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Front Cover: Heterogeneous Asymmetric Hydrogenation of C═C and C═O Double Bonds (ChemCatChem 4/2025)

IF 3.8 3区化学

ChemCatChem Pub Date : 2025-02-18 DOI: 10.1002/cctc.202580401

Dr. Ana Franco, Prof. Dr. Eszter Baráth

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Front Cover: Visible-Light-Induced Desulfurative Coupling of Alkyl Benzothiazolyl Sulfides with Electron-Deficient Alkenes/Alkynes: Dual Role of Base-Activated Hantzsch Esters (ChemCatChem 3/2025)

IF 3.8 3区化学

ChemCatChem Pub Date : 2025-02-06 DOI: 10.1002/cctc.202580301

Dr. Tetsuya Sengoku, Koki Matsune, Takuma Shimotori, Nagisa Kikuchi, Haruto Hijikata, Shun Nishioka, Reo Takahashi

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Correction to “Laccase-Copper Nanohybrids as Highly Active Catalysts for Bio-degradation”

IF 3.8 3区化学

ChemCatChem Pub Date : 2025-02-06 DOI: 10.1002/cctc.202500090

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Correction to “Durable Electrooxidation of Acidic Water Catalysed by a Cobalt-Bismuth-based Oxide Composite: An Unexpected Role of the F-doped SnO2 Substrate”

IF 3.8 3区化学

ChemCatChem Pub Date : 2025-02-04 DOI: 10.1002/cctc.202500120

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Unveiling the Role of Rhenium Precursors in Supercritical CO₂ Hydrogenation: A Comparative Study of ReOx/TiO₂ Catalysts

IF 3.8 3区化学

ChemCatChem Pub Date : 2025-02-03 DOI: 10.1002/cctc.202401874

Felipe Machado, Maitê L. Gothe, Lais R. Borges, Marcelo C. Portes, Orlando Rodrigues, Rômulo A. Ando, Liane M. Rossi, Pedro Vidinha

{"title":"Unveiling the Role of Rhenium Precursors in Supercritical CO₂ Hydrogenation: A Comparative Study of ReOx/TiO₂ Catalysts","authors":"Felipe Machado, Maitê L. Gothe, Lais R. Borges, Marcelo C. Portes, Orlando Rodrigues, Rômulo A. Ando, Liane M. Rossi, Pedro Vidinha","doi":"10.1002/cctc.202401874","DOIUrl":"https://doi.org/10.1002/cctc.202401874","url":null,"abstract":"Heterogeneous rhenium catalysts supported on various oxides, particularly TiO2, have demonstrated effectiveness in converting carbon dioxide (CO2) to methanol via hydrogenation, showing high selectivity under diverse reaction conditions. However, the impact of different rhenium precursors on the catalytic performance and physicochemical properties of ReOx/TiO2 has not yet been elucidated. Herein, we compared catalysts prepared from NH4ReO4 and Re2O7 precursors with varying rhenium content (4–14 wt% Re) synthesized using a wet impregnation approach. These catalysts were evaluated under different reaction temperatures (200–250 °C), pressures (100–200 bar), and H2/CO2 ratios (1–4). This study revealed that both catalytic performance and physicochemical properties varied not only with the type of precursor but also with the rhenium content. Variation in reduction temperature, particle size, oxidation states of Re and surface Re═O terminals were observed. In batch system, catalysts derived from NH4ReO4 demonstrated a higher selectivity for methanol production under high pressure and stoichiometric conditions, regardless of temperature. In contrast, Re₂O₇-based catalysts demonstrated higher methanol selectivity at 200 °C, with H₂/CO₂ ratios between 1 and 3, regardless of the total pressure. These findings provide a deeper and valuable insight on the choice of precursors for the preparation of ReOx/TiO2 catalysts for CO2 hydrogenation.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 6","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632658","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}

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Unveiling the Catalytic Activity of Nickel(II) Complexes of Pentadentate Ligands in Aromatic Oxidations 揭示五价配体镍（II）配合物在芳香族氧化中的催化活性

IF 3.8 3区化学

ChemCatChem Pub Date : 2025-01-26 DOI: 10.1002/cctc.202401645

Anjana Rajeev, Sethuraman Muthuramalingam, Visvesvarar Pitchai Murugan, Miquel Costas, Prabha Vadivelu, Muniyandi Sankaralingam

{"title":"Unveiling the Catalytic Activity of Nickel(II) Complexes of Pentadentate Ligands in Aromatic Oxidations","authors":"Anjana Rajeev, Sethuraman Muthuramalingam, Visvesvarar Pitchai Murugan, Miquel Costas, Prabha Vadivelu, Muniyandi Sankaralingam","doi":"10.1002/cctc.202401645","DOIUrl":"https://doi.org/10.1002/cctc.202401645","url":null,"abstract":"Selective oxidation of aromatic substrates to phenols is a challenging goal in synthetic chemistry. Herein, we investigate the catalytic activity of nickel(II) complexes of the type [Ni(L)(CH3CN)](X)2 (1–4); (X = ClO4−, BPh4−, L = N4Py, BnTPEN, and BnImDPEN) supported by pentadentate ligands in the hydroxylation of aromatic substrates to corresponding phenols using H2O2. In benzene oxidation, complex 2 showed a phenol yield of 28% and a turnover number of 560 with 99% selectivity. Also, preferential oxidation of aromatic C─H bonds over aliphatic C─H bonds was noted during the oxidation of substituted benzenes. The kinetic isotope effect value (1.01) supported the involvement of nickel-bound oxygen species in the catalytic cycle rather than hydroxyl radicals. The key source of oxygen in the formed phenol was found to be H2O2 based on the isotope-labelling experiments using H218O2 and H218O. Although the formation of {[(BnTPEN)Ni(OOH)]+ + NCCH3}+ intermediate was identified upon reacting complex 2 with H2O2, this species did not directly react with benzene to form phenol. Further, DFT studies suggested that the species [(L)NiII(O•)]+ derived from O─O homolysis of nickel(II) hydroperoxo intermediate reacts with benzene to produce phenol and the presence of a nickel-based oxidant is the reason behind the excellent selectivity.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 6","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632801","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}

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Mechanoredox-Catalyzed Organic Synthesis with Piezoelectric Materials: Quo Vadis?

IF 3.8 3区化学

ChemCatChem Pub Date : 2025-01-24 DOI: 10.1002/cctc.202401814

Dr. Hanggara Sudrajat, Prof. Dr. Hsien-Yi Hsu, Prof. Dr. François Jérôme, Prof. Dr. Juan Carlos Colmenares

{"title":"Mechanoredox-Catalyzed Organic Synthesis with Piezoelectric Materials: Quo Vadis?","authors":"Dr. Hanggara Sudrajat, Prof. Dr. Hsien-Yi Hsu, Prof. Dr. François Jérôme, Prof. Dr. Juan Carlos Colmenares","doi":"10.1002/cctc.202401814","DOIUrl":"https://doi.org/10.1002/cctc.202401814","url":null,"abstract":"Piezoelectric materials offer great promise due to their ability to generate electric fields under mechanical stress, producing surface charges that drive otherwise kinetically sluggish redox reactions. The strained surfaces of these materials provide a unique advantage in controlling product selectivity and enabling reaction pathways that are unattainable with conventional methods. This perspective highlights advancements, challenges, and the future potential of piezoelectric materials in synthetic organic chemistry, with a focus on designing materials optimized for piezocatalyzed organic synthesis. Piezocatalysis is industrially relevant because of its operational simplicity, enabling mild, gram scale synthesis with reusable catalysts, minimal solvent use, and air tolerant conditions. It involves redox cycles that facilitate one electron redox events without requiring light exposure or electrical bias. Despite significant progress, many fundamental aspects are yet to be fully understood. One example is the correlation between piezoelectricity and catalytic activity, which is not always linear, as demonstrated by the comparison between tetragonal and cubic BaTiO₃. While cubic BaTiO₃ is not piezoelectric, it shows excellent catalytic activity in certain redox reactions such as arylation, dicarbonylation, and cyclization under mechanochemical conditions comparable to that of piezoelectric tetragonal BaTiO₃. Considering all these aspects, this perspective aims to stimulate discussion to advance this promising field in the right direction.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 6","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143633026","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}

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Cover Feature: Multivalent Amine Functionalized Carbon Dots Catalyze Efficient Denitrosylation (ChemCatChem 2/2025)

IF 3.8 3区化学

ChemCatChem Pub Date : 2025-01-22 DOI: 10.1002/cctc.202580202

Manju Solra, Sourav Das, Suman Nayak, Abhay Srivastava, Rohit Kapila, Smarak I. Chaudhury, Dr. Subinoy Rana

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Enhanced Electrocatalytic Oxidation of 5-Hydroxymethylfurfural to 2,5-Furandicarboxylic Acid via N-Hydroxyphthalimide-Integrated Porphyrin(Co) Covalent Organic Frameworks

IF 3.8 3区化学

ChemCatChem Pub Date : 2025-01-22 DOI: 10.1002/cctc.202401674

Ying Yin, Lei Fang, Guocai Wu, Hui Xu, Prof. Liangchun Li

{"title":"Enhanced Electrocatalytic Oxidation of 5-Hydroxymethylfurfural to 2,5-Furandicarboxylic Acid via N-Hydroxyphthalimide-Integrated Porphyrin(Co) Covalent Organic Frameworks","authors":"Ying Yin, Lei Fang, Guocai Wu, Hui Xu, Prof. Liangchun Li","doi":"10.1002/cctc.202401674","DOIUrl":"https://doi.org/10.1002/cctc.202401674","url":null,"abstract":"The depletion of fossil fuel reserves, coupled with the mounting environmental concerns, highlights the urgent need to develop sustainable methods for chemical synthesis from renewable resources. One promising avenue is the electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA), utilizing non-precious metal catalysts. Herein, we designed and synthesized covalent organic frameworks (COFs) as electrocatalysts, engineered through the integration of N-hydroxyphthalimide (NHPI) linkers with porphyrin building blocks. Electrochemical studies revealed that the Co-Por-COF-NHPI with metallic porphyrin(Co) surpassed the nonmetallic Por-COF-NHPI in conversion, selectivity, and recyclable stability by virtue of the lower onset potentials, higher current densities, and diminished charge transfer resistance. The Co-Por-COF-NHPI achieved remarkable HMF conversion of 95.5% and selectivity to FDCA of 95.6%, attributable to the synergistic effect of porphyrin(Co) and oxidative organocatalytic NHPI sites. Continuous cycling tests further verified its outstanding stability and durability, underscoring the potential of Co-Por-COF-NHPI as an efficient and sustainable catalyst for biomass conversion.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 6","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632985","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}

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Front Cover: Silica-Mediated Incorporation of Lipase into the Bulk of a Deep Eutectic Solvent: An Efficient Biocatalytic Phase for Esters Synthesis (ChemCatChem 2/2025)

IF 3.8 3区化学

ChemCatChem Pub Date : 2025-01-22 DOI: 10.1002/cctc.202580201

Anna Wolny, Agata Babiuch, Dr. Piotr Latos, Dr. Sebastian Jurczyk, Prof. Dr. Anna Chrobok

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