Conventional ionic liquids (ILs) used for cellulose modification, while effective in dissolving cellulose, often induce a transition from the robust cellulose I crystalline structure to the weaker cellulose II crystalline phase, compromising material strength. To overcome this limitation, we developed six types of tetrabutylammonium (TBA)-based organic salts, including TBA acetate, aimed at modifying the cellulose surface while preserving its native crystalline structure. Regenerated cellulose nanofibers (CNFs) treated with these TBA-based salts were analyzed via X-ray diffraction and scanning electron microscopy, revealing that TBA maleate minimally affected crystallinity and retained the cellulose I crystalline structure. Subsequently, TBA maleate was employed as the solvent medium for the surface modification (acetylation) of CNFs, achieving a degree of substitution of 0.5. The modified CNF acetate (CNF-ac) was blended with commercial cellulose acetate (CA) at ratios of 1, 3, and 5 wt% to evaluate its reinforcing potential. The cellulose I-rich CNF derivative exhibited superior dispersion within the CA matrix, leading to a 46% enhancement in mechanical properties. Overall, this study highlights the potential of crystalline structure-preserving organic salts for the development of high-performance cellulose-based composite materials.
{"title":"Cellulose acetate composites with bamboo cellulose nanofibers: crystallinity preservation during tetrabutylammonium salt-catalyzed surface acetylation.","authors":"Hao Wang, Kyoya Shirotani, Naoki Wada, Kenji Takahashi","doi":"10.1039/d5ra08474a","DOIUrl":"https://doi.org/10.1039/d5ra08474a","url":null,"abstract":"<p><p>Conventional ionic liquids (ILs) used for cellulose modification, while effective in dissolving cellulose, often induce a transition from the robust cellulose I crystalline structure to the weaker cellulose II crystalline phase, compromising material strength. To overcome this limitation, we developed six types of tetrabutylammonium (TBA)-based organic salts, including TBA acetate, aimed at modifying the cellulose surface while preserving its native crystalline structure. Regenerated cellulose nanofibers (CNFs) treated with these TBA-based salts were analyzed <i>via</i> X-ray diffraction and scanning electron microscopy, revealing that TBA maleate minimally affected crystallinity and retained the cellulose I crystalline structure. Subsequently, TBA maleate was employed as the solvent medium for the surface modification (acetylation) of CNFs, achieving a degree of substitution of 0.5. The modified CNF acetate (CNF-ac) was blended with commercial cellulose acetate (CA) at ratios of 1, 3, and 5 wt% to evaluate its reinforcing potential. The cellulose I-rich CNF derivative exhibited superior dispersion within the CA matrix, leading to a 46% enhancement in mechanical properties. Overall, this study highlights the potential of crystalline structure-preserving organic salts for the development of high-performance cellulose-based composite materials.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":"16 8","pages":"7421-7429"},"PeriodicalIF":4.6,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12875375/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146140391","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}
Stephan Barcikowski, Brian Cantor, Varun Chaudhary, Sheng Dai, Tushar Gupta, Andrea Kirsch, Tim Kunzmann, Chih-Heng Lee, Alfred Ludwig, Nicola Morley, Alexandre Nominé, Dierk Raabe, Natalia F Shkodich, Dongsheng Wen
{"title":"Magnetic properties of high-entropy alloy nanostructures: general discussion.","authors":"Stephan Barcikowski, Brian Cantor, Varun Chaudhary, Sheng Dai, Tushar Gupta, Andrea Kirsch, Tim Kunzmann, Chih-Heng Lee, Alfred Ludwig, Nicola Morley, Alexandre Nominé, Dierk Raabe, Natalia F Shkodich, Dongsheng Wen","doi":"10.1039/d5fd90065d","DOIUrl":"https://doi.org/10.1039/d5fd90065d","url":null,"abstract":"","PeriodicalId":76,"journal":{"name":"Faraday Discussions","volume":" ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146123237","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}
Heng Song, Li Fang, Jiahao Wang, Xingwei Cai, Yougen Cai, Ying Li, Jia-Jia Zhao, Lei Chen, Hongxian Sun, Chen Xu
A decarboxylative oxidation and ring-opening protocol of carboxylic acids via tungsten-catalyzed photoinduced ligand-to-metal charge transfer (LMCT) is described. This reaction enables the preparation of carbonyl and 1, n-dicarbonyl compounds. To the best of our knowledge, this is the first example of tungsten catalyzed decarboxylative functionalization reactions.
{"title":"Tungsten promoted decarboxylative oxygenation and ring-opening <i>via</i> ligand-to-metal charge transfer.","authors":"Heng Song, Li Fang, Jiahao Wang, Xingwei Cai, Yougen Cai, Ying Li, Jia-Jia Zhao, Lei Chen, Hongxian Sun, Chen Xu","doi":"10.1039/d5cc06984j","DOIUrl":"https://doi.org/10.1039/d5cc06984j","url":null,"abstract":"<p><p>A decarboxylative oxidation and ring-opening protocol of carboxylic acids <i>via</i> tungsten-catalyzed photoinduced ligand-to-metal charge transfer (LMCT) is described. This reaction enables the preparation of carbonyl and 1, <i>n</i>-dicarbonyl compounds. To the best of our knowledge, this is the first example of tungsten catalyzed decarboxylative functionalization reactions.</p>","PeriodicalId":67,"journal":{"name":"Chemical Communications","volume":" ","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146123220","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}
The efficient and low-energy treatment of dye wastewater remains a significant challenge. Herein, a novel co-sensitized TiO2 photocatalyst (CS-TiO2) was constructed by combining ruthenium-based dye N719 with a laboratory-synthesized organic dye RA, aiming to extend the visible-light absorption range. The CS-TiO2 was subsequently embedded into poly(methyl methacrylate) micro-nano fibers via centrifugal spinning, yielding easily recyclable photocatalytic membranes. After deducting the 30% self-degradation contribution of methylene blue arising from its intrinsic photosensitizing effect, the as-prepared PMMA/CS-TiO2 membrane achieved a net MB degradation efficiency of 58.12%-significantly superior to that of single-dye sensitized counterparts. This enhanced performance is ascribed to efficient charge separation and boosted production of dominant ·OH radicals enabled by the synergistic co-sensitization effect. Notably, the membrane retained ∼80% of its initial net degradation efficiency after five consecutive cycles, demonstrating excellent reusability and structural stability. This work offers a promising approach for constructing efficient, sustainable, and recyclable photocatalytic systems for dye wastewater remediation.
{"title":"Recyclable dye-sensitized TiO<sub>2</sub> composite membranes with interfacial spectral complementarity for sustainable white-light-driven dye degradation.","authors":"Hongyang Cen, Wei Zhu, Yongqiang Li, Yajing Song, Zhenxin Xu, Pengjiang Tan, Shuo Cao, Yonglei Gao, Yi Huang","doi":"10.1039/d5ra09829g","DOIUrl":"https://doi.org/10.1039/d5ra09829g","url":null,"abstract":"<p><p>The efficient and low-energy treatment of dye wastewater remains a significant challenge. Herein, a novel co-sensitized TiO<sub>2</sub> photocatalyst (CS-TiO<sub>2</sub>) was constructed by combining ruthenium-based dye N719 with a laboratory-synthesized organic dye RA, aiming to extend the visible-light absorption range. The CS-TiO<sub>2</sub> was subsequently embedded into poly(methyl methacrylate) micro-nano fibers <i>via</i> centrifugal spinning, yielding easily recyclable photocatalytic membranes. After deducting the 30% self-degradation contribution of methylene blue arising from its intrinsic photosensitizing effect, the as-prepared PMMA/CS-TiO<sub>2</sub> membrane achieved a net MB degradation efficiency of 58.12%-significantly superior to that of single-dye sensitized counterparts. This enhanced performance is ascribed to efficient charge separation and boosted production of dominant ·OH radicals enabled by the synergistic co-sensitization effect. Notably, the membrane retained ∼80% of its initial net degradation efficiency after five consecutive cycles, demonstrating excellent reusability and structural stability. This work offers a promising approach for constructing efficient, sustainable, and recyclable photocatalytic systems for dye wastewater remediation.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":"16 8","pages":"7590-7602"},"PeriodicalIF":4.6,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12875207/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146140468","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}
Lidi Gao, Jiawen Yu, Dongsheng Zhao, Xinyu Liang, Jun Wang, Fuquan Zhao, Ming Zhao, Hongtao Chu, Shili Qin
In this work, a novel Ti-based MOF (NH2-MIL-125) bonded open-tubular (OT) column was firstly prepared via a one-step bonded growth method for capillary electrochromatography (CEC). The stationary phase was characterized by Fourier transform-infrared spectroscopy, scanning electron microscopy, X-ray diffraction spectroscopy, nitrogen adsorption-desorption isotherm measurements and zeta potential measurements. The results showed that the stationary phase exhibited a large specific surface area (1247.57 m2 g-1) with microporous and mesoporous structure and no obvious changes in the morphology/size inside and outside the column. Baseline separation of three β-adrenergic receptor blockers (Prop, Sot, and Lab), three β-adrenergic receptor agonists, and four sulfonamide antibiotics was obtained under the optimized CEC conditions with the shortest analysis time of 2.52 min and a maximum resolution of 11.52. The separation mechanisms were mainly attributed to the polarity and electrophoretic mobility of the analytes, as well as π-π interactions and hydrogen bonding interaction between the stationary phase and the analytes. A quantitative detection method for the three β-adrenergic receptor blockers in pork samples was established using the NH2-MIL-125 bonded OT column. Good linearity (R2 > 0.999) was obtained over the concentration range of 0.01-1.00 mg mL-1 with limits of detection of 0.0044-0.0084 mg mL-1 and recoveries of 90.24-106.74%. Thus, the developed method was simple, rapid and highly efficient, and could be applied for the simultaneous separation and detection of the three β-adrenergic receptor blockers in real samples.
{"title":"A MOF with high specific surface area for rapid separation and determination of β-adrenergic receptor blockers in pork by open-tubular capillary electrochromatography.","authors":"Lidi Gao, Jiawen Yu, Dongsheng Zhao, Xinyu Liang, Jun Wang, Fuquan Zhao, Ming Zhao, Hongtao Chu, Shili Qin","doi":"10.1039/d5ay01941a","DOIUrl":"https://doi.org/10.1039/d5ay01941a","url":null,"abstract":"<p><p>In this work, a novel Ti-based MOF (NH<sub>2</sub>-MIL-125) bonded open-tubular (OT) column was firstly prepared <i>via</i> a one-step bonded growth method for capillary electrochromatography (CEC). The stationary phase was characterized by Fourier transform-infrared spectroscopy, scanning electron microscopy, X-ray diffraction spectroscopy, nitrogen adsorption-desorption isotherm measurements and zeta potential measurements. The results showed that the stationary phase exhibited a large specific surface area (1247.57 m<sup>2</sup> g<sup>-1</sup>) with microporous and mesoporous structure and no obvious changes in the morphology/size inside and outside the column. Baseline separation of three β-adrenergic receptor blockers (Prop, Sot, and Lab), three β-adrenergic receptor agonists, and four sulfonamide antibiotics was obtained under the optimized CEC conditions with the shortest analysis time of 2.52 min and a maximum resolution of 11.52. The separation mechanisms were mainly attributed to the polarity and electrophoretic mobility of the analytes, as well as π-π interactions and hydrogen bonding interaction between the stationary phase and the analytes. A quantitative detection method for the three β-adrenergic receptor blockers in pork samples was established using the NH<sub>2</sub>-MIL-125 bonded OT column. Good linearity (<i>R</i><sup>2</sup> > 0.999) was obtained over the concentration range of 0.01-1.00 mg mL<sup>-1</sup> with limits of detection of 0.0044-0.0084 mg mL<sup>-1</sup> and recoveries of 90.24-106.74%. Thus, the developed method was simple, rapid and highly efficient, and could be applied for the simultaneous separation and detection of the three β-adrenergic receptor blockers in real samples.</p>","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146122992","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}
Pub Date : 2026-02-05eCollection Date: 2026-02-02DOI: 10.1039/d5ra08508j
Hafiz Ammar Bin Saeed, Noreen Sajjad, Zarfishan Zulfiqar, Zain Fatima, Muhammad Ajaz Hussain, Gulzar Muhammad, Abid Ali, Amel Y Ahmed, Maryam Kaleem
The green synthesis of metal nanoparticles (NPs) has been of growing interest, in part because it is environmentally friendly, less toxic, and uses plant-derived phytochemicals as natural reducing and stabilizing agents, providing a more sustainable approach to traditional chemical synthesis. This study reports the green synthesis of silver NPs (Ag NPs) from aqueous leaf extracts of Echinops ritro and Echinops spinosus and assesses the comparative antibacterial and photocatalytic properties. The optical band gap energies of Ag NPs grown using both plants were determined to be 2.76 eV and 2.78 eV, respectively. FTIR, SEM, and XRD analyses have identified the functional groups in the formation of polydisperse NPs and validated their size and crystalline structure. The synthesized Ag NPs-ES demonstrated the best antibacterial activity with a maximum inhibition zone (24.66 mm) against S. aureus. In comparison, the zone of inhibition (ZOI) against other strains was 24 ± 1, 21.66 ± 0.88, and 21 ± 0.57 mm for B. licheniformis, B. Subtilis, and E. coli, respectively, while Ag NPs-ES showed the same trend in the maximum ZOI against S. aureus (22.33 ± 0.33 mm), followed by B. subtilis (20.66 ± 0.66 mm), B. licheniformis (15.33 ± 0.88 mm), and E. coli (15 ± 0.57 mm). The photocatalytic degradation of methylene blue (MB) and methyl orange (MO) dyes under sunlight was more prominent with Ag NPs from E. spinosus (80% & 88%) than from E. ritro (71.2% & 74.8%), following pseudo-first-order kinetics with higher rate constants. The results supported that E. ritro and E. spinosus-capped Ag NPs are potent, environmentally friendly materials with potential applications in antibacterial formulations and wastewater treatment.
{"title":"Eco-friendly fabrication of silver nanoparticles from <i>Echinops</i> species: a comparative study of antibacterial and photocatalytic performance.","authors":"Hafiz Ammar Bin Saeed, Noreen Sajjad, Zarfishan Zulfiqar, Zain Fatima, Muhammad Ajaz Hussain, Gulzar Muhammad, Abid Ali, Amel Y Ahmed, Maryam Kaleem","doi":"10.1039/d5ra08508j","DOIUrl":"https://doi.org/10.1039/d5ra08508j","url":null,"abstract":"<p><p>The green synthesis of metal nanoparticles (NPs) has been of growing interest, in part because it is environmentally friendly, less toxic, and uses plant-derived phytochemicals as natural reducing and stabilizing agents, providing a more sustainable approach to traditional chemical synthesis. This study reports the green synthesis of silver NPs (Ag NPs) from aqueous leaf extracts of <i>Echinops ritro</i> and <i>Echinops spinosus</i> and assesses the comparative antibacterial and photocatalytic properties. The optical band gap energies of Ag NPs grown using both plants were determined to be 2.76 eV and 2.78 eV, respectively. FTIR, SEM, and XRD analyses have identified the functional groups in the formation of polydisperse NPs and validated their size and crystalline structure. The synthesized Ag NPs-ES demonstrated the best antibacterial activity with a maximum inhibition zone (24.66 mm) against <i>S. aureus</i>. In comparison, the zone of inhibition (ZOI) against other strains was 24 ± 1, 21.66 ± 0.88, and 21 ± 0.57 mm for <i>B. licheniformis</i>, <i>B. Subtilis</i>, and <i>E. coli</i>, respectively, while Ag NPs-ES showed the same trend in the maximum ZOI against <i>S. aureus</i> (22.33 ± 0.33 mm), followed by <i>B. subtilis</i> (20.66 ± 0.66 mm), <i>B. licheniformis</i> (15.33 ± 0.88 mm), and <i>E. coli</i> (15 ± 0.57 mm). The photocatalytic degradation of methylene blue (MB) and methyl orange (MO) dyes under sunlight was more prominent with Ag NPs from <i>E. spinosus</i> (80% & 88%) than from <i>E. ritro</i> (71.2% & 74.8%), following pseudo-first-order kinetics with higher rate constants. The results supported that <i>E. ritro</i> and <i>E. spinosus</i>-capped Ag NPs are potent, environmentally friendly materials with potential applications in antibacterial formulations and wastewater treatment.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":"16 8","pages":"7603-7617"},"PeriodicalIF":4.6,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12875052/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146140394","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}
Pub Date : 2026-02-05eCollection Date: 2026-02-02DOI: 10.1039/d5ra08926c
Tulsi M Poudel, Daphne E Poirier, Marybeth Hope T Banda, Eylul Ergun, Daniel Rourke, Kayode O Ojo, Ertan Agar, Maricris L Mayes, Patrick J Cappillino
Redox-mediated flow batteries (RMFBs) are a promising, emerging energy storage technology and have the potential to drastically increase the capacity of conventional redox flow batteries (RFBs) while maintaining their architectural flexibility. In these systems, a solution-phase active material is pumped between the RFB cell stack and storage tanks and is responsible for direct charge/discharge of the battery system. This material acts as a redox mediator (RM) between the electrochemical apparatus and a solid active material (SAM), which remains in the storage tanks and comprises the capacity of the system. Characteristics of the indirect electrochemical reaction between RM and SAM, which occur in the storage tank, external to the RFB stack, have so far been inferred from conventional RFB performance metrics. Herein, we report a study of this heterogeneous process that is based on spectroscopic measurements, carried out on the active materials, rather than interpretation of distal electrode processes. This provides independent information on the SAM's state-of-charge, a critical property of RMFB performance that is typically not measured directly. Further, we demonstrate that the redox reaction between the RM and the SAM, which is required for efficient operation, may be tuned by hundreds of mV, or even completely inhibited, by altering the type and concentration of supporting ions in the electrolyte. Finally, we report a periodic-DFT investigation of the vibrational spectroscopy of the SAM, which lays the groundwork for a thermodynamic framework that will be used to characterize and optimize the indirect electrochemical reaction.
{"title":"Fine-tuning the indirect electrochemical reaction in redox-mediated flow batteries.","authors":"Tulsi M Poudel, Daphne E Poirier, Marybeth Hope T Banda, Eylul Ergun, Daniel Rourke, Kayode O Ojo, Ertan Agar, Maricris L Mayes, Patrick J Cappillino","doi":"10.1039/d5ra08926c","DOIUrl":"https://doi.org/10.1039/d5ra08926c","url":null,"abstract":"<p><p>Redox-mediated flow batteries (RMFBs) are a promising, emerging energy storage technology and have the potential to drastically increase the capacity of conventional redox flow batteries (RFBs) while maintaining their architectural flexibility. In these systems, a solution-phase active material is pumped between the RFB cell stack and storage tanks and is responsible for direct charge/discharge of the battery system. This material acts as a redox mediator (RM) between the electrochemical apparatus and a solid active material (SAM), which remains in the storage tanks and comprises the capacity of the system. Characteristics of the indirect electrochemical reaction between RM and SAM, which occur in the storage tank, external to the RFB stack, have so far been inferred from conventional RFB performance metrics. Herein, we report a study of this heterogeneous process that is based on spectroscopic measurements, carried out on the active materials, rather than interpretation of distal electrode processes. This provides independent information on the SAM's state-of-charge, a critical property of RMFB performance that is typically not measured directly. Further, we demonstrate that the redox reaction between the RM and the SAM, which is required for efficient operation, may be tuned by hundreds of mV, or even completely inhibited, by altering the type and concentration of supporting ions in the electrolyte. Finally, we report a periodic-DFT investigation of the vibrational spectroscopy of the SAM, which lays the groundwork for a thermodynamic framework that will be used to characterize and optimize the indirect electrochemical reaction.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":"16 8","pages":"7344-7354"},"PeriodicalIF":4.6,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12873652/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146140401","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}
In this study, a novel type of coal-based carbon dots (CDs) was synthesized using Inner Mongolia lignite as the carbon source and H2O2 as the oxidizing agent, and it was successfully applied for the detection of Fe3+ ions. The morphology and structure of CDs were characterized using TEM, XPS and FT-IR techniques. The results revealed that the CDs exhibited a relatively regular triangular star-like morphology with an average diameter of approximately 9.21 nm. The surface was abundant in oxygen-containing functional groups, including hydroxyl and carboxyl groups. Under ultraviolet illumination, the samples exhibited bright blue fluorescence, with a fluorescence quantum yield of up to 23.49%. When the concentration of Fe3+ is within the range of 6-670 µmol L-1, a well-defined linear relationship is observed, with a detection limit of 0.123 µM. Furthermore, SiO32- acts as a fluorescence restorer in the CDs-Fe3+ system, enabling the construction of a fluorescence quenching-recovery system based on CDs, which has been successfully applied to the detection of Fe3+ in soil and vegetables samples. These novel coal-based CDs exhibit promising application potential in the environmental analysis of Fe3+ ions.
{"title":"Novel low-rank coal-based CDs for the detection of Fe<sup>3</sup>.","authors":"Wenwen Wu, Xiang Han, Siyu Zhang, Lele Li, Meili Du, Fuxin Chen","doi":"10.1039/d5ay01773d","DOIUrl":"https://doi.org/10.1039/d5ay01773d","url":null,"abstract":"<p><p>In this study, a novel type of coal-based carbon dots (CDs) was synthesized using Inner Mongolia lignite as the carbon source and H<sub>2</sub>O<sub>2</sub> as the oxidizing agent, and it was successfully applied for the detection of Fe<sup>3+</sup> ions. The morphology and structure of CDs were characterized using TEM, XPS and FT-IR techniques. The results revealed that the CDs exhibited a relatively regular triangular star-like morphology with an average diameter of approximately 9.21 nm. The surface was abundant in oxygen-containing functional groups, including hydroxyl and carboxyl groups. Under ultraviolet illumination, the samples exhibited bright blue fluorescence, with a fluorescence quantum yield of up to 23.49%. When the concentration of Fe<sup>3+</sup> is within the range of 6-670 µmol L<sup>-1</sup>, a well-defined linear relationship is observed, with a detection limit of 0.123 µM. Furthermore, SiO<sub>3</sub><sup>2-</sup> acts as a fluorescence restorer in the CDs-Fe<sup>3+</sup> system, enabling the construction of a fluorescence quenching-recovery system based on CDs, which has been successfully applied to the detection of Fe<sup>3+</sup> in soil and vegetables samples. These novel coal-based CDs exhibit promising application potential in the environmental analysis of Fe<sup>3+</sup> ions.</p>","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" ","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146123130","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}
Federico Parisi, Yingzhen Chen, Klaus Wippermann, Carsten Korte, Piotr M Kowalski, Michael Eikerling, Christian Rodenbücher
Joo and East have recently published a Comment on our article (F. Parisi et al., Phys. Chem. Chem. Phys., 2024, 26, 28037, https://doi.org/10.1039/D3CP06047K). The Comment is based on the wrong assumption that we misassigned the infrared spectrum of liquid diethylmethylammonium triflate [DEMA][TfO]. The authors incorrectly claim that our hypothesis was that the two bands are due to the NH stretch mode in two different ion-pair structural types. We clarify here that our original analysis did not invoke two separate, static ion-pair structures, but rather a continuum of dynamically evolving hydrogen-bonding environments that naturally produce a broadened, bimodal band shape. The results presented in our paper are aligned with the ones presented in the Comment. The Comment brings up the concept of Fermi resonance, which indeed gives a plausible explanation of the features seen in the experimental absorption spectra.
Joo和East最近对我们的文章发表了评论(F. Parisi et al., Phys.)。化学。化学。理论物理。, 2024, 26, 28037, https://doi.org/10.1039/D3CP06047K)。该评论基于一个错误的假设,即我们错配了液体三酸二乙基甲基铵[DEMA][TfO]的红外光谱。作者错误地声称,我们的假设是,这两个波段是由于两种不同的离子对结构类型的NH拉伸模式。我们在这里澄清,我们的原始分析并没有调用两个独立的,静态的离子对结构,而是一个动态演变的氢键环境的连续体,自然产生一个加宽的,双峰带形状。我们论文中提出的结果与评论中提出的结果一致。该评论提出了费米共振的概念,它确实对实验吸收光谱中看到的特征给出了合理的解释。
{"title":"Reply to 'Comment on \"Understanding the infrared spectrum of the protic ionic liquid [DEMA][TfO] by atomistic simulations\"' by J. Joo and A. L. L. East, <i>Phys. Chem. Chem. Phys.</i>, 2026, <b>28</b>, DOI: 10.1039/D5CP02379C.","authors":"Federico Parisi, Yingzhen Chen, Klaus Wippermann, Carsten Korte, Piotr M Kowalski, Michael Eikerling, Christian Rodenbücher","doi":"10.1039/d5cp04878h","DOIUrl":"https://doi.org/10.1039/d5cp04878h","url":null,"abstract":"<p><p>Joo and East have recently published a Comment on our article (F. Parisi <i>et al.</i>, <i>Phys. Chem. Chem. Phys.</i>, 2024, <b>26</b>, 28037, https://doi.org/10.1039/D3CP06047K). The Comment is based on the wrong assumption that we <i>misassigned the infrared spectrum of liquid diethylmethylammonium triflate [DEMA][TfO]</i>. The authors incorrectly claim that our hypothesis was that the two bands are due to the NH stretch mode in two different ion-pair structural types. We clarify here that our original analysis did not invoke two separate, static ion-pair structures, but rather a continuum of dynamically evolving hydrogen-bonding environments that naturally produce a broadened, bimodal band shape. The results presented in our paper are aligned with the ones presented in the Comment. The Comment brings up the concept of Fermi resonance, which indeed gives a plausible explanation of the features seen in the experimental absorption spectra.</p>","PeriodicalId":99,"journal":{"name":"Physical Chemistry Chemical Physics","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146123315","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}
Sarah O'Neill, Bianca Pineiro, Julianna Manson, Rishi Black, Jillian E Smith-Carpenter
Correction for 'A guanosine-containing nucleopeptide self-assembles at the Hoogsteen face to act as a peroxidase mimetic' by Sarah O'Neill et al., Chem. Commun., 2025, 61, 18633-18636, https://doi.org/10.1039/D5CC05835J.
更正Sarah O' neill等人的“含鸟苷的核肽在Hoogsteen表面自组装,充当过氧化物酶模拟物”,化学。Commun。, 2025, 61, 18633-18636, https://doi.org/10.1039/D5CC05835J。
{"title":"Correction: A guanosine-containing nucleopeptide self-assembles at the Hoogsteen face to act as a peroxidase mimetic.","authors":"Sarah O'Neill, Bianca Pineiro, Julianna Manson, Rishi Black, Jillian E Smith-Carpenter","doi":"10.1039/d6cc90031c","DOIUrl":"https://doi.org/10.1039/d6cc90031c","url":null,"abstract":"<p><p>Correction for 'A guanosine-containing nucleopeptide self-assembles at the Hoogsteen face to act as a peroxidase mimetic' by Sarah O'Neill <i>et al.</i>, <i>Chem. Commun.</i>, 2025, <b>61</b>, 18633-18636, https://doi.org/10.1039/D5CC05835J.</p>","PeriodicalId":67,"journal":{"name":"Chemical Communications","volume":" ","pages":""},"PeriodicalIF":4.2,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146123151","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}