The Royal Society of Chemistry最新文献

{"title":"A review of ultraviolet filters and their impact on aquatic environments.","authors":"Garett J Grant, Henry W Lim, Tasneem F Mohammad","doi":"10.1007/s43630-024-00674-8","DOIUrl":"https://doi.org/10.1007/s43630-024-00674-8","url":null,"abstract":"<p><p>Numerous anthropogenic ultraviolet filters (UVF) have been detected in aquatic environments and concerns have arisen regarding their potential impacts on aquatic organisms. This manuscript reviews the environmental concentrations and potential toxicity of various UVF. The highest concentrations of UVF are typically observed near frequently visited recreational areas and during peak water-activity periods, which suggests that sunscreen application correlates with noticeable alterations in UVF concentrations. Aquatic concentrations of certain filters have sporadically exceeded 10 μg/L, although most measurements remain below 1 µg/L, which is below commonly reported toxicity levels. UVF have also been detected in aquatic organisms, typically ranging from nondetectable levels to a few hundred ng/g, depending on the species. The toxic effects from UVF, such as coral bleaching and diminished growth, have been observed in laboratory settings, however, toxicity tends to manifest only at significantly higher levels than what is typically detected in aquatic environments. Further research is imperative to provide consumers with improved guidance on selecting sunscreen containing UVF that poses the least environmental risk.</p>","PeriodicalId":98,"journal":{"name":"Photochemical & Photobiological Sciences","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862609","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":"Magnetic microwire rheometer reveals differences in hydrogel degradation <i>via</i> disulfide reducing agents.","authors":"Margaret Braunreuther, Justin Arenhoevel, Raju Bej, Cody Moose, Marcus A Mall, Rainer Haag, Gerald G Fuller","doi":"10.1039/d4sm01118j","DOIUrl":"https://doi.org/10.1039/d4sm01118j","url":null,"abstract":"<p><p>Mucus is composed of a complex network of mucin polymers connected by disulfide bonds. In muco-obstructive diseases, an increase in mucin disulfide crosslinks contributes to pathologic mucus formation, characterized by an increase in mucus viscosity and stiffness. Reducing agents that break down the disulfide bonds between mucins can be used to treat pathologic mucus and restore healthy mucus flow properties. Here, we compare three reducing agents <i>via</i> a rheological assay. A mucus-mimetic disulfide-crosslinked hyaluronic acid hydrogel was treated with thiolated dendritic polyglycerol sulfate (dPGS-SH), <i>N</i>-acetylcysteine (NAC), or dithiothreitol (DTT). A magnetic microwire rheometer was used to track the rheology of the hydrogel over time as the treatment degraded the sample. This nondestructive and minimally invasive technique reveals differences in the degradation mechanism between these reducing agents, with potential implications for drug delivery and the treatment of muco-obstructive diseases.</p>","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862612","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":"Au nanoparticle-modified hollow carbon spheres as an advanced electrochemical sensing platform for effective detection of homocysteine in human serum.","authors":"Na Li, Yan Zhang, Dongyu Zhang, Xiaoli Zhang, Ning Wei, Xiuhui Liu","doi":"10.1039/d4ay01766h","DOIUrl":"https://doi.org/10.1039/d4ay01766h","url":null,"abstract":"<p><p>It is widely known that homocysteine (Hcy) is associated with the pathogenesis of many clinical diseases, and its quantitative detection can help early treatment of related diseases. The selection of materials with excellent properties is important for the construction of electrochemical sensing platforms and quantitative detection of Hcy. In this study, two nanocomposites, Au nanoparticles/hollow carbon spheres (AuNPs@HCS) and Au nanoparticles/solid carbon spheres (AuNPs@SCS), were prepared first. Then their morphology, structure and electrochemical behavior were investigated. And the comparison found that the HCSs have a large electroactive surface area and outstanding conductivity. Thanks to the catalytic properties of AuNPs and the synergistic effect of HCSs, AuNPs@HCS/GCE showed excellent electrochemical sensing performance for a wide range of Hcy concentrations with a detection limit down to 4.44 nM (S/N = 3). Moreover, the electrochemical mechanism of Hcy on Au@HCS/GCE is discussed in detail. Finally, in the actual serum sample assay, the sensor is used to detect Hcy directly and the recovery rate is satisfactory. This work may provide a valid method for the quantitative determination of Hcy in the future.</p>","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862553","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":"Bismuth nanoparticles embedded in carbon fibers as flexible and free-standing anodes for efficient sodium ion batteries†","authors":"Yang Cao, Shiwei Wei, Huifang Zhang, Yong Yan, Zhiling Peng and Heming Zhao","doi":"10.1039/D4RA07887J","DOIUrl":"https://doi.org/10.1039/D4RA07887J","url":null,"abstract":"<p >Metallic bismuth is a promising anode electrode material for sodium ion batteries due to its high theoretical specific capacity. However, the formation of Na<small>₃</small>Bi during the reaction process brings about significant volume changes and structural collapse of the electrode, resulting in the destruction of structures and a decrease in the cycling stability of sodium ion batteries. In this study, bismuth nanoparticles embedded in carbon fibers (Bi/CF) through a facile approach of electrospinning and calcination. Bi nanoparticles with diameters of approximately 20 nm were homogeneously dispersed in the carbon fibers, as confirmed by relevant morphological and structural features. The carbon fiber substrate can serve as a flexible and free-standing electrode, forming a conductive network to accelerate electron transport and ion diffusion. In light of this, Bi/CF anodes exhibit a high reversible capacity (376.6 mA h g<small>⁻¹</small> at 0.1 A g<small>⁻¹</small>) and long-term cycle stability (only attenuates 0.12% in each cycle after 2000 times). This work provides a convenient and effective strategy for the synthesis of flexible and free-standing anodes for high-performance sodium ion batteries.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 54","pages":" 39921-39926"},"PeriodicalIF":3.9,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ra/d4ra07887j?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844628","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":"Bio-inspired anti-swelling amyloid-fiber lysozyme adhesive for rapid wound closure and hemostasis.","authors":"Tingwu Liu, Zilin Wang, Xu Zhang, Donghua Xu, Qiuyan Yan, Yuanwei Chen, Shifang Luan","doi":"10.1039/d4bm01494d","DOIUrl":"https://doi.org/10.1039/d4bm01494d","url":null,"abstract":"<p><p>Instant adhesion to wet biological surfaces and reduced swelling of tissue adhesives are crucial for rapid wound closure and hemostasis. However, previous strategies to reduce swelling were always accompanied by a decrease in the tissue bonding strength of the adhesive. Moreover, the irreducibility of the covalent bonds in currently reported adhesives results in the adhesives losing their tissue adhesive ability. To tackle the challenge, a superior anti-swelling coacervate adhesive possessing fast self-healing properties through physical interactions (electrostatic interactions, hydrogen bonding) and chemical crosslinking (Schiff base reaction) was obtained with aldehyde-modified γ-PGA (γ-PGA-CHO), a natural lysozyme (LZM) and an amyloid fiber reduced lysozyme (RLZM). The instant shear adhesion strength and burst pressure tolerance of the adhesive on wet pig intestine reached 50.8 kPa (2.6 times that of CA glue) and 142.5 mmHg (5.9 times that of CA glue), and it maintained an adhesion strength of 37.4 kPa after exposure to the physical environment for 12 h and the swelling rate was only 34.0% underwater. The <i>in vitro</i> and <i>in vivo</i> experiments provided the coacervate adhesive with potential applicability for emergency rescue and wound care scenarios.</p>","PeriodicalId":65,"journal":{"name":"Biomaterials Science","volume":" ","pages":""},"PeriodicalIF":5.8,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Expression of hyperconjugative stereoelectronic interactions in borazines.","authors":"Vivek Chandrakant Wakchaure, Jacopo Dosso, Martina Crosta, Hanspeter Kählig, Benjamin D Ward, Davide Bonifazi","doi":"10.1039/d4cc05188b","DOIUrl":"https://doi.org/10.1039/d4cc05188b","url":null,"abstract":"<p><p>This paper discusses hyperconjugative stereoelectronic effects in borazines. A series of alkyl-substituted borazines were synthesized and analysed by NMR spectroscopy and X-ray diffraction. Supported by NBO analyses, the significant decreases in ¹<i>J</i>_CH coupling constant for the CH groups adjacent to the boron atoms are consistent with the presence of and interactions. These interactions lower the electrophilicity of boron atoms, enhancing moisture stability and establishing these molecules as valuable scaffolds in synthetic chemistry and materials science.</p>","PeriodicalId":67,"journal":{"name":"Chemical Communications","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851728","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":"Optimizing the charge transport in redox-active gels: a computational study.","authors":"A V Sergeev, V Yu Rudyak, R A Samodelkin, E Yu Kozhunova, A V Chertovich","doi":"10.1039/d4sm01199f","DOIUrl":"https://doi.org/10.1039/d4sm01199f","url":null,"abstract":"<p><p>Redox-active polymer gels are promising materials for various applications, such as energy conversion and storage systems, organic electronics, soft-robotics, sensors and others. This is in part due to the remarkable structural tunability of these materials. The gel may adopt different conformations depending on the crosslinking density, solvent temperature and other conditions. These parameters affect its behavior, including the dynamics of the charge transport between the redox groups grafted to the polymer subchains, which is of utmost importance for electrochemical applications. Here, we employed coarse-grained molecular dynamics simulation to investigate the impact of crosslinking, redox group content and solvent quality on both subchain mobility and charge transport speed. In particular, unexpected behavior of the system under the theta-solvent condition was found and analyzed. The obtained results provide useful guidelines to facilitate the best conditions for enhanced \"redox induced\" conductivity in polymer gels, which would help the development of redox-flow batteries and other electrochemical devices.</p>","PeriodicalId":103,"journal":{"name":"Soft Matter","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851747","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":"Desorption of pharmaceutical hydrochlorides from transition metal oxide nanoparticles – investigation by capillary electrophoresis","authors":"Eman T. Elmorsi and Edward P. C. Lai","doi":"10.1039/D4RA07081J","DOIUrl":"https://doi.org/10.1039/D4RA07081J","url":null,"abstract":"<p >The binding affinity of pharmaceutical hydrochlorides onto transition metal oxide nanoparticles (TMONPs) was investigated through a consecutive process of adsorption and desorption. Mexiletine (MEX) was chosen as a model pharmaceutical hydrochloride that bound onto TMONPs' surface through electrostatic interactions and coordination bonding. Response surface methodology was applied for their optimal separation by capillary electrophoresis to achieve accurate quantitation. Linear and quadratic regressions were applied to model peak resolution and migration times. The response surface methodology was next applied to investigate the maximum desorption percentages of mexiletine (MEX) from the surface of TiO<small>₂</small> and Co<small>₃</small>O<small>₄</small> nanoparticles. ANOVA indicated a positive correlation between the MEX desorption results with pH, metformin (MET) competitive desorption agent concentration, Na<small>₂</small>HPO<small>₄</small> concentration (hence ionic strength), and Na<small>₂</small>S<small>₂</small>O<small>₅</small> reducing agent concentration. The MEX desorption increased from TiO<small>₂</small> (46 ± 1%) to Co<small>₃</small>O<small>₄</small> (63 ± 1%), suggesting a stronger binding interaction between MEX and TiO<small>₂</small> nanoparticles. TiO<small>₂</small> exhibited the order of pH &gt; [MET] &gt; [Na<small>₂</small>HPO<small>₄</small>] &gt; [Na<small>₂</small>S<small>₂</small>O<small>₅</small>]; Co<small>₃</small>O<small>₄</small> exhibited the order [Na<small>₂</small>HPO<small>₄</small>] &gt; pH &gt; [MET] &gt; [Na<small>₂</small>S<small>₂</small>O<small>₅</small>]. This novel finding demonstrates the potential of TMONPs for use as efficient adsorbents to remove pharmaceutical compounds that accidently enter environmental water sources, with feasible regeneration.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 54","pages":" 39890-39901"},"PeriodicalIF":3.9,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ra/d4ra07081j?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844625","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":"Thermogravimetric analysis of commercial tungsten molecular precursors for vapor phase deposition processes†","authors":"Taylor M. Currie, Terrick McNealy-James, S. Novia Berriel, Konstantin Preradovic, Alfred P. Sattelberger, Parag Banerjee and Titel Jurca","doi":"10.1039/D4RA07284G","DOIUrl":"https://doi.org/10.1039/D4RA07284G","url":null,"abstract":"<p >Thin films and coatings based on Group 6 metal tungsten (W) have garnered intense interest for applications including catalysis, lubrication, and solar energy. Due to its selectivity and conformality, atomic layer deposition (ALD) has emerged as a key route towards oxides, dichalcogenides, and elemental metal films of W. A key component of the ALD process is the appropriate selection of molecular precursors. Thermogravimetric analysis (TGA) is the primary sorting criterion for precursor suitability and helps delineate probable ALD temperature windows, sublimation/vaporization kinetics, and parameters of decomposition. Currently, a majority of the W materials growth literature is traced to a grouping of commercially available volatile molecular precursors. However, no comprehensive thermochemical analysis exists for all of these precursors, hampering a meaningful direct comparison. Herein, we present an extensive thermogravimetric analysis and direct comparison of commercial volatile W molecular precursors. We report probable ALD temperature windows, enthalpies of sublimation (Δ<em>H</em><small>_sub</small>), activation energies (<em>E</em><small>_a</small>), and evaluate thermal stress. Our findings highlight several commercial precursors yet to be reported for ALD growth, but featuring thermochemical properties falling within our suitable observed parametric ranges indicative of potential/viable deposition processes.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 54","pages":" 39867-39873"},"PeriodicalIF":3.9,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ra/d4ra07284g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142859397","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":"A simple and stable dual-emission fluorescent system based on R6G/Eu-MOF for the rapid and sensitive determination of orientin.","authors":"Huifeng Xu, Weihua Huang, Rui Pan, Ronglin Chen, Lili Wang, Yun Yu, Xihai Li, Xi Zhu","doi":"10.1039/d4ay01610f","DOIUrl":"https://doi.org/10.1039/d4ay01610f","url":null,"abstract":"<p><p>A stable dual-emission fluorescent system, R6G/Eu-MOF, was obtained by simple mixing Eu-MOF with fluorescent rhodamine 6G (R6G). This system not only achieved robust dual luminescence performance at 430 nm (Eu-MOF) and 555 nm (R6G) under single-wavelength excitation, but also endowed it with significantly improved fluorescence stability. Orientin (OT), a bioactive traditional Chinese medicine (TCM) component, was found to efficiently quench the dual fluorescent emissions <i>via</i> the synergistic effect of dynamic quenching, photo-induced electron transfer and molecular interactions. Therefore, a rapid fluorescent assay for OT was developed based on the variations in fluorescence signals at 430 nm and 555 nm, as well as the alterations in the ratio between these two signals. This method can achieve highly sensitive determination of OT in the linear range of 1.1-220 μM, with a LOD of 0.26 μM at 430 nm and 0.16 μM at 555 nm (3<i>σ</i>/<i>N</i>). The R6G/Eu-MOF hybrid exhibits significantly lower detection limits and a broader linear range for OT than either R6G or Eu-MOF alone. This work presents a simple strategy to improve the water stability of Eu-MOF and also provides a rapid analysis of small molecule drugs using a fluorescence approach based on a dual-emission MOF hybrid system.</p>","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851682","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}