The Royal Society of Chemistry最新文献_第5页

Photocatalytic carboxylation of aryl halides/alkenes with a copper(I) complex bypassing the demand for dual catalysts. 用铜(I)配合物光催化芳基卤化物/烯烃羧基化，绕过双催化剂的需要。

IF 4.2 2区化学

Chemical Communications Pub Date : 2025-10-16 DOI: 10.1039/d5cc04943a

A John David, Logeshwari Seethapathy, S Vijay Kumar, Rajorshi Das, Anjan Das

引用次数: 0

Development of a micro-solid phase extraction procedure using a histidine-copper adsorbent for the extraction of Zn(II) and Cd(II) ions from tea samples. 用组氨酸-铜吸附剂提取茶叶样品中锌（II）和镉（II）离子的微固相萃取方法的研究。

IF 2.6 3区化学

Analytical Methods Pub Date : 2025-10-16 DOI: 10.1039/d5ay01092f

Atefeh Bakhshi, Saeed Mohammad Sorouraddin, Mohammad Reza Afshar Mogaddam, Mir Ali Farajzadeh

{"title":"Development of a micro-solid phase extraction procedure using a histidine-copper adsorbent for the extraction of Zn(II) and Cd(II) ions from tea samples.","authors":"Atefeh Bakhshi, Saeed Mohammad Sorouraddin, Mohammad Reza Afshar Mogaddam, Mir Ali Farajzadeh","doi":"10.1039/d5ay01092f","DOIUrl":"https://doi.org/10.1039/d5ay01092f","url":null,"abstract":"In this study, a micro-solid phase extraction method was developed using a sorbent synthesized from histidine and copper nitrate for the extraction of Zn(II) and Cd(II) ions from tea samples. The extraction system consisted of a syringe cylinder with a compressed cotton layer as a filter, onto which a few milligrams of the sorbent were layered. The extract of the tea sample was passed through the sorbent and elution was performed using methanol. The extracted analytes were quantified by flame atomic absorption spectrometry. The effect of critical parameters such as sorbent amount, pH, eluate type and volume, salt, and flow rate on extraction efficiency was studied and optimized. Under optimal conditions, the method demonstrated linear ranges of 2-100 and 1-100 μg Kg-1 with detection limits of 0.7 and 0.4 μg Kg-1 for Cd(II) and Zn(II) ions, respectively. The intra- and inter-day relative standard deviations were ≤5% for repeated measurements, indicating good repeatability. This method was efficient without requiring vortexing or centrifuging steps, simplifying the procedure. Finally, by determining the concentrations of Zn(II) and Cd(II) ions in tea samples, the feasibility of the method was confirmed with relative recoveries between 94.5 and 100.8%.","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145306345","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

WTSynNet: a lightweight cooperative network for multi-species Raman spectral classification. WTSynNet：用于多物种拉曼光谱分类的轻量级协同网络。

IF 2.6 3区化学

Analytical Methods Pub Date : 2025-10-16 DOI: 10.1039/d5ay01163a

Zhishun Huang, Ri-Gui Zhou, Pengju Ren

{"title":"WTSynNet: a lightweight cooperative network for multi-species Raman spectral classification.","authors":"Zhishun Huang, Ri-Gui Zhou, Pengju Ren","doi":"10.1039/d5ay01163a","DOIUrl":"10.1039/d5ay01163a","url":null,"abstract":"Animal blood and semen contain diverse biochemical constituents that are of great importance in forensic science, veterinary diagnostics, and species traceability. Raman spectroscopy has emerged as a powerful tool for body fluid identification owing to its non-destructive and rapid acquisition of molecular vibrational fingerprints. However, achieving a balance between discriminative feature extraction and computational efficiency remains a challenge, particularly in imbalanced multiclass scenarios. To address this issue, we propose WTSynNet, a lightweight framework that integrates a one-dimensional wavelet convolution module (WTConv1d) with a star operation mechanism to enable efficient multiscale feature learning. Experiments on animal blood and semen Raman spectral datasets demonstrate that WTSynNet attains over 98% classification accuracy with fewer than 0.3 M parameters, while maintaining extremely low inference latency and memory usage. Moreover, the model achieves strong performance on a cross-domain marine pathogen Raman dataset, underscoring its robustness and adaptability. These results indicate that WTSynNet is a compact yet powerful model with strong generalization capability and holds broad potential for future applications in rapid on-site Raman spectral analysis.","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" ","pages":"8127-8141"},"PeriodicalIF":2.6,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197527","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

A first run-of-river hydropower plant development in a permafrost-rich subarctic Canadian region: short-term fate of mercury and carbon. 在加拿大永久冻土丰富的亚北极地区开发的第一座河流水电站：汞和碳的短期命运。

IF 3.9 3区环境科学与生态学

Environmental Science: Processes & Impacts Pub Date : 2025-10-16 DOI: 10.1039/d5em00171d

Mariane St-Aubin, Jean-François Lapierre, Dominic E Ponton, Michel Sliger, Jeanne Gaudreault, Éric Atagotaaluk, Daniel Fortier, Marc Amyot

{"title":"A first run-of-river hydropower plant development in a permafrost-rich subarctic Canadian region: short-term fate of mercury and carbon.","authors":"Mariane St-Aubin, Jean-François Lapierre, Dominic E Ponton, Michel Sliger, Jeanne Gaudreault, Éric Atagotaaluk, Daniel Fortier, Marc Amyot","doi":"10.1039/d5em00171d","DOIUrl":"https://doi.org/10.1039/d5em00171d","url":null,"abstract":"A first run-of-river power plant built in Nunavik (QC, Canada) lies in a continuous permafrost zone, a substantial carbon (C) rich mercury (Hg) reservoir. Its impoundment could promote permafrost thaw and remobilize Hg and lead to the enhanced production of highly toxic methylmercury (MeHg). To elucidate how RORs can influence C and Hg dynamics and transformations in a subarctic landscape, soils, water and benthic invertebrates were sampled shortly before and after the flooding. Soil Hg concentrations were higher in the organic active layer than in frozen ground. Three months after river impoundment, MeHg concentrations and proportions in the surface organic layer of flooded soils were seven and four times higher, respectively. A similar increase was observed in surface waters of the newly created bay, where MeHg concentration and proportion were, respectively, ∼10 and four times higher. Biological MeHg concentrations increased in low trophic level organisms associated with this flooded environment, namely primary consumers (∼4×) and omnivores (∼3×). However, these rises were limited to the small (<1 km2) newly created bay, highlighting spatial heterogeneity in the production and trophic transfer of MeHg at the river scale in response to recent impoundment.","PeriodicalId":74,"journal":{"name":"Environmental Science: Processes & Impacts","volume":" ","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145306521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel class of oligoarylamide antibiotics defined by albicidins and cystobactamids. 一类新型的低聚芳基酰胺类抗生素，由白杆菌素和囊杆菌素定义。

IF 10.6 1区化学

Natural Product Reports Pub Date : 2025-10-15 DOI: 10.1039/d5np00053j

Marcel Kulike-Koczula, Dominik Heimann, Tobias Eulberg, Daniel Kohnhäuser, Roderich D Süssmuth, Mark Brönstrup

引用次数: 0

Computational insights into the corrosion behavior of NbTaMoW and NbTaMoWV high-entropy alloys in molten fluoride salts. NbTaMoW和NbTaMoWV高熵合金在熔氟盐中的腐蚀行为的计算见解。

IF 3.1 3区化学

Faraday Discussions Pub Date : 2025-10-15 DOI: 10.1039/d5fd00102a

Agnes Britte Katai, Arjun Varma Ramasimha Varma, Conrard Giresse Tetsassi Feugmo

{"title":"Computational insights into the corrosion behavior of NbTaMoW and NbTaMoWV high-entropy alloys in molten fluoride salts.","authors":"Agnes Britte Katai, Arjun Varma Ramasimha Varma, Conrard Giresse Tetsassi Feugmo","doi":"10.1039/d5fd00102a","DOIUrl":"https://doi.org/10.1039/d5fd00102a","url":null,"abstract":"Molten salt reactors (MSRs) expose structural materials to harsh conditions, such as elevated temperatures, corrosive fluoride salts, and substantial neutron irradiation. These factors contribute to intricate degradation processes, including radiation-induced defect development, void swelling, and corrosion. Refractory high-entropy alloys with a body-centered cubic structure provide noteworthy thermal stability and mechanical strength, making them excellent candidates for MSR application. This study explores the corrosion properties of NbTaMoW and NbTaMoWV in FLiBe molten salt via density functional theory and ab initio molecular dynamics simulations. Analyses of electronic structure, including density of states and crystal orbital Hamilton population, shed light on interfacial bonding and charge distribution. NbTaMoW shows minimal d-band shifts and weak fluorine interaction, indicating enhanced oxidation resistance. Adding vanadium to form NbTaMoWV further diminishes oxidative vulnerability and stabilizes the electronic structure at the salt interface, suggesting superior corrosion resistance in molten salt conditions.","PeriodicalId":76,"journal":{"name":"Faraday Discussions","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145290331","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

Co(III)-catalyzed allylation reaction of 2-alkenylpyridines with 2-vinylaziridines: access to 1,4-dienes. Co（III）催化2-烯基吡啶与2-乙烯基氮基吡啶的烯丙基化反应：得到1,4-二烯。

IF 2.7 3区化学

Organic & Biomolecular Chemistry Pub Date : 2025-10-15 DOI: 10.1039/d5ob01343g

Hong Zeng, Zhong-Xia Wang

引用次数: 0

Designing a locally produced DENV-1 nucleic acid diagnostic for low resource regions with endemic disease. 设计一种地方性疾病低资源地区本地生产的DENV-1核酸诊断方法。

IF 2.6 3区化学

Analytical Methods Pub Date : 2025-10-15 DOI: 10.1039/d5ay00889a

Adam Roberts, Dushanth Seevaratnam, Ferguie B Solis, Maria Rhona G Bergantin, Dharmatov Rahula B Albano, Fortunato B Sevilla, Elizabeth A H Hall

{"title":"Designing a locally produced DENV-1 nucleic acid diagnostic for low resource regions with endemic disease.","authors":"Adam Roberts, Dushanth Seevaratnam, Ferguie B Solis, Maria Rhona G Bergantin, Dharmatov Rahula B Albano, Fortunato B Sevilla, Elizabeth A H Hall","doi":"10.1039/d5ay00889a","DOIUrl":"https://doi.org/10.1039/d5ay00889a","url":null,"abstract":"Using recombinant techniques, to support local production and availability of active diagnostic ingedients (ADIs) in regions with endemic or neglected disease, a reverse transcriptase (RT) fusion construct is reported (Δ3R5-TGP-RT), having the same modular architecture (R5-fluorescent protein-functional enzyme) as reported previously by us. In tandem with the R5-mCherry-Bst this RT construct completes the enzyme set required for RT-LAMP mediated detection of Dengue. The introduction of the thermophilic green fluorescence protein TGP, allowed a heat purification step at 95 °C to be introduced into the workflow, simplifying purification. A 3 terminal amino acid (SSK) truncation of the naturally occurring silaffin R5 binding peptide (Δ3R5) enabled improved protein purification and loading on silica and good storage stabilisation (≥3 months). L-arginine triggered elution of enzyme from silica, immediately prior to use, enabled a soluble enzyme to be delivered directly into the RT-LAMP reactions, producing a clear solution and compatibility with turbidity detection of PPi released complexes that form insoluble Mg2P2O7. A unique primer set was designed for the detection of Dengue Serotype 1 RNA, using a primer set (CAB 3), targeting the RNA-dependent RNA polymerase (RdRp), part of the NS5 region. This was chosen to minimise primer dimer formation, thereby reducing false positives. Amplification was achieved with high sensitivity (10 copies), with turbidity analysis able to distinguish positive and negative reactions. The approach developed has the potential to widen the application of LAMP diagnostics for neglected diseases such as Dengue by removing the availability of biological reagents as a limiting factor.","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145290349","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

Carvedilol microemulsion-loaded oleogel: development and validation via an HPLC method, identification of three degradation products, and toxicity prediction. 卡维地洛微乳负载油凝胶：高效液相色谱法的开发和验证，三种降解产物的鉴定和毒性预测。

IF 2.6 3区化学

Analytical Methods Pub Date : 2025-10-15 DOI: 10.1039/d5ay01393c

Ibtihal Abuhamdeh, Rania Hamed, Rima Hajjo, Nancy Sowan, Kamal Sweidan

{"title":"Carvedilol microemulsion-loaded oleogel: development and validation via an HPLC method, identification of three degradation products, and toxicity prediction.","authors":"Ibtihal Abuhamdeh, Rania Hamed, Rima Hajjo, Nancy Sowan, Kamal Sweidan","doi":"10.1039/d5ay01393c","DOIUrl":"https://doi.org/10.1039/d5ay01393c","url":null,"abstract":"In this work, carvedilol (CARV) was formulated as a microemulsion-loaded oleogel (CARV-MEOG) to enhance its solubility. An HPLC analytical method was developed and validated for assay, content uniformity, and dissolution tests. The mobile phase was composed of a 55 : 45 (v/v) mixture of 0.015 M phosphate buffer, adjusted to pH 2.7 ± 0.05, and acetonitrile, with its flow rate set at 1.2 mL min-1. The separation was conducted using Luna C18 (250 × 4.6) mm, 5 μm column at 35 °C and a wavelength of 240 nm. The injection volumes were 10 μL for the assay and content uniformity study and 100 μL for the dissolution studies. Validation was carried out in accordance with the ICH Q2(R1) guidelines. The method proved to be precise, rugged, accurate, selective, specific, and linear in the concentration range of 13.0-30.0 μg mL-1 for assay and content uniformity and 0.21-34.0 μg mL-1 for dissolution studies. In the assay, the forced degradation of CARV, CARV-MEOG, and excipients under stress conditions revealed three major degradants with well-resolved peaks, with RRT of 1.4, 3.7, and 4.2, respectively. The molecular masses of the observed degradants were determined using LC/MS, and their chemical structures were proposed. ADMET analysis showed that degradant 1 exhibits altered permeability and genotoxicity (AMES toxic), while degradants 2 and 3 retain similar pharmacokinetics to CARV.","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145290373","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

Modification of fluorene and fluorenone core via C-H functionalization. 芴和芴酮核的碳氢官能化改性。

IF 2.7 3区化学

Organic & Biomolecular Chemistry Pub Date : 2025-10-15 DOI: 10.1039/d5ob01242b

Shefali Banga, Srinivasarao Arulananda Babu

{"title":"Modification of fluorene and fluorenone core via C-H functionalization.","authors":"Shefali Banga, Srinivasarao Arulananda Babu","doi":"10.1039/d5ob01242b","DOIUrl":"https://doi.org/10.1039/d5ob01242b","url":null,"abstract":"We report the modification of fluorene and fluorenone cores, and the assembly of libraries of functionalized fluorenes/fluorenones involving the C(sp2)-H and C(sp3)-H functionalization route. Fluorene/fluorenone motifs are versatile components in materials science, and some are bioactive compounds. In this work, the C-H bonds of fluorene and fluorenone were subjected to C-H arylation, alkylation, benzylation, alkoxylation, and annulation reactions to afford modified fluorenes/fluorenones. Alternatively, various functionalized fluorenes/fluorenones were obtained by subjecting the C-H bonds of aryl or alkyl carboxamides to the C-H arylation process using iodofluorenes or iodofluorenones as the coupling partners. Overall, a comprehensive effort and synthesis of several C(1), C(2), C(3), and C(4) functionalized fluorenes, fluorenones, fluorene-fluorenone couples, fluorene-carbazole couples, π-extended bis fluorenes, and enantioenriched π-extended bis fluorenes are reported. Given the prominence of fluorene/fluorenone motifs, this work contributes to augmenting the library of fluorenes and fluorenones via a C(sp2)-H and C(sp3)-H functionalization strategy.","PeriodicalId":96,"journal":{"name":"Organic & Biomolecular Chemistry","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145290375","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