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Cover Picture: (Helv. Chim. Acta 4/2025)
IF 1.5 4区 化学
Helvetica Chimica Acta Pub Date : 2025-04-16 DOI: 10.1002/hlca.202570401
{"title":"Cover Picture: (Helv. Chim. Acta 4/2025)","authors":"","doi":"10.1002/hlca.202570401","DOIUrl":"https://doi.org/10.1002/hlca.202570401","url":null,"abstract":"<p>\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure>\u0000 </p>","PeriodicalId":12842,"journal":{"name":"Helvetica Chimica Acta","volume":"108 4","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/hlca.202570401","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840706","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
Cover Picture: (Helv. Chim. Acta 3/2025)
IF 1.5 4区 化学
Helvetica Chimica Acta Pub Date : 2025-03-14 DOI: 10.1002/hlca.202570301
{"title":"Cover Picture: (Helv. Chim. Acta 3/2025)","authors":"","doi":"10.1002/hlca.202570301","DOIUrl":"https://doi.org/10.1002/hlca.202570301","url":null,"abstract":"<p>\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure>\u0000 </p>","PeriodicalId":12842,"journal":{"name":"Helvetica Chimica Acta","volume":"108 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/hlca.202570301","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629881","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
Beginning of Second Mandate as Editors-in-Chief for Helvetica Chimica Acta
IF 1.5 4区 化学
Helvetica Chimica Acta Pub Date : 2025-02-26 DOI: 10.1002/hlca.202500029
Eva Hevia, Jérôme Waser
{"title":"Beginning of Second Mandate as Editors-in-Chief for Helvetica Chimica Acta","authors":"Eva Hevia,&nbsp;Jérôme Waser","doi":"10.1002/hlca.202500029","DOIUrl":"https://doi.org/10.1002/hlca.202500029","url":null,"abstract":"<p>The beginning of 2025 marks the completion of our first 3-year mandate as Editors-in-Chief of <i>Helvetica Chimica Acta</i>. This has been an exciting and intensive period of time, which has allowed us to drive forward our vision for the journal. We are now delighted to renew our commitment with <i>Helvetica</i> for a second (and last) three year mandate. Having said that, we also feel that now it is the right time to reflect on what we have achieved so far and to give new impulses for the future.</p>","PeriodicalId":12842,"journal":{"name":"Helvetica Chimica Acta","volume":"108 4","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/hlca.202500029","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840824","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
Thermoresponsive Nanocarriers Transduced by Inorganic Nanoparticles: Design Considerations and Applications in Drug Delivery
IF 1.5 4区 化学
Helvetica Chimica Acta Pub Date : 2025-02-22 DOI: 10.1002/hlca.202400193
Anamarija Nikoletić, Mirela Maleković, Gül Kozalak, Cornelia G. Palivan, Oya Tagit
{"title":"Thermoresponsive Nanocarriers Transduced by Inorganic Nanoparticles: Design Considerations and Applications in Drug Delivery","authors":"Anamarija Nikoletić,&nbsp;Mirela Maleković,&nbsp;Gül Kozalak,&nbsp;Cornelia G. Palivan,&nbsp;Oya Tagit","doi":"10.1002/hlca.202400193","DOIUrl":"https://doi.org/10.1002/hlca.202400193","url":null,"abstract":"<p>Thermoresponsive polymers, which undergo phase transitions within physiologically tolerated temperatures, are key to developing drug delivery systems (DDS) with precise spatial and temporal control, potentially addressing challenges associated with the treatment of complex diseases. Inorganic nanoparticles with unique optical, electronic, and magnetic properties serve as efficient transducers, converting external stimuli into localized heat to trigger thermoresponsive nanocarriers. This review explores the design and application of thermoresponsive nanocarriers transduced by inorganic nanoparticles as DDS. Following a brief description of temperature-triggered phase transition of polymers and heat generation mechanisms by inorganic nanoparticles, strategies to integrate these components into hybrid systems are described. Examples demonstrating the utility of these hybrid systems as advanced DDS are discussed, highlighting their potential for precise drug release alongside theranostic capabilities by combining therapy with imaging. Despite the challenges in design, synthesis, and biological applications, thermoresponsive polymer-inorganic hybrids hold immense promise for transforming drug delivery and biomedical innovations.</p>","PeriodicalId":12842,"journal":{"name":"Helvetica Chimica Acta","volume":"108 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/hlca.202400193","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629875","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
Cover Picture: (Helv. Chim. Acta 2/2025)
IF 1.5 4区 化学
Helvetica Chimica Acta Pub Date : 2025-02-14 DOI: 10.1002/hlca.202570201
{"title":"Cover Picture: (Helv. Chim. Acta 2/2025)","authors":"","doi":"10.1002/hlca.202570201","DOIUrl":"https://doi.org/10.1002/hlca.202570201","url":null,"abstract":"<p>\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure>\u0000 </p>","PeriodicalId":12842,"journal":{"name":"Helvetica Chimica Acta","volume":"108 2","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/hlca.202570201","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423736","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
Recent Progress in Visible Light-Mediated Synthesis of γ-lactams
IF 1.5 4区 化学
Helvetica Chimica Acta Pub Date : 2025-01-30 DOI: 10.1002/hlca.202400206
Suman Pradhan, Shoubhik Das
{"title":"Recent Progress in Visible Light-Mediated Synthesis of γ-lactams","authors":"Suman Pradhan,&nbsp;Shoubhik Das","doi":"10.1002/hlca.202400206","DOIUrl":"https://doi.org/10.1002/hlca.202400206","url":null,"abstract":"<p>The integration of sustainable practices, such as employing renewable light sources for synthesizing valuable synthetic scaffolds, has been progressing over the past few decades. Among these noteworthy organic frameworks, lactams, particularly γ-lactams, have established their prominence due to their extensive applications in the pharmaceutical, agricultural, and medicinal domains. This growing significance of γ-lactams has spurred considerable interest in their synthesis, especially via milder, more sustainable, and environmentally friendly methods. In recent years, numerous innovative reaction mechanisms have been explored, highlighting how photocatalysis can enable the formation of γ-lactams from readily accessible precursors through C−N bond formation and cyclization processes. This review emphasizes the potential of photocatalytic strategies to not only enhance current synthetic methods for γ-lactams but also foster the development of greener and more sustainable chemical processes for the future.</p>","PeriodicalId":12842,"journal":{"name":"Helvetica Chimica Acta","volume":"108 4","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840948","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
Introduction for the Special Collection in the Honor of Scott Denmark
IF 1.5 4区 化学
Helvetica Chimica Acta Pub Date : 2025-01-30 DOI: 10.1002/hlca.202400183
Jeffrey Bode, Cathleen Crudden
{"title":"Introduction for the Special Collection in the Honor of Scott Denmark","authors":"Jeffrey Bode,&nbsp;Cathleen Crudden","doi":"10.1002/hlca.202400183","DOIUrl":"https://doi.org/10.1002/hlca.202400183","url":null,"abstract":"<p>\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure>\u0000 </p>","PeriodicalId":12842,"journal":{"name":"Helvetica Chimica Acta","volume":"108 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/hlca.202400183","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629902","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
Synthesis of α-Fluoroketones from Carboxylic Acids via Decarboxylation of Fluorinated Malonates
IF 1.5 4区 化学
Helvetica Chimica Acta Pub Date : 2025-01-29 DOI: 10.1002/hlca.202400187
Raffael Davenport, Rolandas Cibiras, Gabriel Schäfer
{"title":"Synthesis of α-Fluoroketones from Carboxylic Acids via Decarboxylation of Fluorinated Malonates","authors":"Raffael Davenport,&nbsp;Rolandas Cibiras,&nbsp;Gabriel Schäfer","doi":"10.1002/hlca.202400187","DOIUrl":"https://doi.org/10.1002/hlca.202400187","url":null,"abstract":"<p>α-Fluoroketones are versatile intermediates for the synthesis of fluorinated heterocycles and other fluorine-containing building blocks. We have recently disclosed a novel route to such an α-fluoroketone using the corresponding benzoic acid as a starting material. The reaction sequence started with the CDI-activation of the carboxylic acid and reaction with diethyl malonate, fluorination of the resulting acyl malonate with Selectfluor, and finally a double-decarboxylation to provide the desired α-fluoroketone in 73 % yield over three telescoped steps. We were interested in the generality of this approach to access α-fluoroketones from readily available carboxylic acids. In this article, we disclose the crucial modifications of the reaction conditions that were needed to make them broadly applicable to a diverse array of carboxylic acids. Under the optimized conditions, a wide range of α-fluoroketones were isolated in good to excellent yields and in high purity.</p>","PeriodicalId":12842,"journal":{"name":"Helvetica Chimica Acta","volume":"108 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629858","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
Effect of Particle Size and Alloying with Gallium and Zinc in Copper Nanoparticles from Ab Initio Molecular Dynamics
IF 1.5 4区 化学
Helvetica Chimica Acta Pub Date : 2025-01-24 DOI: 10.1002/hlca.202400124
Andreas Müller, Aleix Comas-Vives, Christophe Copéret
{"title":"Effect of Particle Size and Alloying with Gallium and Zinc in Copper Nanoparticles from Ab Initio Molecular Dynamics","authors":"Andreas Müller,&nbsp;Aleix Comas-Vives,&nbsp;Christophe Copéret","doi":"10.1002/hlca.202400124","DOIUrl":"https://doi.org/10.1002/hlca.202400124","url":null,"abstract":"<p>Supported nanoparticles (NPs) are an intense field of research in industry and academia due to their unique catalytic properties. Yet, establishing relationships between structure and activity is challenging due to multiple possible compositions, interfaces, and alloy formation. This is especially pronounced for bimetallic NPs used in the CO<sub>2</sub>-hydrogenation-to-methanol, where the structure responds dynamically to the chemical potential of the reactants and products, resulting in distinct surface structures depending on the exact reaction conditions. These phenomena have been highlighted by combining <i>ab initio</i> Molecular Dynamics (AIMD) and Metadynamics (MTD) with <i>in situ</i> X-ray absorption spectroscopy, chemisorption, and CO-IR. Here, we aim to understand how particle size and simulation temperature influence the structure and dynamics of small Cu NPs using the diffusion coefficients and the radial distribution function/atomic pair density function as descriptors using AIMD simulations. We found that decreasing the particle size or increasing the simulation temperature results in increased atom mobility, highlighted by the increased metal diffusion and resulting in reduced particle crystallinity. We also find that alloying Cu with Ga significantly increases the diffusion of both elements in the particle compared to the monometallic ones. In contrast, such diffusion lies in between the individual elements composing the CuZn particles.</p>","PeriodicalId":12842,"journal":{"name":"Helvetica Chimica Acta","volume":"108 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/hlca.202400124","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629780","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
Structure and Magnetic Properties of a Series of Uranium Bis-Siloxide Complexes
IF 1.5 4区 化学
Helvetica Chimica Acta Pub Date : 2025-01-23 DOI: 10.1002/hlca.202400189
Luciano Barluzzi, Ivica Zivkovic, Farzaneh Fadaei-Tirani, Rodolphe Clérac, Marinella Mazzanti
{"title":"Structure and Magnetic Properties of a Series of Uranium Bis-Siloxide Complexes","authors":"Luciano Barluzzi,&nbsp;Ivica Zivkovic,&nbsp;Farzaneh Fadaei-Tirani,&nbsp;Rodolphe Clérac,&nbsp;Marinella Mazzanti","doi":"10.1002/hlca.202400189","DOIUrl":"https://doi.org/10.1002/hlca.202400189","url":null,"abstract":"<p>Despite their synthetic interest and potential attractive properties, the preparation of heteroleptic U(III) complexes containing monodentate ligands remains challenging. Here we report the synthesis, structure and magnetic properties of three heteroleptic U(III) complexes containing two siloxide donors in the coordination sphere. The bis-siloxide monoiodide complex [U(OSi(O<sup>t</sup>Bu)<sub>3</sub>)<sub>2</sub>I(thf)<sub>3</sub>], <b>1</b> provides a very attractive precursor for accessing heteroleptic complexes and rationally modify the binding angle between the two strongly donating siloxide ligands. Here we reacted <b>1</b> with macrocyclic ligands to yield complexes [[U(OSi(O<sup>t</sup>Bu)<sub>3</sub>)<sub>2</sub>(crypt)]I, <b>3</b> and [[U(OSi(O<sup>t</sup>Bu)<sub>3</sub>)<sub>2</sub>(18c6)]I, <b>4</b>. Magnetic studies of these compounds offer a snapshot on how the SMM properties depend on the local symmetry in the presence of siloxide ligands. The static and dynamic magnetic properties of these compounds reveal a weak dependence of their single-molecule magnet behavior on the local symmetry.</p>","PeriodicalId":12842,"journal":{"name":"Helvetica Chimica Acta","volume":"108 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629773","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
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