ChemPlusChem最新文献_第2页

Controlling Lampenflora in Heritage Sites: In Situ Testing of POM-ILs in the Pommery Champagne Cellar. 文化遗产中兰本植物的控制：在Pommery香槟酒窖中对pom - il的原位测试。

IF 3 4区化学

ChemPlusChem Pub Date : 2025-05-09 DOI: 10.1002/cplu.202500043

Stéphanie Eyssautier-Chuine, Ludovic Besaury, Nathalie Vaillant-Gaveau, Sandra Villaume, Anouk Habrant, Isabel Franco Castillo, Marine Rondeau, Dina Aggad, Maxime Gommeaux, Gilles Fronteau, Scott G Mitchell

{"title":"Controlling Lampenflora in Heritage Sites: In Situ Testing of POM-ILs in the Pommery Champagne Cellar.","authors":"Stéphanie Eyssautier-Chuine, Ludovic Besaury, Nathalie Vaillant-Gaveau, Sandra Villaume, Anouk Habrant, Isabel Franco Castillo, Marine Rondeau, Dina Aggad, Maxime Gommeaux, Gilles Fronteau, Scott G Mitchell","doi":"10.1002/cplu.202500043","DOIUrl":"https://doi.org/10.1002/cplu.202500043","url":null,"abstract":"Artificial lighting, essential for geotouristic purposes in subterranean sites, has facilitated the growth of colored photosynthetic organisms (lampenflora) on two monumental 19th-century bas-reliefs of the Pommery Champagne cellar - a UNESCO-protected heritage site - causing significant aesthetic and physical deterioration. To sustainably preserve these stone artworks, biocidal polyoxometalate-ionic liquids (POM-ILs) were tested alongside the commercial biocide Preventol RI80® on three trial zones, cleaned and colonized areas of a wall, and clean stone samples positioned on a testing station within the cellar. After one year, untreated control areas exhibited growth/regrowth of green biofilms, whereas surfaces treated with POM-ILs or Preventol RI80® remained biofilm-free. Measurements of colorimetry and chlorophyll fluorescence confirmed the effectiveness of both biocides in controlling photosynthetic microorganisms. However, confocal fluorescence microscopy highlighted a reduced long-term inhibition by Preventol RI80® compared to POM-ILs, despite the latter being applied at lower concentrations. Metagenomic analysis validated the performance of POM-ILs, showing a notable decrease in microbial richness and diversity in treated areas. While both products effectively inhibited phototrophs and fungi, their efficacy against Pseudomonadota was limited, due to microbial adaptation via antibiotic resistance genes. This study underscores the potential of POM-ILs as a sustainable alternative for preserving cultural heritage against microbial colonization.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202500043"},"PeriodicalIF":3.0,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143954459","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

Enhanced Interfacial Charge Transfer and Activation for Selective Oxidation of Benzyl Alcohol over Boron-doped Defect-Rich Fe3O4@B-CeO2/Au Photocatalyst. 掺硼富缺陷Fe3O4@B-CeO2/Au光催化剂上增强界面电荷转移和苯甲醇选择性氧化的活化

IF 3 4区化学

ChemPlusChem Pub Date : 2025-05-09 DOI: 10.1002/cplu.202500185

Zhenghui Ma, Yiwen Hu, Mei Liu, Guoli Fan, Yuyang Chen, Xiaoyan Pu, Feng Li

{"title":"Enhanced Interfacial Charge Transfer and Activation for Selective Oxidation of Benzyl Alcohol over Boron-doped Defect-Rich Fe3O4@B-CeO2/Au Photocatalyst.","authors":"Zhenghui Ma, Yiwen Hu, Mei Liu, Guoli Fan, Yuyang Chen, Xiaoyan Pu, Feng Li","doi":"10.1002/cplu.202500185","DOIUrl":"https://doi.org/10.1002/cplu.202500185","url":null,"abstract":"Selective oxidation of aromatic alcohols to their corresponding carbonyl compounds under mild conditions holds significant promise for industrial applications. However, the performance of photocatalysts is notably hindered by limited visible-light absorption, low charge separation and transfer efficiency, as well as weak adsorption and activation of aromatic alcohols and O2. In this study, we successfully synthesized a Boron-doped defect-rich Fe3O4@B-CeO2/Au photocatalyst for the selective oxidation of benzyl alcohol (BA) to benzaldehyde (BAD) under visible light. Experimental results and density functional theory (DFT) calculations demonstrate that boron doping not only introduces a heteroatomic energy level that acts as 'intermediate springboards', significantly broadening the absorption range of visible light, but also creates abundant oxygen vacancies and acidic sites, benefiting the adsorption and activation of O2 and BA. Furthermore, the localized surface plasmon resonance (LSPR) effect of Au further improves the transport of interfacial photogenerated electrons. Due to these combined advantages, the selectivity of the Fe3O4@B-CeO2/Au photocatalyst for BAD reached 100%, and the conversion rate of BA was as high as 98.96% after 8 hours of reaction under visible light. Moreover, owing to the magnetic properties of the Fe3O4 core, the photocatalyst exhibits excellent operational and cyclic stability.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202500185"},"PeriodicalIF":3.0,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143958439","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

UiO-based Mixed Matrix Membranes for Efficient CO2 Separations. 高效CO2分离的uio基混合基质膜。

IF 3 4区化学

ChemPlusChem Pub Date : 2025-05-08 DOI: 10.1002/cplu.202500151

Lamprini G Boutsika, Christos Tampaxis, Kyriaki Papadokostaki, Merope Sanopoulou, Georgia Charalambopoulou, Ioannis Bratsos, Theodore Steriotis

{"title":"UiO-based Mixed Matrix Membranes for Efficient CO2 Separations.","authors":"Lamprini G Boutsika, Christos Tampaxis, Kyriaki Papadokostaki, Merope Sanopoulou, Georgia Charalambopoulou, Ioannis Bratsos, Theodore Steriotis","doi":"10.1002/cplu.202500151","DOIUrl":"https://doi.org/10.1002/cplu.202500151","url":null,"abstract":"Mixed matrix membranes (MMMs) containing UiO-type MOFs have shown excellent potential for CO2 separation processes due to their unique permeability and selectivity properties. However, while the performance of MOF-based MMMs has been widely studied, the effect of structural defects and polymer-filler compatibility are not yet fully understood. In this work, we systematically evaluate the CO2 separation performance of Pebax® MH1657-based MMMs incorporating 5 to 20 wt% of Zr-based MOF, including UiO-66, UiO-67, and two defect-engineered UiO-66 analogues, featuring extended linker (UiO-66_A) or cluster (UiO-66_F) vacancies. The structural, morphological, and thermal properties of the membranes were thoroughly characterised, with emphasis on correlating these features with gas transport performance. Single gas permeation experiments (CO2, CH4, H2) revealed that incorporating UiO nanoparticles within the matrix consistently enhanced CO2 permeability, reaching 145 Barrer for the 20 wt% UiO-66_F MMM, a 216.4% increase over the neat membrane. CO2/CH4 and CO2/H2 selectivities also improved upon increasing MOF loadings, with UiO-66_F achieving values of 25 and 18, respectively. This study provides insights for designing high-performance MMMs for CO2 separation applications, such as biogas upgrading and hydrogen purification.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202500151"},"PeriodicalIF":3.0,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143951646","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

COLORS FROM THE PAST: ION BEAM ANALYSES ON GLASS FINDS EXCAVATED AT THE LATE IRON AGE SETTLEMENT FROM TINOSU, PRAHOVA COUNTY, ROMANIA. 来自过去的颜色：离子束分析在铁器时代晚期从罗马尼亚普拉霍瓦县tinosu的定居点出土的玻璃。

IF 3 4区化学

ChemPlusChem Pub Date : 2025-05-08 DOI: 10.1002/cplu.202500126

Roxana Bugoi, Despina Măgureanu, Mariana-Cristina Popescu, Kristina Isaković, Žiga Šmit

{"title":"COLORS FROM THE PAST: ION BEAM ANALYSES ON GLASS FINDS EXCAVATED AT THE LATE IRON AGE SETTLEMENT FROM TINOSU, PRAHOVA COUNTY, ROMANIA.","authors":"Roxana Bugoi, Despina Măgureanu, Mariana-Cristina Popescu, Kristina Isaković, Žiga Šmit","doi":"10.1002/cplu.202500126","DOIUrl":"https://doi.org/10.1002/cplu.202500126","url":null,"abstract":"This paper discusses the results of Ion Beam Analyses (IBA) on 20 glass items excavated at the Late Iron Age site from Tinosu, Prahova County, Romania, broadly dated to the 2nd c. BC - 2nd c. AD. Most glass fragments originate from naturally colored or intentionally colored tableware, which were either monochrome (green or blue) or polychrome (mosaic millefiori glass of brown or green matrix with red and yellow trails or transparent blue glass matrix splashed with opaque white spots). The typological analysis indicated that some vessels fragments originated from Isings 2, 5, 37, and 81 forms, argument constraining the chronology of the discovery context from the 1st c. BC to the 1st c. AD. A bracelet fragment and a bead were also analyzed. The compositional pattern is typical for the coeval Hellenistic and Roman glass finds; several examples of items manufactured using plant ash were evidenced, too. IBA results, corroborated with archaeological information, indicated that several fragments originate from the same vessel. Chemical analyses supported the underlying archaeological hypothesis that the glass items arrived to the Iron Age settlement from nowadays Tinosu through exchanges between the local populations and the Hellenistic and the Roman world.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202500126"},"PeriodicalIF":3.0,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143954106","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

3,4-Dihydroquinolizinium Ring, the Core Structure of Quinocidin, As a Cysteine-Selective Electrophile. 作为半胱氨酸选择性亲电试剂的喹诺西丁的核心结构3,4-二氢喹啉环。

IF 3 4区化学

ChemPlusChem Pub Date : 2025-05-08 DOI: 10.1002/cplu.202500149

Yu Nakagawa, Yuka Manabe, Wataru Kondo, Tatsuhiko Kondo, Kazuhiro Irie

引用次数: 0

Room Temperature Luminescence from a Biscyclometalated Platinum(II) Complex Bearing Radical as Ancillary Ligand. 以自由基为辅助配体的双环金属化铂（II）配合物的室温发光。

IF 3 4区化学

ChemPlusChem Pub Date : 2025-05-08 DOI: 10.1002/cplu.202500292

Sandhya Verma, Robert Malmberg, Julien Langley, Kausala Mylvaganam, Nicholas Cox, Olivier Blacque, Koushik Venkatesan

{"title":"Room Temperature Luminescence from a Biscyclometalated Platinum(II) Complex Bearing Radical as Ancillary Ligand.","authors":"Sandhya Verma, Robert Malmberg, Julien Langley, Kausala Mylvaganam, Nicholas Cox, Olivier Blacque, Koushik Venkatesan","doi":"10.1002/cplu.202500292","DOIUrl":"https://doi.org/10.1002/cplu.202500292","url":null,"abstract":"Doublet emission from transition metal complexes presents a promising approach to enhance the long-term stability of organic-light emitting diodes (OLEDs) by mitigating triplet-triplet annihilation, a key factor that degrades OLED performance. In this study, a stable persistent radical (Pybtm) was incorporated as an ancillary ligand into a platinum(II) biscyclometalated complex to modulate its emission properties. Photophysical analysis of the newly synthesised and characterised complexes revealed distinct behaviours: doublet emission from the radical complex and phosphorescent emission for the neutral complex, observed both at room temperature in solution and in thin films (doped in poly(methyl methacrylate) (PMMA)) as well as in 2-Me-THF at 77 K. Detailed investigations, supported by DFT and TD-DFT calculations corroborate that the emission properties are strongly dictated by the neutral and the radical ancillary ligand. Additionally, electron paramagnetic resonance spectroscopic studies verified the radical nature of these complexes, highlighting their potential for OLED applications.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202500292"},"PeriodicalIF":3.0,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143959571","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

Corrosion of Steel Strings on Historical Musical Instruments Triggered by the Emissions of Degrading Cellulose Nitrate. 降解的硝酸纤维素排放物引发的古乐器钢弦腐蚀。

IF 3 4区化学

ChemPlusChem Pub Date : 2025-05-07 DOI: 10.1002/cplu.202500099

Vera Milena de Bruyn-Ouboter, Hartmut Kutzke, Shannen Thora Lea Sait, Henrik Friis, Maciej Krzywiecki, Andreas Erbe

{"title":"Corrosion of Steel Strings on Historical Musical Instruments Triggered by the Emissions of Degrading Cellulose Nitrate.","authors":"Vera Milena de Bruyn-Ouboter, Hartmut Kutzke, Shannen Thora Lea Sait, Henrik Friis, Maciej Krzywiecki, Andreas Erbe","doi":"10.1002/cplu.202500099","DOIUrl":"https://doi.org/10.1002/cplu.202500099","url":null,"abstract":"Corrosion is a challenge for the conservation of musical instruments when metal parts are exposed to organic materials of the instrument's body. In long-term observations in the Norwegian Museum of Music, Ringve and Rockheim (Museums of Southern Trøndelag), local contact corrosion was documented on metal strings of plucked instruments when mounted close to cellulose nitrate (CN). The investigated strings were iron-based alloys, in some cases covered with a tin coating. In the gas mixture emitted from CN, the presence of corrosive compounds such as NO2 and carboxylic acids was confirmed by an electrochemical NO2-sensor and gas chromatography-mass spectrometry. The corrosion product on the strings consisted of iron oxide nitrate hydroxide hydrate, Fe2(NO3)O(OH)3(H2O), and goethite, α-FeOOH, detected with X-ray diffraction (XRD), Raman and infrared spectroscopy (IR). X-ray photoelectron spectroscopy (XPS), used to investigate the surface of tin-coated corrosion products, showed the presence of adsorbed organic nitrogen. The formation of corrosion products is dominated by organic acids and moisture. The presence of nitrate in the corrosion product proved the involvement of nitrogen oxides in the corrosion mechanism. This analytical study highlights a dilemma for preserving material combinations in musical instruments and provides a basis for further research for conservation practice.","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202500099"},"PeriodicalIF":3.0,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143951810","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

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":"https://doi.org/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":" ","pages":"e202500130"},"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":"https://doi.org/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, we report a highly efficient and selective catalytic system 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 oC 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":" ","pages":"e202500166"},"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":"https://doi.org/10.1002/cplu.202500053","url":null,"abstract":"A comprehensive approach was 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 was 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 were examined. Posnjakite (Cu₄SO4(OH)₆·H2O) and malachite (Cu2(CO3)(OH)2) were most frequently detected by X-ray powder micro-diffraction. In rock samples from the mine site, brochantite (Cu₄SO4(OH)₆) and malachite were dominant, and in recent precipitates only langite (Cu₄SO4(OH)₆·2H2O) was detected, which remained in contact with the leaking water. In the laboratory, the pigment was prepared by gradual 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 was 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":" ","pages":"e202500053"},"PeriodicalIF":3.0,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","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":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0