ChemPlusChem最新文献

{"title":"Valorization of Industrial Waste Graphite Fines into Graphene Oxide-based Nanohybrids.","authors":"Mohammed Subrati, Kyriaki-Marina Lyra, Konstantinos Spyrou, Ilektra Magdalini Toliou, George Petrou, Petros Manganiaris, Aggeliki Papavasiliou, Elias Sakellis, Chrysoula P Athanasekou, Antonella Glisenti, Zili Sideratou, Fotios K Katsaros","doi":"10.1002/cplu.202400692","DOIUrl":"https://doi.org/10.1002/cplu.202400692","url":null,"abstract":"<p><p>The rapid growth of graphite market is highly coupled with the increasing demand for Li-ion grade graphite, the production of which results in significant losses of the graphitic material in the form of graphite fines. Herein, for the first time, we report an effective strategy to utilize industrial waste graphite fines through the development of graphene oxide-based nanohybrids as non-toxic and efficient antibacterial agents. To achieve this, graphene oxide (GO) was initially synthesized using industrial waste graphite fines as a graphitic precursor. Subsequently, hyperbranched polyethyleneimine (PEI), or either of its guanidinylated (GPEI) and N-sulfopropylated (SPEI) derivatives were successfully and homogenously attached onto GO, as confirmed by various characterization techniques, yielding GO-PEI, and novel GO-GPEI and GO-SPEI nanohybrids. The antibacterial activity of these nanohybrids was assessed against Gram (-) Escherichia coli and Gram (+) Staphylococcus Aureus bacteria. Both GO-GPEI and GO-SPEI were found to exhibit higher antibacterial activity, specifically against E. coli bacteria, compared to the pristine GO and the GO-PEI nanohybrid, with GO-SPEI being more active than GO-GPEI. Finally, GO-GPEI and GO-SPEI were found to exhibit low cytotoxicity against mammalian cells, signifying that they can be used as potential antibacterial agents in various applications, including those in the disinfection industry.</p>","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202400692"},"PeriodicalIF":3.0,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142816854","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}

{"title":"Covalent Functionalisation of rGO and Nanodiamonds: Complementary Versatility and Applicability of Azomethine Ylide, Nitrile Oxide and Nitrone.","authors":"Katia Martina, Silvia Tagliapietra, Federica Calsolaro, Andrei Paraschiv, Mirko Sacco, Federico Picollo, Sofia Sturari, Pietro Arpà, Lorenzo Mino, Alessandro Barge, Giancarlo Cravotto","doi":"10.1002/cplu.202400510","DOIUrl":"10.1002/cplu.202400510","url":null,"abstract":"<p><p>The existing synthetic protocols for the direct functionalization of carbon-based nanomaterials often entail limitations due to their harsh reaction conditions, which require the use of high temperatures for extended periods. This study aims to overcome these limitations by developing mild and efficient synthetic protocols around 1,3-dipolar cycloaddition. Beginning with the well-established azomethine ylide derivatization, we progress to the utilization of nitrile oxide, and of nitrone derivatives for the functionalization of reduced graphene oxide (rGO) as well as of nanodiamonds (NDs). This comparative work employs both classical heating and microwave activation with the aim of reducing reaction times and enhancing efficacy. Results demonstrate that nitrone can react at 60 °C and that the reaction temperature may be decreased to 30 °C with nitrile oxide. Excellent progress was made in reducing the large excess of dipoles typically required for derivatization. Nitrile oxide was proved to be the most efficient in terms of derivatization degree, while nitrone was the most versatile reagent, facilitating the decoration of the carbon nanolayer with disubstituted dihydroisoxazole. To accurately assess the degree of functionalization, the reaction products underwent characterization using various spectroscopic and analytical techniques. Additionally, an indirect evaluation of the reaction outcome was conducted through Fmoc deprotection and quantification.</p>","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202400510"},"PeriodicalIF":3.0,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142816852","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}

{"title":"Diffusion Coefficient Analysis by Dynamic Light Scattering Enables Determination of Critical Micelle Concentration.","authors":"Lena Nielinger, Katharina Alker, Wolf Hiller, Leonhard H Urner","doi":"10.1002/cplu.202400645","DOIUrl":"10.1002/cplu.202400645","url":null,"abstract":"<p><p>The critical micelle concentration is an important property of supramolecular detergents. Two dynamic light scattering approaches have been developed for critical micelle concentration analysis, i. e., concentration-dependent light scattering intensity analysis and diffusion coefficient analysis. Their utility as complementary tools for a reproducible determination of critical micelle concentration remains to be clarified. Herein, we address the question which of the two approaches is more suitable for obtaining reproducible critical micelle concentration values. We systematically compare both approaches in context with common detergent classes and benchmark utility by means of literature values. Our results show that the diffusion coefficient analysis delivers reproducible critical micelle concentration values in aqueous solutions. Our findings outline a roadmap to guide the critical micelle concentration analysis of detergents by dynamic light scattering in the future.</p>","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202400645"},"PeriodicalIF":3.0,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142805652","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}

{"title":"Chemically Crosslinked Alginate Hydrogel with Polyaziridine: Effects on Physicochemical Properties and Promising Applications.","authors":"Chaehoon Lee, Giacomo Fiocco, Barbara Vigani, Teresa Recca, Chiara Milanese, Chiara Delledonne, Maurizio Licchelli, Silvia Rossi, Yongjae Chung, Francesca Volpi, Maduka L Weththimuni, Marco Malagodi","doi":"10.1002/cplu.202400649","DOIUrl":"10.1002/cplu.202400649","url":null,"abstract":"<p><p>Alginate biopolymer is widely employed in many industrial fields thanks to its pleasing features of biodegradability, biocompatibility, low toxicity, and relatively low cost. The gelling process of alginate with divalent cations is fairly simple and thus it is used as a versatile biomaterial to tailor the desired mechanical and moisture properties. This study focused on developing new gel formulations to enhance the properties of calcium-alginate hydrogel (CA). The newly synthesized hydrogels, referred to as CA-CHEM gels, were chemically cross-linked with different ratios of pentaerythritol tris[3-(1-aziridinyl)propionate] (PTAP) through the reaction between the carboxylic groups of alginate and aziridines of PTAP. The reaction was successfully monitored by NMR. The new CA-CHEM gels were chemically characterized using FTIR-ATR, while SEM analysis confirmed the changes in the porosity and homogeneity of the network. Additionally, thermogravimetric analyses and mechanical properties showed improvement in degradation stability and in structural strength, compared to plain CA, with an increasing PTAP content up to 1 % w/w. Finally, the new CA-CHEM gels effectively controlled water absorption and release. In particular, CA-CHEM-1 performed as the most controlled system, making it promising for delivering aqueous cleaning solutions on water-sensitive surfaces such as a wooden historical musical instrument.</p>","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202400649"},"PeriodicalIF":3.0,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798742","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}

{"title":"Catalytic Oxidation of Kraft Lignin in a Trickle-bed Continuous Reactor.","authors":"Antonio Hernandez Mañas, Léa Vilcocq, Pascal Fongarland, Laurent Djakovitch","doi":"10.1002/cplu.202400730","DOIUrl":"https://doi.org/10.1002/cplu.202400730","url":null,"abstract":"<p><p>For the first time, the catalytic oxidation of Kraft lignin over a solid heterogeneous catalyst was studied in a continuous lab-scale trickle-bed reactor. This catalytic process is able to depolymerize Kraft lignin and produce phenolic compounds of interest such as vanillin. The impact of operating conditions such as temperature, residence time, contact time, catalyst loading and lignin concentration was evaluated. The formation of vanillin, the main phenolic compound detected in reaction products, was favored at medium temperature (200°C), short contact time (< 1 gcat.min.gfeed-1), high catalyst loading (32 g) and low lignin concentration (5 g.L-1). The vanillin productivity is 30 times higher in a continuous fixed bed reactor than in a batch reactor.</p>","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202400730"},"PeriodicalIF":3.0,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798738","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}

{"title":"Multistep Removal System of Gaseous Toluene: Adsorption, Electrochemical, and Photolytic Treatments.","authors":"Karla Verónica Bolaños-Romero, Rosa Luz López-Carbajal, Antonia Sandoval-González, Goldie Oza, Juan Manríquez Rocha, Susana Citlaly Gaucin-Gutiérrez, Issis Claudette Romero-Ibarra, Roberto Fernando Frausto-Castillo, Joaquín Rodríguez-López, Erika Bustos Bustos","doi":"10.1002/cplu.202400532","DOIUrl":"10.1002/cplu.202400532","url":null,"abstract":"<p><p>A large amount of atmospheric emissions result from various anthropogenic activities worldwide. Given the complexity of volatile organic compounds (VOCs) and their different adsorption capacities, redox potentials, and photolytic properties, an air purification system for the removal of VOCs that combines multiple physical processes was proposed in this study using toluene as an example. These processes include, in the first step, an adsorption treatment (AT) with activated carbon (AC), where toluene adsorption results from the insertion of aromatic rings (nonpolar groups) between the graphitic carbon planes, as demonstrated by the Raman spectroscopy; in the second step, electrochemical treatment (ECT) using TiO_2,nt|Ti||SS-304 electrodes applying an electric field to accelerate the oxidation of toluene through the production of free radicals (⋅OH), hydroperoxyl radicals and benzyl groups, followed by the rupture of aromatic rings to generate aliphatic compounds and the consequent mineralization to CO, CO₂, and H₂O; in the third step, photolytic treatment (PT) with a 254-nm UV lamp for toluene degradation is used, which is influenced by the addition of radicals, such as ⋅OH or ⋅O^- _2ad, to transform toluene into either benzene or phenol. The multistep system integrating AT, ECT and PT was more efficient overall (99.58 %) than the individual treatments (AT=50.29 %, ECT=44.38 %, and PT=52.71 %) as evaluated by gas chromatography with a BID detector; it showed enhanced efficiency enabled by the synergistic effects of combining multiple technologies to enhance the overall toluene degradation efficiency and flexibility. The multistage systems can be adapted to specific contamination conditions and process requirements with the generation of residual toluene, phenol, and aliphatic compounds and possible mineralization to molecules such as CO₂, CO, and H₂O. This small and portable multistep system provides a novel approach for treating outdoor and/or indoor air contaminated with toluene.</p>","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202400532"},"PeriodicalIF":3.0,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142764637","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}

{"title":"Alternating and Pulsed Current Electrolysis for Atom Transfer Radical Polymerization.","authors":"Francesco De Bon, Alexandre Vaz Simões, Armenio C Serra, Jorge F J Coelho","doi":"10.1002/cplu.202400661","DOIUrl":"10.1002/cplu.202400661","url":null,"abstract":"<p><p>This concept focuses on the application of alternating current (AC) and pulsed electrolysis in Atom Transfer Radical Polymerization (ATRP) for polymer synthesis. AC electrolysis, which oscillates between reduction and oxidation, can be tuned to increase selectivity for a specific reaction pathway, minimize side reactions, and improve product selectivity and reagent conversion. Pulsed electrolysis can also be used to sustain electrochemical reactions in ATRP. The challenges and limitations associated with AC electrolysis are discussed along with an outlook on future developments in polymer synthesis and related applications. A concise overview of recent developments in electro-organic synthesis using AC electrolysis will be provided.</p>","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202400661"},"PeriodicalIF":3.0,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142764632","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}

{"title":"Molecular Mechanism of the β₃AR Agonist Activity of a β-Blocker.","authors":"Shuang Zheng, Shuhao Zhang, Shengjie Dai, Kai Chen, Kaixuan Gao, Xiaoou Sun, Bin Lin, Xiangyu Liu","doi":"10.1002/cplu.202400288","DOIUrl":"10.1002/cplu.202400288","url":null,"abstract":"<p><p>Development of subtype-selective drugs for G protein-coupled receptors poses a significant challenge due to high similarity between subtypes, as exemplified by the three β-adrenergic receptors (βARs). The β₃AR agonists show promise for treating the overactive bladder or preterm birth, but their potential is hindered by off-target activation of β₁AR and β₂AR. Interestingly, several β-blockers, which are antagonists of the β₁ARs and β₂ARs, have been reported to exhibit agonist activity at the β₃AR. However, the molecular mechanism remains elusive. Understanding the underlying mechanism should facilitate the development of β₃AR agonists with improved selectivity and reduced off-target effects. In this work, we determined the structures of human β₃AR in complex with the endogenous agonist epinephrine or with a synthetic β₃AR agonist carazolol, which is also a high-affinity β-blocker. Structure comparison, mutagenesis studies and molecular dynamics simulations revealed that the differences on the flexibility of D^3.32 directly contribute to carazolol's distinct activities as an antagonist for the β₂AR and an agonist for the β₃AR. The process is also indirectly influenced by the extracellular loops (ECL), especially ECL1. Taken together, these results provide key guidance for development of selective β₃AR agonists, paving the way for new therapeutic opportunities.</p>","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202400288"},"PeriodicalIF":3.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141750600","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}

{"title":"Probing Self-Assembly of Ammeline in Chloroform and Aqueous Media: Interplay Between Hydrogen Bonding Diversity and Dimerization.","authors":"Silvana Carina Pamies, Nélida María Peruchena, Andre Nicolai Petelski","doi":"10.1002/cplu.202400436","DOIUrl":"10.1002/cplu.202400436","url":null,"abstract":"<p><p>Ammeline (AM) is a molecule with a very low reputation in the field of supramolecular community, but with a recently proven potential both experimentally and theoretically. In this work, dispersion-corrected density functional theory (DFT-D) computations and molecular dynamics (MD) simulations were employed to understand the aggregation mechanism of AM in chloroform and water media. Our DFT-D and MD analyses show that the most important interactions are those formed by the amine groups (-NH₂) with both the pyridine-type nitrogen atoms and the carbonyl groups (C=O). In the more polar solvent, the interactions between water molecules and the C=O group prevent the AM from forming more interactions with itself. Nevertheless, four types of dimers involving N-H ⋅ ⋅ ⋅ O interactions were found to exist in water solutions. The overlooked tetrel bond between endocyclic N and C atoms can also stabilize dimers in solution. Moreover, while most AM dimers are enthalpy-driven, our results indicate that the unique DD-AA dimer (D=donor, A=acceptor) that originates cyclic rosettes is entropy-driven.</p>","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202400436"},"PeriodicalIF":3.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141755962","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}

{"title":"Reactivity of Atomic Oxygen Radical Anions in Metal Oxide Clusters.","authors":"Xi-Guan Zhao, Yan-Xia Zhao, Sheng-Gui He","doi":"10.1002/cplu.202400085","DOIUrl":"10.1002/cplu.202400085","url":null,"abstract":"<p><p>Atomic oxygen radical anion (O⋅^-) represents an important type of reactive centre that exists in both chemical and biological systems. Gas-phase atomic clusters can be studied under isolated and well controlled conditions. Studies of O⋅^--containing clusters in the gas-phase provide a unique strategy to interpret the chemistry of O⋅^- radicals at a strictly molecular level. This review summarizes the research progresses made since 2013 for the reactivity of O⋅^- radicals in the atomically precise metal oxide clusters including negatively charged, nanosized, and neutral heteronuclear metal clusters benefitting from the development of advanced experimental techniques. New electronic and geometric factors to control the reactivity and product selectivity of O⋅^- radicals under dark and photo-irradiation conditions have been revealed. The detailed mechanisms of O⋅^- generation have been discussed for the reaction systems of nanosized and heteroatom-doped metal oxide clusters. The catalytic reactions mediated by the O⋅^- radicals in metal clusters have also been successfully established and the microscopic mechanisms about the dynamic generation and depletion of O⋅^- radicals have been clearly understood. The studies of O⋅^- containing metal oxide clusters in the gas-phase provided new insights into the chemistry of reactive oxygen species in related condensed-phase systems.</p>","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202400085"},"PeriodicalIF":3.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142003197","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}