ChemPlusChem最新文献_第10页

Integrated Chemical Mapping and Analytical Pyrolysis for Tracking the Evolution of Street Art Material 追踪街头艺术材料演变的综合化学制图与分析热解。

IF 3 4区化学

ChemPlusChem Pub Date : 2025-05-05 DOI: 10.1002/cplu.202500130

Jacopo La Nasa, Silvia Pizzimenti, Tommaso Nacci, Chloë Coustet, Giulia Lorenzetti, Stefano Legnaioli, Andrea Surak, Ben Ruchte, Julia Quilici, Mathieu Thoury, Ilaria Degano, Francesca Modugno

{"title":"Integrated Chemical Mapping and Analytical Pyrolysis for Tracking the Evolution of Street Art Material","authors":"Jacopo La Nasa, Silvia Pizzimenti, Tommaso Nacci, Chloë Coustet, Giulia Lorenzetti, Stefano Legnaioli, Andrea Surak, Ben Ruchte, Julia Quilici, Mathieu Thoury, Ilaria Degano, Francesca Modugno","doi":"10.1002/cplu.202500130","DOIUrl":"10.1002/cplu.202500130","url":null,"abstract":"The chemical investigation of modern art materials and synthetic paint materials has been a major focus of research in cultural heritage science over the past decade. Since the 1970s, street art has become an influential cultural movement with significant artistic and social impact in modern cities, and the conservation of relevant artworks related to urban neo-muralism has been increasingly recognized. Understanding these materials is critical to developing conservation strategies, as their composition continues to change with industrial innovation and regulatory changes. This study presents the application of an analytical approach that integrates chemical mapping based on spectroscopic approaches together with analytical pyrolysis, chromatography, and mass spectrometry to investigate two key case studies and provide insights into the evolution of street art materials over the past 30 years. This comprehensive approach provides a deeper understanding of the composition and transformation of urban art materials over time, overcoming the limitations of individual methods and revealing both organic and inorganic materials. This combined approach represents the state of the art in the study of synthetic paints used in modern art and provides new insights into the evolution of the formulation of materials used by street artists.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":"90 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143955235","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

Neutral Aerobic Oxidation of Alkyl Aromatics via Synergistic CoIII/NHPI Catalysis 协同Co /NHPI催化烷基芳烃的中性好氧氧化研究

IF 3 4区化学

ChemPlusChem Pub Date : 2025-05-05 DOI: 10.1002/cplu.202500166

Qian-Xia Zhang, Qing-Wen Song, Kan Zhang, Ping Liu

{"title":"Neutral Aerobic Oxidation of Alkyl Aromatics via Synergistic CoIII/NHPI Catalysis","authors":"Qian-Xia Zhang, Qing-Wen Song, Kan Zhang, Ping Liu","doi":"10.1002/cplu.202500166","DOIUrl":"10.1002/cplu.202500166","url":null,"abstract":"The direct liquid-phase oxidative C─H functionalization of hydrocarbons using molecular oxygen represents an attractive sustainable approach for ketone synthesis, offering advantages in atom economy and environmental compatibility. However, existing catalytic systems often require harsh conditions or suffer from overoxidation issues, limiting their practical applicability. Herein, a highly efficient and selective catalytic system is reported for benzylic C─H oxidation of alkyl aromatics under exceptionally mild conditions, employing a synergistic combination of trivalent cobalt acetylacetonate [Co(acac)3] and N-hydroxyphthalimide (NHPI) in neutral media. This catalytic protocol achieves outstanding ketone yields up to 99% with >99% selectivity at 70 °C under atmospheric oxygen pressure. The system demonstrates remarkable substrate scope tolerance, accommodating various functional groups while maintaining excellent efficiency (up to 99% conversion and selectivity). Notably, the methodology has been successfully scaled to multigram production of acetophenone without compromising yield and selectivity. Comprehensive mechanistic studies, including 18O2 isotopic labeling experiment, unequivocally establish a two-step reaction pathway proceeding through a 1-phenylethanol intermediate. This work provides significant advances in sustainable oxidation catalysis by combining operational simplicity with exceptional selectivity under mild conditions, offering promising potential for industrial implementation.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":"90 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144053381","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

“Hungarian Mine Green”, a Semi-Natural Copper Pigment from Banská Bystrica Region (Slovakia) - Analytical Evidence and Laboratory Replication “匈牙利矿绿”，一种来自斯洛伐克班斯克<e:1>比斯特里察地区的半天然铜颜料-分析证据和实验室复制。

IF 3 4区化学

ChemPlusChem Pub Date : 2025-05-05 DOI: 10.1002/cplu.202500053

Markéta Žůrková, David Hradil, Janka Hradilová, Petr Bezdička, Silvie Švarcová

{"title":"“Hungarian Mine Green”, a Semi-Natural Copper Pigment from Banská Bystrica Region (Slovakia) - Analytical Evidence and Laboratory Replication","authors":"Markéta Žůrková, David Hradil, Janka Hradilová, Petr Bezdička, Silvie Švarcová","doi":"10.1002/cplu.202500053","DOIUrl":"10.1002/cplu.202500053","url":null,"abstract":"A comprehensive approach is taken to investigate the “Hungarian mine green” pigment, including a historical overview, analysis of the pigment on artworks, and its laboratory replication. It is known that in the past, the pigment is collected in wooden reservoirs in which copper (Cu) compounds precipitated from drainage water during copper mining at Špania Dolina–Piesky and Ľubietová deposits, Slovakia. Microsamples of four polychrome wooden sculptures from the 16th-17th centuries are examined. Posnjakite (Cu4SO4(OH)6·H2O) and malachite (Cu2(CO3)(OH)2) are most frequently detected by X-ray powder microdiffraction. In rock samples from the mine site, brochantite (Cu4SO4(OH)6) and malachite are dominant, and in recent precipitates, only langite (Cu4SO4(OH)6·2H2O) is detected, remained in contact with leaking water. In the laboratory, the pigment is prepared by gradually enriching the starting CuSO4·5H2O solution with NaHCO3 in two series of experiments. The initial concentration of the reactants reflected the ratio of Cu2+: HCO3− = 1:1 found in the mine waters at the site, from which langite crystallizes. However, langite does not formed, while brochantite gradually transformed into posnjakite and subsequently malachite. The co-occurrence of basic copper sulfates and carbonates and the characteristic grain morphology proved to be the main indicators of the pigment in artworks.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":"90 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cplu.202500053","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143953136","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

pH-Responsive Self-Assembly of a Thiazole-Modified Peptide Nucleic Acid with Silver Ions 噻唑修饰银离子PNA的ph响应性自组装。

IF 3 4区化学

ChemPlusChem Pub Date : 2025-05-05 DOI: 10.1002/cplu.202400451

Ananta Gorai, Titas Kumar Mukhopadhyay, Ayan Datta, Jyotirmayee Dash

引用次数: 0

Choline Chloride Versus Choline Acetate: Anion Influence on Plasticizing Action in Starch/Chitosan Blends 氯化胆碱与醋酸胆碱：阴离子对淀粉/壳聚糖共混物塑化作用的影响。

IF 3 4区化学

ChemPlusChem Pub Date : 2025-04-29 DOI: 10.1002/cplu.202500072

Susanna Romano, Serena De Santis, Chiara Frezza, Benedetta Malvagna, Daniele Rocco, Giovanni Sotgiu, Monica Orsini

{"title":"Choline Chloride Versus Choline Acetate: Anion Influence on Plasticizing Action in Starch/Chitosan Blends","authors":"Susanna Romano, Serena De Santis, Chiara Frezza, Benedetta Malvagna, Daniele Rocco, Giovanni Sotgiu, Monica Orsini","doi":"10.1002/cplu.202500072","DOIUrl":"10.1002/cplu.202500072","url":null,"abstract":"Biopolymers have gained importance in various sectors such as biomedical, automotive, and agriculture, as well as in single-use food packaging. However, to make them competitive with traditional plastics, biopolymers require certain modifications, including the addition of plasticizers and/or blending with other macromolecules. This study aims to develop biodegradable films using starch blended with chitosan, plasticized by choline chloride [Ch][Cl], and choline acetate [Ch][OAc], an ionic liquid derived from choline. The decision to exploit the plasticizer ability of bio-based ionic compounds depends on their excellent properties, such as non-volatility, biodegradability, and low toxicity. The research evaluates the effects of varying starch and chitosan fractions, as well as the two plasticizers, on the properties of the resulting films. Morphology, chemical composition, crystallinity, mechanical properties, thermal stability, and wettability are evaluated through different techniques, such as scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction analysis, thermogravimetric analysis, and performing mechanical and wettability tests. Characterization analyses highlight the primary influence of the anion on the properties of the different blends, suggesting the greater plasticizer capacity of the acetate anion.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":"90 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143956946","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

Twinned Orthogonal Adjustable Tomograph Device in Conservation Services: Case Studies of a Recent X-ray Investigation into Baroque Oil Paintings 双正交可调层析成像仪在保护服务：最近对巴洛克油画的x射线调查的案例研究。

IF 3 4区化学

ChemPlusChem Pub Date : 2025-04-28 DOI: 10.1002/cplu.202500063

Michal Vopálenský, Luboš Machačko

引用次数: 0

A Sequential Catalytic Carbonation–Hydrolysis–Diol Dehydrogenation Reaction of Epoxides 环氧化合物碳化-水解-二醇脱氢顺序催化反应。

IF 3 4区化学

ChemPlusChem Pub Date : 2025-04-27 DOI: 10.1002/cplu.202500203

Alejandro Lumbreras-Teijeiro, Judit Oliver-Meseguer, Antonio Leyva-Pérez

{"title":"A Sequential Catalytic Carbonation–Hydrolysis–Diol Dehydrogenation Reaction of Epoxides","authors":"Alejandro Lumbreras-Teijeiro, Judit Oliver-Meseguer, Antonio Leyva-Pérez","doi":"10.1002/cplu.202500203","DOIUrl":"10.1002/cplu.202500203","url":null,"abstract":"The design of cascade reactions in synthetic programs is of interest, particularly if the individual steps involve catalyzed reactions, and simple and highly available molecules such as carbon dioxide (CO2), water (H2O), and dihydrogen (H2) are employed. Herein, a three-step sequential reaction is shown from epoxides to dehydrogenated diols, catalyzed by a combination of commercially available ionic liquids and supported Pt species on charcoal (Pt/C) in low amounts (<0.05 mol%). The process involves first carbonation of epoxides with CO2, followed by the opening of the carbonate with H2O, and then an acceptor-less dehydrogenation reaction of the resulting diol to release H2. The inclusion of this last step in the one-pot synthesis of diols from epoxides is, to the knowledge, unprecedented. Reactive and kinetic experiments for each individual step reveal the key role of CO2 to avoid epoxide polymerizations and enable the synthesis of a clean diol for the final dehydrogenation reaction.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":"90 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cplu.202500203","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143954455","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

A Molecular-Level Exploration of Dopant-Free Pyrazine-Derived Hole Transport Materials: Investigation of Interfacial Interaction in Perovskite Photovoltaics. 无掺杂吡嗪衍生空穴传输材料的分子水平探索：钙钛矿光伏电池中界面相互作用的研究。

IF 3 4区化学

ChemPlusChem Pub Date : 2025-04-27 DOI: 10.1002/cplu.202500124

Archana Sheshachala, Kavya S Keremane, Vighneshwar Ganesh Bhat, Subramanya Karunakar Shankar, Ivy M Asuo, Nutifafa Yao Doumon, Bed Poudel, Udaya Kumar Dalimba

{"title":"A Molecular-Level Exploration of Dopant-Free Pyrazine-Derived Hole Transport Materials: Investigation of Interfacial Interaction in Perovskite Photovoltaics.","authors":"Archana Sheshachala, Kavya S Keremane, Vighneshwar Ganesh Bhat, Subramanya Karunakar Shankar, Ivy M Asuo, Nutifafa Yao Doumon, Bed Poudel, Udaya Kumar Dalimba","doi":"10.1002/cplu.202500124","DOIUrl":"10.1002/cplu.202500124","url":null,"abstract":"The development of innovative core structures and peripheral groups for organic hole-transporting materials (HTMs) continues to be a focal point in enhancing the performance of perovskite solar cells (PVSCs). This study reports the design and synthesis of dopant-free pyrazine-based HTMs. PS1 features a D-A-D type structure with pyrazine as the acceptor and 4,4'-dimethoxy triphenylamine (4,4'-OMe-TPA) as the donor, while PS2 adopts a D-π-A-π-D configuration with an additional thiophene unit as π-spacer along with 4,4'-OMe-TPA as donor. Both compounds are synthesized through a simple two-step synthetic procedure. These HTMs are subjected to structural, photophysical, electrochemical, theoretical, and photoelectrochemical studies with an emphasis on evaluation of structure-property relationships. Theoretical studies are conducted to explore the electronic distribution, optimized molecular structure, and frontier molecular orbitals. Their performance in PVSCs is systematically evaluated without adding dopants. PS2 exhibits superior photoluminescence quenching compared to PS1, indicating more efficient charge transfer from the perovskite layer. Notably, PS2 achieves a power conversion efficiency (PCE) of 11.9%, surpassing the performance of PS1 (PCE of 10.15%). These findings highlight the potential of adjusting the electron-deficient core and π-bridge units as an effective strategy to optimize the properties of HTMs and improve their performance in PVSC applications.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e2500124"},"PeriodicalIF":3.0,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143953847","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

Molecular NiII Complexes as Bifunctional Electrocatalysts for O2 Evolution and Urea Electro-Oxidation Reaction 分子NiII配合物作为氧析出和尿素电氧化反应的双功能电催化剂。

IF 3 4区化学

ChemPlusChem Pub Date : 2025-04-26 DOI: 10.1002/cplu.202500054

Niteesh Kumar, Lalita Wagh, Sajid Mehmood, Apurba K. Das, Tanmay Kumar Ghorai

{"title":"Molecular NiII Complexes as Bifunctional Electrocatalysts for O2 Evolution and Urea Electro-Oxidation Reaction","authors":"Niteesh Kumar, Lalita Wagh, Sajid Mehmood, Apurba K. Das, Tanmay Kumar Ghorai","doi":"10.1002/cplu.202500054","DOIUrl":"10.1002/cplu.202500054","url":null,"abstract":"Developing resilient and robust electrocatalysts devoid of noble metals is vital for facilitating the generation of O2/H2 from water electrolysis, particularly in catalyzing oxygen evolution reaction (OER) and urea oxidation reaction (UOR), respectively. Nickel-based catalysts have attracted as part of global efforts to produce hydrogen from urea-rich wastewater due to their high reaction rates and favorable long-term stability. Two new mononuclear NiII-embedded complexes, namely, [C26H38NiN4O4] (Complex 1) and [C24H32NiF2N4O2] (Complex 2), are explored as a bifunctional catalyst for the OER and UOR herein. Complexes 1 and 2 crystallize in triclinic and monoclinic with space group <math></math>1 (2) & P 21/c (14), respectively. The OER outcomes of Complex 1 exhibit excellent performance, featuring a lower overpotential of 220 mV and reduced Tafel slope value of 82 mV dec−1 at a benchmarking current density of 10 mA cm−2 in 1 M KOH compared to Complex 2. Additionally, the results of UOR indicate that Complex 1 only requires 1.30 V potential to achieve the same current density which is significantly lower than other counterparts and most reported materials. Chronopotentiometry analysis reveals that Complex 1 is stable up to a longer period of 100 and 20 h in 1 M KOH and alkaline urea electrolyte, respectively.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":"90 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143956942","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

Water Evaporation-Induced Electricity Generation: Mechanisms, Optimization Strategies, and Future Prospects 水蒸发诱导发电：机制、优化策略和未来展望。

IF 3 4区化学

ChemPlusChem Pub Date : 2025-04-26 DOI: 10.1002/cplu.202500133

Feng Du, Cancan Zhang, Shuying Dong, Shu Wang, Quan Li

引用次数: 0