The Royal Society of Chemistry最新文献

{"title":"Imidazole-catalyzed construction of bridged bicyclo [3.3.1] ketals <i>via</i> formal [3 + 3]-cycloaddition of naphthols and 2-hydroxyl chromene derivatives.","authors":"Asha Budakoti, Priyankar Jha, Meenakshi Verma, Prema G Vasudev, Atul Gupta","doi":"10.1039/d4ob02068e","DOIUrl":"https://doi.org/10.1039/d4ob02068e","url":null,"abstract":"<p><p>Bridged bicyclo[3.3.1]nonanes having the <i>O</i>,<i>O</i>-ketal subunit are widely found in medicinal compounds. While several acid-catalyzed approaches have been reported for the construction of ketals, this study discloses an imidazole-catalyzed modular construction of bicyclo[3.3.1]nonanes from naphthols/phenols and 3-acyl-2-hydroxyl chromenes. The proposed reaction pathway follows a formal [3 + 3] cycloaddition of phenols and an oxonium dipolar intermediate. The reaction is efficient regarding scalability, environmentally benign conditions, and resulting in the products in good to excellent yields.</p>","PeriodicalId":96,"journal":{"name":"Organic & Biomolecular Chemistry","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143456443","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}

{"title":"Improving the efficiency of Cr(vi) reduction and adsorption by Fe3O4 using ZSM-5 zeolite support prepared through various methods†","authors":"Nichapha Senamart, Worapol Yingyuen, Waranya Obrom, Tatchapol Nanmong, Surangkhana Budsombat, Jatuporn Wittayakun, Sanchai Prayoonpokarach and Sirinuch Loiha","doi":"10.1039/D4RA06845A","DOIUrl":"https://doi.org/10.1039/D4RA06845A","url":null,"abstract":"<p >The study involved the synthesis of magnetite (Fe<small>₃</small>O<small>₄</small>) and zeolite-supported Fe<small>₃</small>O<small>₄</small> (Fe/Z) using co-precipitation (COP) and hydrothermal (HYD) methods which proved effective for removing Cr(<small>VI</small>) from contaminated water. X-ray diffraction (XRD) analysis showed that the Fe<small>₃</small>O<small>₄</small> phase had a cubic crystal structure. The COP method resulted in lower crystallinity compared to the HYD method. The different preparation methods also led to variations in the morphologies and sizes of the Fe<small>₃</small>O<small>₄</small> particles. The HYD-prepared sample exhibited a uniform spherical shape with sizes of 400–500 nm, while the COP-prepared samples showed rod-like and granule shapes with smaller particle sizes of 20–50 nm. The study also investigated the adsorption ability and reducibility of Cr(<small>VI</small>) on the Fe<small>₃</small>O<small>₄</small> adsorbents. It was found that the crystallinity, shapes, and sizes of Fe<small>₃</small>O<small>₄</small> significantly influenced the adsorption capacity and stability of the Cr-adsorbed species. Additionally, this work demonstrated that the zeolite supports enhanced the adsorption capabilities of Fe<small>₃</small>O<small>₄</small>, particularly in the HYD-prepared samples, achieving an adsorption capacity of 2.33 mg per g Fe by creating stable Cr-adsorbed species. X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) confirmed the Cr species adsorbed on Fe/Z_HYD, identifying ion-exchange lattice structures of Fe<small>_{3−<em>x</em>}</small>Cr<small>_<em>x</em></small>O<small>₄</small> and Fe<small>_{1−<em>x</em>}</small>CrOOH as the most stable forms. This study provides insights into the potential of Fe<small>₃</small>O<small>₄</small>/ZSM-5 zeolite for Cr(<small>VI</small>) remediation.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 8","pages":" 5808-5821"},"PeriodicalIF":3.9,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d4ra06845a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143455425","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}

{"title":"Revitalizing Li–S batteries: the power of electrolyte additives","authors":"Derek Ovc-Okene, Lakshmi Shiva Shankar, Alen Vizintin and Robert Kun","doi":"10.1039/D4RA06245K","DOIUrl":"https://doi.org/10.1039/D4RA06245K","url":null,"abstract":"<p >Lithium–sulfur (Li–S) batteries have garnered significant attention as promising next-generation energy storage solutions due to their high energy density and cost efficiency. However, the broad adoption of Li–S batteries is impeded by several critical issues. These include the intrinsically low conductivities of sulfur (S) and lithium sulfide (Li<small>₂</small>S), the polysulfide shuttle effect, and dendrite formation on the lithium (Li) electrode, among other challenges. Overcoming these obstacles is crucial to realizing the full potential of Li–S batteries. A key step towards improving Li–S battery performance is the optimization of electrolytes, with a particular focus on enhancing cell cyclability, rate capability, safety, and lifespan. This review examines the current advancements in various electrolyte additive options, including their concepts, designs, and materials, and how the electrolyte's final chemical and physical properties influence the overall performance of Li–S batteries. The aim is to provide a comprehensive framework for the rational selection of future electrolyte additives for Li–S batteries, based on the available concepts, and to evaluate the existing electrolyte additives.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 7","pages":" 5381-5404"},"PeriodicalIF":3.9,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d4ra06245k?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143446392","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}

{"title":"Correction: Strategies for the detection of site-specific DNA methylation and its application, opportunities and challenges in the field of electrochemical biosensors.","authors":"Chenliu Ye, Zhibin Zhao, Penghui Lai, Chunmei Chen, Fumei Jian, Haiying Liang, Qiongying Guo","doi":"10.1039/d5ay90024g","DOIUrl":"https://doi.org/10.1039/d5ay90024g","url":null,"abstract":"<p><p>Correction for 'Strategies for the detection of site-specific DNA methylation and its application, opportunities and challenges in the field of electrochemical biosensors' by Chenliu Ye <i>et al.</i>, <i>Anal. Methods</i>, 2024, <b>16</b>, 5496-5508, https://doi.org/10.1039/D4AY00779D.</p>","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143456312","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}

{"title":"<i>Materials Horizons</i> Emerging Investigator Series: Dr Katharina Ehrmann, Institute for Applied Synthetic Chemistry, Technische Universität Wien, Austria.","authors":"","doi":"10.1039/d5mh90020d","DOIUrl":"https://doi.org/10.1039/d5mh90020d","url":null,"abstract":"<p><p>Our Emerging Investigator Series features exceptional work by early-career researchers working in the field of materials science.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143456379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Racemic peptide assembly boosts biocatalysis.","authors":"Mari C Mañas-Torres, Paola Alletto, Simone Adorinni, Attilio V Vargiu, Luis Álvarez de Cienfuegos, Silvia Marchesan","doi":"10.1039/d4ob01987c","DOIUrl":"https://doi.org/10.1039/d4ob01987c","url":null,"abstract":"<p><p>Racemic assembly of minimalistic heterochiral tripeptides boosts their biocatalytic activity for ester hydrolysis. The amino acidic sequences are bioinspired and feature histidine (His) as a catalytically active residue, and the diphenylalanine (Phe-Phe) motif to drive self-assembly into anisotropic nanostructures that gel. This study thus provides key insights for the design of green biocatalysts with improved activity.</p>","PeriodicalId":96,"journal":{"name":"Organic & Biomolecular Chemistry","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143456451","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}

{"title":"Design of PVT driven forward osmosis and membrane distillation pilot plant for co-production of water and electricity","authors":"Ali Seid Ali and Tijani Bounahmidi","doi":"10.1039/D4RA07525K","DOIUrl":"https://doi.org/10.1039/D4RA07525K","url":null,"abstract":"<p >Desalination by photovoltaic thermal (PVT)-driven forward osmosis (FO) and membrane distillation (MD) stands out for its lower operational costs and reduced carbon emissions. However, the feasibility of a pilot-scale PVT-driven FO–MD system remains unexplored, which is crucial for industrialization. This study introduces a pilot PVT-FO–MD desalination system designed for simultaneous water and electricity production. The system aims to assess the feasibility of the process, evaluate its costs, and explore its potential for industrial applications. While PVT collectors have higher costs than standard PV panels, they offer improved electrical efficiency and additional thermal power generation, making them more efficient overall. The optimal design was tested using saline water with a concentration of 10 000 mg per liter and a NaCl draw solute with a concentration of 1 molarity. The system produces 172.1 kW h of thermal energy, 93.9 kW h of electrical energy, and 269 L of water daily. The FO water flux varies between 8.13 and 8.29 LMH, while the MD water flux fluctuates between 2.72 and 4.25 LMH throughout the year. Using average yearly weather data, the system produces 33 872 kW h of electrical energy, 65 846 kW h of thermal energy, and 106.84 m<small>³</small> of water annually. Increasing the desalination unit size boosts average water production to 126.47 m<small>³</small> annually. The project requires an initial capital investment of 212 741.38 USD. The return on investment is 11.84%, with a breakeven point at nine years. The net present value turns positive just before the end of the project's lifetime at a 10% interest rate. Although this type of system has not yet been commercialized, further studies are recommended to enhance its market competitiveness.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 8","pages":" 5751-5765"},"PeriodicalIF":3.9,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d4ra07525k?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143446400","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}

{"title":"Recyclable construction of multi-layer films with an impedance gradient design for high-efficiency electromagnetic absorption performance.","authors":"Yu Chen, Bin Quan, Litao Lin, Linyu Xie, Haoyu Jiao, Xinyi Min, Gaoyuan Yu, Binglin He, Xiaochi Lu, Jiajia Liu, Yan Chen, Xiaogu Huang","doi":"10.1039/d4cc06768a","DOIUrl":"https://doi.org/10.1039/d4cc06768a","url":null,"abstract":"<p><p>This work presents the first recyclable multi layer films with an impedance optimization design, created <i>via</i> simulation screening, that consists of films ordered and arranged to enhance the absorption bandwidth from 0 GHz to 2.17 GHz. The results presented here provide valuable insights into the design and construction of high-efficiency microwave absorption films by environmentally friendly and sustainable technological means.</p>","PeriodicalId":67,"journal":{"name":"Chemical Communications","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143456229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Qualitative and quantitative analysis of metronidazole formulations using a low-cost near infrared transmission spectrophotometer and chemometric tools.","authors":"Moussa Yabré, Abdoul Karim Sakira, Moumouni Bandé, Kouka Luc Delma, Isaïe Nyamba, Loconon Y Achille Yemoa, Souleymane Fofana, Touridomon Issa Somé","doi":"10.1039/d4ay02251c","DOIUrl":"https://doi.org/10.1039/d4ay02251c","url":null,"abstract":"<p><p>For effective drug quality control and detection of falsified and substandard medicines in developing countries, there is an urgent need to develop reliable, rapid, and inexpensive analytical methods. In this work, a methodology combining a low-cost near infrared transmission spectrophotometer with chemometrics and sample analysis in solution has been applied to develop qualitative and quantitative methods to analyze metronidazole in various formulations. To achieve this, calibration and validation solution samples of metronidazole at different concentrations were prepared. The qualitative method consisted of building a model based on a data driven soft independent modeling of class analogy using metronidazole samples at the concentration of 100 mg L^-1 as the target class. The built model allowed a satisfactory identification of metronidazole at the target concentration and a clear discrimination of the excipient mixture and metronidazole samples at other concentration levels and related active pharmaceutical ingredients used to mimic falsified and substandard drugs. The quantitative method was based on a partial least squares regression model allowing the quantification of metronidazole in the concentration range of 50-125 mg L^-1. The regression model was fully validated according to the accuracy profile methodology. Both qualitative and quantitative methods were successfully employed to analyze various metronidazole tablet samples collected in Burkina Faso. The obtained outcomes underline the feasibility of using these economically accessible portable spectrophotometers as a first line screening tool for drug quality control and detection of falsified and substandard drugs in developing countries.</p>","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143456314","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}

{"title":"Soft, wearable, microfluidic system for fluorometric analysis of loss of amino acids through eccrine sweat.","authors":"Seunghee H Cho, Soongwon Cho, Zengyao Lv, Yurina Sekine, Shanliangzi Liu, Mingyu Zhou, Ravi F Nuxoll, Evangelos E Kanatzidis, Roozbeh Ghaffari, Donghwan Kim, Yonggang Huang, John A Rogers","doi":"10.1039/d4lc00734d","DOIUrl":"https://doi.org/10.1039/d4lc00734d","url":null,"abstract":"<p><p>Amino acids are essential for protein synthesis and metabolic processes in support of homeostatic balance and healthy body functions. This study quantitatively investigates eccrine sweat as a significant channel for loss of amino acids during exercise, to improve an understanding of amino acid turnover and to provide feedback to users on the need for supplement intake. The measurement platform consists of a soft, skin-interfaced microfluidic system for real-time analysis of amino acid content in eccrine sweat. This system relies on integrated fluorometric assays and smartphone-based imaging techniques for quantitative analysis, as a simple, cost-effective approach that does not require electrochemical sensors, electronics or batteries. Human subject studies reveal substantial amino acid losses in sweat from working muscle regions during prolonged physical activities, thereby motivating the need for dietary supplementation. The findings suggest potential applications in healthcare, particularly in athletic and clinical settings, where maintaining amino acid balance is critical for ensuring proper homeostasis.</p>","PeriodicalId":85,"journal":{"name":"Lab on a Chip","volume":" ","pages":""},"PeriodicalIF":6.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143456376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}