organocatalysts offer one of the most widely applied approaches to synthesize both enantiomers of target products. Although the catalyst pairs differ only subtly in the position of the vinyl group, various studies have revealed the uneven chiral induction ability between them. This phenomenon remains unexplained by current computed stereochemical models. We herein report DFT calculations on the imine umpolung Michael addition reaction between a trifluoromethyl imine and an α,β-unsaturated N-acyl pyrrole, which is catalyzed by catalysts quinidinium QD and its pseudoenantiomeric catalyst quininium Q. New stereochemical models are established to elucidate the weak bonding interactions governing substrate-catalyst binding, including π–π stacking and N+–CH···O ion-pairing interactions. The calculated ΔΔG‡ values successfully reproduce the change in enantioselectivity associated with the different vinyl positions in the pseudoenantiomeric catalysts. These models successfully rationalize the long-standing “vinyl effect” observed in cinchona alkaloid-derived pseudoenantiomeric catalysts.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 8","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147686205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Electron-Rich Bismuth Enabled π-Backdonation in Ni–Bi2MoO6 for Efficient Ammonia Synthesis 富电子铋使Ni-Bi2MoO6的π-反捐赠高效合成氨

IF 3.9 3区化学

ChemCatChem Pub Date : 2026-04-15 DOI: 10.1002/cctc.202600007

Qiang Zhao, Wenbo Zheng, Shuowen Wang, Xihe Huang, Jingyao Wu, Huizhi Su, Ying Wang, Jinlin Long

{"title":"Electron-Rich Bismuth Enabled π-Backdonation in Ni–Bi2MoO6 for Efficient Ammonia Synthesis","authors":"Qiang Zhao, Wenbo Zheng, Shuowen Wang, Xihe Huang, Jingyao Wu, Huizhi Su, Ying Wang, Jinlin Long","doi":"10.1002/cctc.202600007","DOIUrl":"https://doi.org/10.1002/cctc.202600007","url":null,"abstract":"<div>\u0000 \u0000 The inherent high activation energy barrier of the N2 molecule severely impedes the practical application of electrocatalytic nitrogen reduction reaction (NRR). To overcome this bottleneck, this study employs a Ni2+ doping strategy to precisely modulate the electronic structure of bismuth molybdate, inducing the formation of electron-rich sites on adjacent Bi3+ ions and transforming them into efficient π-backdonation donor centers. This significantly accelerates electron transfer into the N2 antibonding orbitals, promoting N2 activation. Consequently, under 0.1 M HCl electrolyte and an applied potential of −0.2 V versus RHE, the catalyst achieves an exceptional ammonia yield of 92.3 µg mg−1 h−1 and a Faradaic efficiency of 72.6%, surpassing the performance of most reported NRR catalysts. In situ diffuse reflectance Fourier transform infrared spectroscopy confirms the π-backdonation mechanism is crucial for efficient N≡N bond activation, while cycling tests highlight the material's outstanding stability. This work lays the groundwork for developing highly efficient and selective NRR catalysts and significantly advances sustainable ammonia synthesis technologies.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 8","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147686174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Electrospun PAN-Derived Carbon Nanofibers Embedded With NiCoFeW-Based High-Entropy Oxides for Electrocatalytic Oxygen Evolution Reaction 电纺丝pan衍生碳纳米纤维包埋nicofew基高熵氧化物用于电催化析氧反应

IF 3.9 3区化学

ChemCatChem Pub Date : 2026-04-15 DOI: 10.1002/cctc.70740

Alireza Noroozi, Hossein Mahdavi, M. Baris Yagci, Mohammad Mahdi A. Shirazi, Saeed Bazgir, Hadi Jahangiri, Uğur Ünal

{"title":"Electrospun PAN-Derived Carbon Nanofibers Embedded With NiCoFeW-Based High-Entropy Oxides for Electrocatalytic Oxygen Evolution Reaction","authors":"Alireza Noroozi, Hossein Mahdavi, M. Baris Yagci, Mohammad Mahdi A. Shirazi, Saeed Bazgir, Hadi Jahangiri, Uğur Ünal","doi":"10.1002/cctc.70740","DOIUrl":"https://doi.org/10.1002/cctc.70740","url":null,"abstract":"High-entropy oxides composed of Ni, Co, Fe, W, and a fifth transition element (Mo, Mn, or Cu) were integrated into electrospun polyacrylonitrile nanofibers to form porous nitrogen-doped carbon membranes for the oxygen evolution reaction. Gas-assisted electrospinning enabled uniform dispersion of high-entropy oxide nanoparticles within the polyacrylonitrile matrix, while calcination at 800°C produced conductive carbon frameworks embedding crystalline high-entropy oxides with homogeneous elemental distribution. Structural and surface analyses confirmed the preservation of high-entropy oxide phases, catalytic graphitization of the carbon matrix, and strong interfacial bonding between metal oxides and carbon. Among all compositions, Mo-HEO@NC exhibited the lowest overpotential (≈240 mV at 10 mA cm−2) and smallest charge-transfer resistance (≈2177 Ω), outperforming Cu- and Mn-containing counterparts. The enhanced activity originated from Mo-induced electronic modulation, increased oxygen-vacancy density, and accelerated charge transport. The combination of multicomponent high-entropy oxides with electrospun N-doped carbon nanofibers establishes a robust route toward efficient, earth-abundant oxygen evolution reaction electrocatalysts with high stability and tunable electronic properties.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 8","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.70740","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147686204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Front Cover: Substrate Scope Expansion of Tryptophan Synthase for the Chemo-Enzymatic Synthesis of Non-Canonical Tryptophans (ChemCatChem 7/2026) 封面：色氨酸合成酶用于非典型色氨酸化学酶合成的底物范围扩展（ChemCatChem 7/2026）

IF 3.9 3区化学

ChemCatChem Pub Date : 2026-04-08 DOI: 10.1002/cctc.70733

Celeste Nobbio, Dario Allevi, Antonia Iazzetti, Giancarlo Fabrizi, Antonella Goggiamani, Davide Tessaro, Fabio Parmeggiani

引用次数: 0

Recent Progress on Photoelectrochemical Biomass-Derived Platform Molecules Conversion Coupled With Hydrogen Evolution 光电化学生物质衍生平台分子转化耦合析氢研究进展

IF 3.9 3区化学

ChemCatChem Pub Date : 2026-04-06 DOI: 10.1002/cctc.202600012

Yuqing Wei, Wenya Zeng, Jin-Bo Pan, Liqiang Zhao, Daojian Cheng

{"title":"Recent Progress on Photoelectrochemical Biomass-Derived Platform Molecules Conversion Coupled With Hydrogen Evolution","authors":"Yuqing Wei, Wenya Zeng, Jin-Bo Pan, Liqiang Zhao, Daojian Cheng","doi":"10.1002/cctc.202600012","DOIUrl":"10.1002/cctc.202600012","url":null,"abstract":"<div>\u0000 \u0000 The photoelectrochemical (PEC) oxidation and reduction processes are a sustainable method for generating high-value compounds and sustainable hydrogen. In a typical photoelectrochemical system for water splitting, the photocathode undergoes a reduction reaction to produce hydrogen, while the product on the anode is oxygen. As well, the kinetics of the photoanodic response in this process are slow, which reduces the efficiency of hydrogen evolution. Based on research, photoelectrochemical technology has the potential to be applied in the conversion of biomass-derived platform molecules. Through PEC conversion, biomass-derived platform molecules can not only enhance hydrogen production efficiency but also generate valuable chemicals as byproducts. This review primarily focuses on the PEC conversion of alcohols, phenols, aldehydes, lignin, and other biomasses, and explores the different mechanisms that facilitate the synergistic evolution of hydrogen. Additionally, we examine the prospects and challenges in this research field while summarizing the current state of PEC technology in biomass conversion and hydrogen evolution.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 7","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147668041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

By Magnetic-Electric Field Induction of Ni─O─Fe Heterogeneous Oxygen Bridge Structure to Promote the Formation of *OH and to Enhance Urea Oxidation Reaction 通过磁场感应制备Ni─O─Fe非均相氧桥结构，促进*OH的形成，增强尿素氧化反应

IF 3.9 3区化学

ChemCatChem Pub Date : 2026-04-06 DOI: 10.1002/cctc.70706

Zhenhao Zong, Shengqiang Xue, Jun Wang, Haoming Ma, Lingling Zhou, Wen Liu, Honglei Wang, Changping Yang

{"title":"By Magnetic-Electric Field Induction of Ni─O─Fe Heterogeneous Oxygen Bridge Structure to Promote the Formation of *OH and to Enhance Urea Oxidation Reaction","authors":"Zhenhao Zong, Shengqiang Xue, Jun Wang, Haoming Ma, Lingling Zhou, Wen Liu, Honglei Wang, Changping Yang","doi":"10.1002/cctc.70706","DOIUrl":"10.1002/cctc.70706","url":null,"abstract":"<div>\u0000 \u0000 Regulating electronic structure via a uniform magnetic field effectively optimizes catalytic performance, yet rationally utilizing external magnetic fields to tune catalyst structure, promote small-molecule oxidation, and clarify mechanisms remains a key challenge. Here, a 0.7 T magnetic field was introduced during Fe-Ni2P@NF electrochemical activation to construct a Ni─O─Fe heterogeneous oxygen bridge, boosting urea oxidation (UOR) and hydrogen evolution (HER). In situ Raman revealed the magnetic field-induced Ni─O─Fe formation on 0 T and 0.7 T Fe-Ni2P@NF surfaces—this structure is more stable than NiOOH and functions as an electron transfer channel from Fe to Ni. Infrared spectroscopy revealed synergistic dual-site behavior: Ni sites enhance urea adsorption, while Fe sites in the Ni─O─Fe bridge stabilize *OH species; electron donation from Fe to Ni through the oxygen bridge promotes Ni2+ oxidation to higher-valent states (Ni3+/Ni4+), activating Ni centers for UOR. DFT calculations supported this electronic modulation mechanism—Fe-mediated electron transfer upshifts the Ni d-band center, strengthening urea adsorption and lowering the *NH─O→*N─O rate-determining step barrier. Notably, at 100 mA cm−2, 0.7 T-Fe-Ni2P@NF powers the HER//UOR electrolyze at only 1.54 V, outperforming water electrolyzes (1.62 V).\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 7","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147668113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Cooperatively Halide- and Benzhydryl-Modified Bis(imino)pyridylcobalt Complexes for Linear α-Olefin-Type Polyethylenes 线性α-烯烃型聚乙烯的卤化物和苯甲酸修饰双（亚胺）吡啶基钴配合物

IF 3.9 3区化学

ChemCatChem Pub Date : 2026-04-06 DOI: 10.1002/cctc.70699

Muhammad Ashfaq Ali, Qiuyue Zhang, Qaiser Mahmood, Yizhou Wang, Yanping Ma, Tongling Liang, Wen-Hua Sun

{"title":"Cooperatively Halide- and Benzhydryl-Modified Bis(imino)pyridylcobalt Complexes for Linear α-Olefin-Type Polyethylenes","authors":"Muhammad Ashfaq Ali, Qiuyue Zhang, Qaiser Mahmood, Yizhou Wang, Yanping Ma, Tongling Liang, Wen-Hua Sun","doi":"10.1002/cctc.70699","DOIUrl":"10.1002/cctc.70699","url":null,"abstract":"<div>\u0000 \u0000 This work investigates the influence of electronic properties of cobalt catalysts on key polymerization steps, including monomer insertion rate, chain propagation, and chain termination, which in turn affect catalytic activity, polymer molecular weight, and chain-end structures. Herein, a series of electronically (─Cl and ─F substituents) and sterically (Ph2CH) modified bis(imino)pyridylcobalt complexes, each appended with an N-2-benzhydryl-4-fluoro-6-chlorophenyl group, has been prepared and fully characterized. Upon activation with either MAO or MMAO, all cobalt complexes exhibited high activities in the range of 7.20 × 106–11.78 × 106 g mol−1 h−1 for ethylene polymerization and produced vinyl-terminated linear polyethylenes (CH2═CH(CH2)nCH3: 92%–100%) with molecular weights ranging from 12.9 to 118.0 kg mol−1 and controlled dispersities (in most cases Ð < 2). The peak activity of 11.78 × 106 g mol−1 h−1 at elevated temperature of 80°C, together with polymer molecular weight of 28.1 kg mol−1 and moderately narrow dispersity (Ð = 1.75), places these complexes among the most effective cobalt precatalysts reported to date for ethylene polymerization. Additionally, chain termination occurs predominantly via β-H elimination, resulting in α-olefin-type polyethylenes (almost up to 100%). These polyethylenes with terminal vinyl functionality provide valuable opportunities for post-functionalization of otherwise inert polyethylene backbones.\u0000 </div>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 7","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147668114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

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