The Royal Society of Chemistry最新文献

{"title":"An ionic binaphthyl-bridged imidazole dimer for fast visible-light-driven negative photochromism in aqueous media.","authors":"Kaede Mitsuhashi, Takumi Aizawa, Jiro Abe","doi":"10.1039/d5cc04458h","DOIUrl":"10.1039/d5cc04458h","url":null,"abstract":"<p><p>We report a binaphthyl-bridged imidazole dimer bearing alkylpyridinium groups that exhibit fast and visible-light-induced negative photochromism even in aqueous media. The introduction of ionic groups not only enhances water solubility but also induces charge-transfer absorption, enabling efficient blue-light activation.</p>","PeriodicalId":67,"journal":{"name":"Chemical Communications","volume":" ","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144936374","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":"An open source for multiplexed, stable and transient flows to advance life sciences using microfluidic control automation.","authors":"Junichi Murai, Mahmoud N Abdelmoez, Keisuke Kondo, Kohei Takamuro, Keiji Nozaki, Tim Schiller, Thomas R Scheibel, Keiji Numata, Hisano Yajima, Kanako Terakado Kimura, Takao Hashiguchi, Taikopaul Kaneko, Misa Minegishi, Hirofumi Shintaku","doi":"10.1039/d5lc00551e","DOIUrl":"10.1039/d5lc00551e","url":null,"abstract":"<p><p>Multiplexed fluid control is a demanding task in various studies in life sciences and bioengineering. Herein, we present open-source microfluidic sequence automation (MiSA) that offers flexible and multiplexed fluid control for various applications, providing constant flow <i>via</i> pressure-based feedback control with 10-plex capability and pulsed flow on the order of 100 ms. MiSA was self-contained, including a pressure source, and employed an Arduino Micro to integrate ten solenoid valves, an off-the-shelf pressure regulator, and a flow sensor to balance cost and reliability. To offer stable microflow control, especially at a low flow rate under low flow resistance, MiSA used a potentiometer that tuned the range of the pressure control by leveraging the full 8-bit output from the Arduino Micro applied to the pressure regulator. We demonstrated the practical use of MiSA for multiplexed chemical reactions by performing hybridization-based <i>in situ</i> sequencing. To demonstrate the flexibility of MiSA, we showed the extensions of our system for two pressure regulations under open-loop control in flow rate by revealing three independent applications: droplet generation, microfluidic spinning of spider silk fiber, and atomization of protein solution. We envision that this open source will offer resources for researchers to explore microfluidic applications rapidly with an affordable investment.</p>","PeriodicalId":85,"journal":{"name":"Lab on a Chip","volume":" ","pages":""},"PeriodicalIF":5.4,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144936569","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}

{"title":"Atmospheric reactions of substituted butanes with OH radicals: kinetics and atmospheric implications.","authors":"Bishnupriya Kar, Balla Rajakumar","doi":"10.1039/d5cp00961h","DOIUrl":"10.1039/d5cp00961h","url":null,"abstract":"<p><p>2-Chlorobutane (2CB) and 2-aminobutane (2AB) are chiral compounds, which play a crucial role in biological complexity. These compounds can be released into the air through natural and man-made processes. Their emission into the atmosphere may influence the air quality and climate significantly. In the present work, the kinetics for the reactions of 2AB and 2CB were investigated experimentally and computationally at various temperatures. The rate coefficients for both reactions were evaluated using the SAR approach at 298 K. In addition, their impacts on the atmosphere have been discussed using atmospheric parameters. The experiments were performed using a pulsed laser photolysis - laser induced fluorescence technique for both reactions over 268-363 K. The rate coefficients were measured to be (2.42 ± 0.08) × 10^-12 and (3.03 ± 0.05) × 10^-11 cm³ molecule^-1 s^-1, for OH-initiated reactions of 2CB and 2AB, respectively. The computational calculations for these reactions were performed at the CCSD(T)/aug-cc-pVDZ//M06-2X/6-311+G(d,p) level of theory for 2CB and 2AB over 200-400 K. The rate coefficients were compared with changing the substituent on the butane chain. Cumulative atmospheric lifetime, radiative forcing, global warming potential, and acidification potential were calculated using the experimental and theoretical rate coefficients. In addition, the secondary organic compounds formed due to the reactions were analysed qualitatively using GC-MS and then compared with the theoretical results of the individual group contribution to the overall rate coefficients.</p>","PeriodicalId":99,"journal":{"name":"Physical Chemistry Chemical Physics","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144936592","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":"Covalent organic framework membranes for CO₂ separation: recent advances and challenges.","authors":"Zeyang Di, Wenjun Su, Shumin Li, Suyue Zhong, Weimin Liu, Jian Li","doi":"10.1039/d5cc03551a","DOIUrl":"https://doi.org/10.1039/d5cc03551a","url":null,"abstract":"<p><p>Global carbon dioxide (CO₂) emissions caused by the massive utilization of fossil fuels continue to rise, exacerbating the greenhouse effect. Membrane-based CO₂ separation processes are a promising technology for carbon reduction. Covalent organic framework (COF) membranes have shown great potential in the field of gas separation due to their high porosity, tunable pore size, and chemical stability. Utilizing the advantages of COFs to prepare gas separation membranes has become a current research hotspot. This review analyzes and summarizes the great advances in and challenges associated with the synthetic methods of COFs and COF membranes for CO₂ separation. Furthermore, the optimizing strategies for the construction of high-performance COF membranes for CO₂ separation were systematically summarized in terms of defect engineering, ionic liquid (IL) modification, post-modification, pore structure modulation, and inter-material synergy. And the specific applications of COF membranes in CO₂ separation and the corresponding separation mechanisms were comprehensively introduced. Finally, we give our personal insights into the challenges and opportunities for the future research on COF membranes for the CO₂ separation. It is expected that this review will enable scholars to grasp the recent progress in COF membranes for CO₂ separation in a timely manner and hence provide some valuable insights into the future investigations to accomplish further improvements.</p>","PeriodicalId":67,"journal":{"name":"Chemical Communications","volume":" ","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144936363","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":"Design and catalytic application of Zr based metal–organic framework with pillared layer mixed ligands for the synthesis of pyrazolo[3,4-b]pyridine derivatives via a cooperative vinylogous anomeric-based oxidation","authors":"Hossein Ahmadi, Mohammad Ali Zolfigol, Maryam Hajjami, Mahmoud Zarei, Mojtaba Hosseinifard and Yanlong Gu","doi":"10.1039/D5RA03078A","DOIUrl":"https://doi.org/10.1039/D5RA03078A","url":null,"abstract":"<p >The post-synthesis of metal–organic frameworks (MOFs) plays a valuable role in enhancing their properties and functionalities. Herein a pillared layer mixed ligand metal–organic framework, derived (DMOFs) from 2-aminoterephthalic acid (BDC-NH<small>₂</small>) as an <em>O</em>-donor and 1,4-diazabicyclo[2.2.2]octane (DABCO) as a <em>N</em>-donor linker based on Zr as a metal, which is functionalized with Cu(OAc)<small>₂</small> as a high-efficiency heterogonous catalyst for the synthesis of pyrazolo[3,4-<em>b</em>]pyridine derivatives. This presented work emphasizes the importance of the designability of an MOF and its multiple applications in organic chemistry, especially the synthesis of biologically active candidate compounds while considering the green chemistry principles.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 38","pages":" 31674-31682"},"PeriodicalIF":4.6,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d5ra03078a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144934494","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":"Novel chalcogen and halogen surface functional groups for tuning the mechanical properties of TMDs/MXenes heterojunctions.","authors":"Yuqian Zhang, Zhiwei Liu, Siyu Zheng, Changyang Yu, Siliang Yue, Chenliang Li, Hui Qi","doi":"10.1039/d5cp01389e","DOIUrl":"https://doi.org/10.1039/d5cp01389e","url":null,"abstract":"<p><p>MXenes exhibit remarkable mechanical properties due to their unique structural properties and strong atomic bonding, making them highly competitive among 2D materials. Forming heterojunctions between TMDs and MXenes offers a promising strategy to enhance material performance for advanced applications. Although extensive studies have explored the electronic and chemical properties of MXenes-based heterojunctions, investigations into their mechanical properties, particularly the effects of surface functional groups, remain limited. This work systematically investigates the structural and mechanical properties of pristine MXenes and their heterojunctions with TMDs, focusing on how novel chalcogen (S and Se) and halogen (Cl and Br) surface functional groups tune mechanical behavior, anisotropy, and microscopic failure mechanisms. Our results indicate that while surface functionalization generally reduces tensile strength, it enhances the ductility of the heterojunctions. Among the functional groups studied, -Se functionalization induces the most significant improvement in flexibility, indicating potential for applications in flexible devices. Compared with conventional -O or -F terminations reported in previous studies, these newly synthesized functional groups induce distinct anisotropic mechanical responses and tunable interfacial bonding. These findings provide a deeper understanding of the mechanical tuning of TMDs/MXenes heterojunctions by surface functional groups and offer valuable insights into their design for next-generation flexible electronics devices, high-performance sensors and thin-film batteries.</p>","PeriodicalId":99,"journal":{"name":"Physical Chemistry Chemical Physics","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144936776","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":"Selective borylation of methane by an iron(III) dihydride catalyst.","authors":"Chhaya Thadhani, Rahul Kalita, Bharti Rana, Poorvi Gupta, Swapnaneel Sarmah, Kuntal Manna","doi":"10.1039/d5cc03130c","DOIUrl":"https://doi.org/10.1039/d5cc03130c","url":null,"abstract":"<p><p>Chemoselective borylation of methane offers a promising route to organoboron synthesis. We report a porous zirconium UiO-MOF confined mononuclear iron(III) dihydride catalyst enabling efficient monoborylation of CH₄ using HBpin at 185 °C to afford methyl boronic acid pinacol ester in 85% yield with a cumulative TON of up to 921.</p>","PeriodicalId":67,"journal":{"name":"Chemical Communications","volume":" ","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144936470","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":"Design optimization of mutual dissolution layer and diffusion interface layer in planar heterojunction near-infrared organic phototransistors for ultrahigh photosensitivity","authors":"Tao Han, Yimin Zhang, Tianxia Li, Rui Jia, Qingpeng Lai, Bin Li, Suolin Wu, Xianhao Qian, Shufang Ding, Yaqi Chen and Chunzhi Jiang","doi":"10.1039/D5RA05574A","DOIUrl":"https://doi.org/10.1039/D5RA05574A","url":null,"abstract":"<p >The interfacial mutual solubility can result in a random distribution of donor and acceptor materials during the spin-coating step in the fabrication of planar heterojunction (PHJ) near-infrared (NIR) organic phototransistors. In this case, deep trap states are induced by acceptors, accelerating electron-hole recombination, ultimately impairing the photoresponsivity of the phototransistor. To solve this issue, a controllable mutual dissolution layer (formed by co-solvent treatment) combined with a diffusion interface layer (formed by the solvent vapor annealing (SVA) method) was introduced to achieve a more ordered arrangement of donors and acceptors, thereby enhancing the electrical performance of PHJ-based NIR phototransistors. Compared with a PDPP3T/PC<small>₆₁</small>BM CF device, a PDPP3T/PC<small>₆₁</small>BM THF : CF (SVA) device in which the PC<small>₆₁</small>BM layer is spin-coated with THF : CF co-solvent and with SVA exhibited a significant performance improvement. The device exhibits a reduction in <em>V</em><small>_o</small> from 23 V to 4 V, a 5-fold increase in Δ<em>V</em><small>_th</small> (up to ∼26.0 V), a 30-fold enhancement in photocurrent (Δ<em>I</em><small>_ph</small> ∼64.6 μA), and a dramatic rise in photosensitivity (<em>I</em><small>_ph</small>/<em>I</em><small>_dark</small>) from 205 to 5.6 × 10<small>⁸</small> (850 nm @ 0.1 mW cm<small>⁻²</small>).</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 38","pages":" 31586-31596"},"PeriodicalIF":4.6,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d5ra05574a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144929166","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":"High molecular weight polyethylene via the spatial proximity of benzosuberyl in iminopyridine nickel catalysts","authors":"Areej Khalid, Qaiser Mahmood, Ayesha Razzaq, Yanping Ma, Geng Ren, Yizhou Wang, Tongling Liang and Wen-Hua Sun","doi":"10.1039/D5RA05407A","DOIUrl":"https://doi.org/10.1039/D5RA05407A","url":null,"abstract":"<p >Iminopyridine nickel catalysts are typically prone to facile chain transfer reactions, resulting in low molecular weight polyethylenes. In this study, a spatial proximity strategy was employed in 5-dibenzosuberyl-modified iminopyridine nickel catalysts to enhance ethylene polymerization. Using a template reaction between acetylpyridine and 5-dibenzosuberyl-functionalized aniline, a series of 2-(1-(2,6-bis(5-dibenzosuberyl)-4-(alkyl)phenylimino)ethyl)pyridine ligands were synthesized and subsequently reacted with (1,2-dimethoxyethane)NiBr<small>₂</small> to afford the corresponding nickel complexes. Single-crystal X-ray diffraction revealed a sandwich-like arrangement in the resulting nickel complexes, with short centroid-to-plane distances (average: 3.194 Å for <strong>Ni1<small>^Me</small></strong> and 3.268 Å for <strong>Ni2<em><small>ⁱ</small></em><small>^Pr</small></strong>), suggesting close spatial proximity between the benzosuberyl phenyl caps and the chelate plane. Compared to DEAC, activation with MAO resulted in a higher activity (up to 2.2 × 10<small>⁶</small> g mol<small>⁻¹</small> h<small>⁻¹</small>), significantly increased molecular weights (56–182 kg mol<small>⁻¹</small>), and a narrower dispersity (PDI = 1.5–1.8). Notably, the polymer molecular weights were 10 to 100 times greater than those of most previously reported iminopyridine nickel catalysts lacking benzosuberyl steric substituents, indicating the strong and advantageous impact of the spatial proximity of benzosuberyl toward the chelate plane on polymerization. Moreover, in the case of substituent variations in the catalyst, dibenzosuberyl substituents at all the <em>ortho</em>- and <em>para</em>-positions of aniline demonstrated a positive effect on both the monomer insertion rate and chain propagation, leading to high catalytic activity and polymer molecular weights. The resulting polyethylene predominantly contained methyl branches, with an overall branching density of 53 to 99/1000C, as confirmed by high-temperature NMR measurements.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 38","pages":" 31597-31608"},"PeriodicalIF":4.6,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ra/d5ra05407a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144929205","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":"Ru-catalysed stereoselective glycosylation of C-2 substituted glycals: an efficient route to 3-deoxy-1,2-difunctionalized pseudoglycals.","authors":"Ram P Pandey, Bindu Tiwari, Manish Kumar Sharma, Nazar Hussain","doi":"10.1039/d5ob01261a","DOIUrl":"10.1039/d5ob01261a","url":null,"abstract":"<p><p>The stereoselective formation of glycosidic bonds remains a key challenge in carbohydrate chemistry, with far-reaching implications for glycoscience, drug development, and materials research. We report a novel method for glycosylation of glycal-derived substrates mediated by Ru(II) catalysis. Glycosylation selectivity is modulated by the presence or absence of external nucleophiles in the reaction medium. This transformation is notable for its operational simplicity, scalability, and use of cost-effective, air-stable Ru(II) catalysts. Notably, the reaction exhibits exceptional β-selectivity, offering an efficient and streamlined approach for synthesising 3-deoxy-1,2-difunctionalized glycals.</p>","PeriodicalId":96,"journal":{"name":"Organic & Biomolecular Chemistry","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144936545","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}