化学最新文献

{"title":"Hydrogen-Bonded Supramolecular Liquid Crystals with Integrated Aggregation-Induced Emission and Room-Temperature Phosphorescence","authors":"Shan Li,Yudong Cao,Yunle Lu,Smruti Ranjan Sahoo,Qingli Li,Xinyan Gu,Glib Baryshnikov,Danfeng Ye,Liangliang Zhu","doi":"10.1039/d6cc05916c","DOIUrl":"https://doi.org/10.1039/d6cc05916c","url":null,"abstract":"A supramolecular hydrogen-bonding strategy converts a twisted non-mesogenic AIE luminogen into ordered smectic liquid crystals. The hydrogen-bond network acts as a conformation lock, planarizing excited states, enhancing intersystem crossing by two orders of magnitude, and activating room-temperature phosphorescence with an 8 ms lifetime.","PeriodicalId":67,"journal":{"name":"Chemical Communications","volume":"8 1","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149221825","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":"Collective intermolecular Coulombic decay beyond Coulomb.","authors":"Alan G Falkowski, Lorenz S Cederbaum","doi":"10.1063/5.0356165","DOIUrl":"https://doi.org/10.1063/5.0356165","url":null,"abstract":"<p><p>Intermolecular Coulombic decay (ICD) is a widely spread phenomenon in nature and the laboratory in which the excess energy of a donor is utilized to ionize a nearby acceptor. If the excess energy is insufficiently large to enable ICD, two (or more) donors can collectively transfer their combined excess energy to ionize the acceptor. Experiments show that this collective ICD is, surprisingly, operative in gases. Recently, it has been demonstrated that standard ICD can take place efficiently at large distances between the donors and acceptors due to retardation. Here, we derive the theory of collective ICD including retardation. Quantum electrodynamics perturbation theory is used, and it is shown that the theory can be substantially simplified and the process made more amenable to interpretation by introducing two-body interaction potentials that include retardation. Explicit formulas for the rate of collective ICD are derived and interpreted by expressing the rate in terms of measurable quantities and geometric factors. It is demonstrated that the change in the permanent dipole moments of the species upon excitation is a relevant ingredient in collective ICD.</p>","PeriodicalId":15313,"journal":{"name":"Journal of Chemical Physics","volume":"165 15","pages":""},"PeriodicalIF":3.7,"publicationDate":"2026-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149220222","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":"Nickel-Catalyzed Enantioselective Carbo-Carbonylation of Alkenes Using Formic Acid as a CO Surrogate: Access to Oxindoles Bearing Chiral Quaternary Carbon","authors":"Krishnamoorthy Kathirvel,Govindasamy Sekar","doi":"10.1021/acs.orglett.6c04269","DOIUrl":"https://doi.org/10.1021/acs.orglett.6c04269","url":null,"abstract":"Carbonylation reactions typically rely on toxic carbon monoxide gas, often under pressurized conditions. Herein, we report an enantioselective nickel-catalyzed carbonylative difunctionalization of activated olefins using formic acid as a safe and operationally simple CO surrogate under mild conditions. The reaction employs a chiral phosphine-based ferrocene ligand to furnish ester-functionalized oxindoles bearing stereogenic quaternary carbon centers in high yields and enantioselectivities. Isotopic-labeling and XPS studies support in situ CO generation and trapping by an alkyl-nickel intermediate.","PeriodicalId":54,"journal":{"name":"Organic Letters","volume":"16 1","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149221773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polymerization-Induced Self-Stabilized High Internal Phase Emulsions via Interfacial Poly(thioacetal) Formation","authors":"Chuanzhi Mo,&nbsp;Chengcheng Hu,&nbsp;Kangle Yan,&nbsp;Wangmao Tian,&nbsp;Yan Gao,&nbsp;Jie Xiang,&nbsp;Junjie Xu,&nbsp;Yu Jin,&nbsp;Baoxia Wang,&nbsp;Liang Yuan","doi":"10.1021/acsmacrolett.6c00374","DOIUrl":"10.1021/acsmacrolett.6c00374","url":null,"abstract":"<p>A polymerization-induced self-stabilization strategyis reportedfor the fabrication of degradable polymer foams without external surfactantsor particulate stabilizers. Specifically, interfacial polycondensationbetween glyoxal and 1,6-hexanedithiol generates amphiphilic oligomersin situ, which spontaneously adsorb at the oil–water interfaceand stabilize high internal phase emulsions (HIPEs). Subsequent curingand cross-linking afford interconnected hydrophobic foams with tunableporous structures and mechanical properties. The resulting materialsexhibit efficient separation of organic solvents from water, facilitatingrecovery and reuse. Moreover, incorporation of glyoxylic acid as acomonomer tailors surface wettability, enabling effective adsorptionof Cu²⁺ from aqueous solutions. Notably, the foams exhibitoxidative degradability under mild H₂O₂ treatment,underscoring their environmental benignity. This work establishes“polymerization-induced self-stabilization” as a newstrategy for constructing surfactant-free, degradable foams templatedby HIPEs with demonstrated applications in the fields of separationand adsorption.</p>","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"15 10","pages":"1459–1467"},"PeriodicalIF":4.9,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149013699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Repurposing Diels–Alder Chemistry to Access Low-Strain Monomers for Chemically Recyclable ROMP Polymers","authors":"Tarek Ibrahim,&nbsp;Md Aminur Rahman,&nbsp;Monica Kaczynski,&nbsp;Coogan Cardella,&nbsp;Hao Sun","doi":"10.1021/acsmacrolett.6c00457","DOIUrl":"10.1021/acsmacrolett.6c00457","url":null,"abstract":"<p>Diels–Alderreaction has been widely employedto accesshighly strained cyclic olefin monomers for efficient ring-openingmetathesis polymerization (ROMP). However, the high ring strain energies(RSEs &gt; 15 kcal/mol) of these traditional Diels–Alder monomers,while promoting efficient polymerization, compromise the depolymerizabilityof the resulting polymers, thereby limiting their chemical recyclability.Herein, we report a class of low-strain Diels–Alder monomersbased on <em>trans</em>-succinimide-fused cyclohexenes (<em>t</em>SICHs), synthesized from readily available feedstocks,fumaric acid and 3-sulfolene. The relatively low RSEs of the <em>t</em>SICH monomers (6.1–6.2 kcal/mol) enable both efficientROMP and ring-closing metathesis depolymerization (RCMD) through concentration-controlledmetathesis equilibrium. All <em>t</em>SICH monomers achievedhigh conversions (&gt;91%) during ROMP at an initial monomer concentrationof 5 M, yielding polymers with high molecular weights (&gt;100 kDa).Moreover, near-quantitative monomer regeneration (&gt;95%) was achievedvia RCMD at room temperature with an olefin concentration of 0.2 M.Critically, the resulting polymers exhibit highly tunable thermomechanicalproperties, affording a broad range of glass transition temperatures(30–78 °C) and tensile strains at break (3–550%).Overall, this work provides a new monomer design strategy that unlocksaccess to chemically recyclable polymers from Diels–Alder-derivedROMP monomers.</p>","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"15 10","pages":"1594–1601"},"PeriodicalIF":4.9,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149013711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of N-Glycans Released from Glycosylated RNAs","authors":"Khairul Islam Khan,&nbsp;Liqing He,&nbsp;Lexiao Jin,&nbsp;Eugene G. Mueller,&nbsp;Craig J. McClain,&nbsp;Xiang Zhang","doi":"10.1021/acs.analchem.6c03851","DOIUrl":"10.1021/acs.analchem.6c03851","url":null,"abstract":"<p>GlycosylatedRNAs (glycoRNAs) are involved in immune response,cellular function, gene regulation, and disease development. We reporta liquid chromatography–mass spectrometry (LC-MS) method toanalyze glycans released from glycoRNAs. The developed method includesextracting RNA from mouse liver using TRIzol, digesting proteins withproteinase K under denaturing conditions, re-extracting RNA usingTRIzol, releasing <em>N</em>-glycans by enzymatic digestion,enriching glycans by solid-phase extraction, and analyzing glycansby LC-MS. The method was optimized to detect low-abundance <em>N</em>-glycans from a purchased mixture of <em>N</em>-glycan standards, and 65 glycans were identified. We then appliedthe method to analyze the glycans released from the glycoRNAs in mouseliver and identified 244 <em>N</em>-glycans from triplicateanalyses. We also detected 40 significantly changed <em>N</em>-glycans in the livers of 32-week-old female and male KvB2 mice.This study establishes a simple and efficient technique for characterizing <em>N</em>-glycans in glycoRNAs and paves the way for future studiesto understand the function of glycoRNAs.</p>","PeriodicalId":27,"journal":{"name":"Analytical Chemistry","volume":"98 41","pages":"29588–29595"},"PeriodicalIF":7.3,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149019603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultrasensitive ppt-Level Detection of Perfluorooctanoic Acid (PFOA) via a Hybrid Nanozyme, Fe3O4@MWCNTs, with Enhanced Peroxidase-Like Activity","authors":"Pyone Pyone Chit,&nbsp;Khin Moe Lwin,&nbsp;Jungon Yu,&nbsp;Jaehan Lee,&nbsp;Younghoon Cho,&nbsp;Sangil Kim,&nbsp;Kyunghoon Kim","doi":"10.1021/acs.analchem.6c02884","DOIUrl":"10.1021/acs.analchem.6c02884","url":null,"abstract":"<p>Increasing concerns over perfluorooctanoicacid (PFOA),a representativeper- and polyfluoroalkyl substance (PFAS) often referred to as “foreverchemicals”, underscore the urgent need for simple, rapid, andsensitive detection strategies for water monitoring. Herein, we reportan ultrasensitive colorimetric sensing platform for monitoring tracelevels of PFOA in environmental water using a highly efficient hybridnanozyme, Fe₃O₄@MWCNTs. UV–vis absorbanceanalysis confirmed that the nanozyme composite effectively catalyzesthe oxidation of chromogenic substrates, such as 3,3′,5,5′-tetramethylbenzidine(TMB), exhibiting a characteristic blue color in the presence of hydrogenperoxide (H₂O₂). Upon exposure to PFOA, theactive sites on the nanozyme interface were blocked by PFOA, suppressingTMB oxidation and resulting in a clear “Turn-off” opticalresponse. This sensing platform enabled quantitative detection ofultralow concentrations of PFOA, ranging from 10 to 1,000 ng/L, witha limit of detection (LOD) of 3.12 ng/L. This work provides a cost-effective,rapid, and practical approach for monitoring environmentally relevantPFOA concentrations in water.</p>","PeriodicalId":27,"journal":{"name":"Analytical Chemistry","volume":"98 41","pages":"29515–29528"},"PeriodicalIF":7.3,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149049913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced Photocatalytic H2O2 Production over CuO@g-C3N4 Heterojunctions: Interfacial Effects with DFT Insights","authors":"Chunling Lin,&nbsp;Xinna Wei,&nbsp;Dan Xue,&nbsp;Zhen Zhang,&nbsp;Yaokang Qu","doi":"10.1021/acs.langmuir.6c04643","DOIUrl":"10.1021/acs.langmuir.6c04643","url":null,"abstract":"<p>Photocatalytic H₂O₂ productionoffers a promisingsunlight-driven pathway toward sustainable oxidant synthesis, butits performance is constrained by slow interfacial redox kinetics,insufficient proton availability, and rapid recombination of photoinducedcarriers. Herein, g-C₃N₄ was prepared by thermallycalcining melamine and ammonium fluoride at equal mass, and CuO@g-C₃N₄ composites were subsequently constructed viaultrasound-assisted dispersion and hydrothermal treatment. The morphology,phase structure, surface chemistry, optical response, charge-transportbehavior, carrier lifetime, and electronic structure were investigatedby SEM-EDS, XRD, XPS, BET, UV–vis DRS, PL, photoelectrochemicalmeasurements, TPV, and DFT simulations. Benefiting from optimizedinterfacial electronic interaction, the 30% CuO@g-C₃N₄ composite delivered H₂O₂ generationproductivity reaching 2120 μmol g^–1 h^–1 in air using a water/isopropanol mixed solvent (9:1,v/v), 3.66 times the value for pristine soft-templated g-C₃N₄. Under pure O₂, the productivity furtherincreased to 3700 μmol g^–1 h^–1 with cycling durability. PL, EIS, and TPV analyses confirm thatCuO incorporation suppresses charge recombination, promotes carriertransport, and extends the carrier lifetime from 414 to 7117 μs.Combined evidence from XPS, band-structure analysis, photoelectrochemicalmeasurements, reactive-species quenching, DMPO-trapping EPR spectroscopy,and DFT calculations reveals that interfacial chemical bonding constructsa type-II heterojunction, enabling directional charge migration andstabilizing •O₂^– intermediatesfor a successive one-electron ORR pathway toward H₂O₂ evolution. Overall, this study provides mechanistic insightinto interfacial charge regulation in CuO@g-C₃N₄ heterojunctions and offers guidance for the rational developmentof efficient photocatalysts.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"42 41","pages":"31035–31051"},"PeriodicalIF":4.4,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149091896","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":"Machine-Learning-Driven Dual-Mode Immunoassay Based on Nanobody and Natural Fluorescent Probe for Ultrasensitive Quantification of Pseudomonas aeruginosa","authors":"Mengnan Wang,&nbsp;Guangsheng Ge,&nbsp;Xueyi Fan,&nbsp;Kai Zheng,&nbsp;Yuxin Miao,&nbsp;Qing Yao,&nbsp;Min Ma,&nbsp;Jianlong Wang,&nbsp;Yanru Wang","doi":"10.1021/acs.analchem.6c04879","DOIUrl":"10.1021/acs.analchem.6c04879","url":null,"abstract":"<p><em>Pseudomonas aeruginosa</em> is a Gram-negativeopportunisticbacterial pathogen posing severe threat to environmental safety andhuman health. To achieve rapid and accurate detection, we developeda nanobody-based colorimetric-fluorescent dual-mode sandwich immunosensorusing natural fluorescent probe and further integrated machine learningto enhance the signal readout and improve detection sensitivity. Here,specific nanobodies toward <em>P. aeruginosa</em> were successfullydeveloped for the first time by biopanning against an immune phage-displayednanobody library. Natural fluorescent quinine, which possesses intrinsicfluorescence and undergoes fluorescence quenching via an internalquenching effect, was employed as the fluorescent probe. With thebaseline LODs obtained by direct fitting of the raw optical signals(9.005 × 10⁵ CFU/mL for colorimetry and 3.02 ×10³ CFU/mL for fluorescence), an XGBoost model was introducedand further reduces the LOD to 3.269 × 10³ CFU/mLand 3.96 × 10² CFU/mL, achieving a 275-fold and 7.6-foldimprovement in sensitivity, respectively. Furthermore, following abrief pre-enrichment, this method enables detection of <em>P. aeruginosa</em> at concentrations as low as 10 CFU/mL. Recoveriesin water samples ranged from 81.47% to 119.47%, with a coefficientof variation below 8.44%, showing good agreement with machine learningpredictions (<em>R</em>² = 0.957). No cross-reactivitywas observed with closely related or heterologous bacteria. This methodprovides a technical approach for the precise quantitative monitoringof <em>P. aeruginosa</em> in complex environments.</p>","PeriodicalId":27,"journal":{"name":"Analytical Chemistry","volume":"98 41","pages":"29700–29712"},"PeriodicalIF":7.3,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149091909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Scalable Membrane-Based Lithium-Ion Sieve Sorbent for Selective Lithium Extraction from Brines","authors":"Ana Ivanković,&nbsp;Adrien Comès,&nbsp;Martin Stockhausen,&nbsp;Justyna Florek,&nbsp;Heinz Ragossnig,&nbsp;Cana Khalouche,&nbsp;Thilo Hofmann,&nbsp;Freddy Kleitz,&nbsp;Christian M. Pichler","doi":"10.1021/acs.langmuir.6c04005","DOIUrl":"10.1021/acs.langmuir.6c04005","url":null,"abstract":"<p>The escalating global demand for lithium, driven by therapid growthof production of electric vehicles and portable electronics, requiresthe development of selective and scalable extraction technologiescapable of recovering lithium from complex liquid resources such asgeothermal-, oilfield-, or low-grade salar brines. This study presentsthe development and characterization of a novel composite membraneadsorbent based on a monoclinic β-Li₂TiO₃ (LTO) lithium-ion sieve embedded within a poly(vinyl chloride) (PVC)and silica (SiO₂) matrix. The incorporation of SiO₂ as a structural component enhances mechanical stability,processability, and wettability of the membrane enabling fabricationvia industrially scalable extrusion and calendaring techniques andpromoting contact of the Li-bearing brine with LTO particles insidethe pore system of the membrane. Three membrane compositions withvarying SiO₂:LTO ratios (50:50, 40:60 and 30:70 wt %) weresystematically investigated. Among the investigated compositions,the 40% SiO₂-60% LTO membrane achieved the highest equilibriumadsorption capacity of approximately 37 mg Li⁺ g^–1 HTO at 45 °C from a dilute feed solution (<em>C</em>₀ = 100 mg L^–1), consistent with endothermic,chemisorption-controlled Li⁺/H⁺ exchange kineticsbest described by the pseudo-second-order model. Selectivity evaluationin a mixed-cation solution simulating geothermal brine compositionyielded a Li⁺ distribution coefficient (<em>K</em>_d) of 304 mL g^–1, with separation factorsof 12 over Na⁺ and Mg²⁺, and 8 over K⁺. The membrane retained stable adsorption capacity over several consecutiveadsorption–desorption cycles, confirming good chemical andstructural stability. These results demonstrate the potential of PVC/SiO₂/LTO composite membranes as a promising, cost-effective, andindustrially scalable platform for selective lithium recovery fromcomplex brines.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"42 41","pages":"30788–30799"},"PeriodicalIF":4.4,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149091954","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}