近期热点文章

Origin and Hysteresis of Lithium Compositional Spatiodynamics within Battery Primary Particles J. Lim, Y. Li, D. H. Alsem, H. So, S. C. Lee, P. Bai, D. A. Cogswell, X. Liu, N. Jin, Y.-s. Yu, N. J. Salmon, D. A. Shapiro, M. Z. Bazant, T. Tyliszczak, W. C. Chueh Science 2016, 353, 566. 采用原位X射线成像技术研究锂嵌入／脱出LixFePO4过程,发现提高锂嵌入速度可抑制颗粒内部相分离和降低机械张力,有利于提高材料的循环性能,但锂脱出过程则情况相反.     

近期热点文章

High-Performance Rh2P Electrocatalyst for Efficient Water Splitting H. Duan, D. Li, Y. Tang, Y. He, S. Ji, R. Wang, H. Lv, P. P. Lopes, A. P. Paulikas, H. Li, S. X. Mao, C. Wang, N. M. Markovic, J. Li, V. R. Stamenkovic, Y. Li J. Am. Chem. Soc. DOI: 10.1021/jacs.7b01376 通过溶剂热方法合成Ru2P/C催化剂,P组分在表面富集,对氢析出反应（HER）与氧析出反应（OER）具有优异的催化活性.     

INSTRUCTION TO CONTRIBUTORS

1.CCLisamonthlyjournal,launchedbytheChineseChemicalSociety.CCLwillpublishpreliminaryaccountsinthewholefieldofchemistry,satisfyingarealandurgentneedforthedisseminationofresearchresults,especiallyhottopics.Inaway,ithasbecomeashowwindowofimportantchemicalliteratureofChina.Forthispurpose,articlesinCCLareonlywritteninEnglish.2.CCLdoesnotacceptarticlespreviouslypublishedorscheduledtObepublished.AfterpublicationofthecommunicationinCCL,itcanbeexpandedtoafullpaperandpublishedelsewhere.3.Authors…     

近期热点文章

正Designing Air-Stable O3-Type Cathode Materials by Combined Structure Modulation for Na-Ion Batteries H.-R.Yao,P.-F.Wang,Y.Gong,J.Zhang,X.Yu,L.Gu,C.Ou Yang,Y.-X.Yin,E.Hu,X.-Q.Yang,E.Stavitski,Y.-G.Guo,L.-J.Wan J.Am.Chem.Soc.DOI:10.1021/jacs.7b05176通过减小储钠层的层间距并同时提高过渡金属离     

近期热点文章

正关键词:机器学习·CO_2还原·Cu基催化剂Y. Guo, X. R. He, Y. M. Su, Y. H. Dai, M. C. Xie, S.L. Yang, J. W. Chen, K. Wang, D. Zhou, C. Wang,Machine-Learning-Guided Discovery and Optimization of Additives in Preparing Cu Catalysts for CO2Reduction, J. Am. Chem. Soc., 2021, 143(15):5755-5762.厦门大学汪骋教授与周达副教授通过"实验测试→机器学习分析→预测和重新设计"三个迭代周期,     

近期热点文章

正关键词:富镍层状单晶材料·可逆层间滑移和裂缝Y. Bi, J. Tao, Y. Wu, L. Li, Y. Xu, E. Hu, B. Wu, J.Hu, C. Wang, J. G. Zhang, Y. Qi, J. Xiao, Reversible Planar Gliding and Microcracking in a Single-Crystalline Ni-Rich Cathode, Science, 2020, 370, 1313-1317.     

A new enzymatic method for determination of E. coli

Inthispaper,arapid,sensitiveandsimpleenzymaticmethodfordetectingtheE.coltcellshasbeenestablished.P-GalactosidaseisakindofendoenzymeexistingintheE.coltcells.Itcanbereleasedfromthecellsbythepore-formingactionofcolicinEI,andcanbedetectedrapidlybyenZymatic..thodl.Colici.,areplasmid-encodedproteins,bindspecificallytoparticularreceptorsontheoutermembraneofsensitivecellsan.dactmainlythroughtwopathways'.Beca.s.theycanformporesinthemembrane,colicinshavebeenwidelyusedastoolstostudythebiologicalandphy…     

润滑剂和添加剂

336.石油高粘度馏分的各類碳原子分布和粘度-比重常數及折射率截距的關係(Relationship between Carbon-Type Composition, Viscosity-Gravity Constant, and Refractivity Intercept of Viscous Fractions of Petroleum, S. S. Kurtz, Jr., R. W. King, W. J. Stout, D. G. Partikian & E. A. Skrabek, Anal. Cham., 1956, 28, No. 12, 1928—36)——     

A Minor New Diterpenoid Alkaloids from the Roots of Delphinium Souliei Franch

Inourpreviouspapers1-3,wehavereportedtheisolationandelucidationofaseriesofnewditerpenoidalkaloidsfromtheaerialpartofDelphiniumsoulieiFranch.Inthisstudy,phytochemcalinvestigationsontheconstituentsoftherootsofthisplanthaveledtotheisolationofaminornewditerpenoidalkaloidsoulidine.A Minor New Diterpenoid Alkaloids from the Roots of Delphinium Souliei Franch1. K. Zhang, L. He, X. Pan, YZ. Chen Planta Med, 1998, 64(6), 580. 2. L. He, Y J. Pan, X. Pan, B. G. Li, Y Z. Chen Chin. Chem.…     

SUBJECT INDEX to Vol.16,2005

Analytical Chemistry A model-based phenomenological investigation of char combustion kinetics through thermogravimetry.….....Q. CHEN, R. HE, Z. G. LIANG, X. C. XU, C. H. CHEN 393 A Multiwall carbon nanotube-chitosan modified electrode for selective detection of dopamine in the presence of ascorbic acid……….……………….................………. …………………………………………..L. Y. JIANG, C. Y. LIU, L. P. JIANG, G. H. LU 229 A new approach for removal of nitrogen oxides …     

Mixed micellization of an anionic gemini surfactant (GA) with conventional polyethoxylated nonionic surfactants in brine solution at pH 5 and 298 K

The micellization behavior of an anionic gemini surfactant, GA with nonionic surfactants C₁₂E₈ and C₁₂E₅ in presence of 0.1 M NaCl at 298 K temperature, has been studied tensiometrically in pure and mixed states, and the related physicochemical parameters (cmc, γ _cmc, pC ₂₀, Γ _max, and A _min) have been evaluated. Tensiometric profile (γ vs log [surfactant]), for conventional surfactants, generally consists of a single point of intersection; a gradually decreasing line (normally linear, or with slight curvature) ultimately saturates in γ at a particular [surfactant], corresponding to complete monolayer saturation. The gemini, in this report, led to two unequivocal breaks in the tensiometric isotherm. An attempt to the interpretation of the two breaks from molecular point of view is provided, depending solely on the chemical structure of the surfactant. The gemini, even in mixed state with the conventional nonionic surfactants C₁₂E₅ and C₁₂E₈, manifested the dual breaks; of course, the dominance of the feature decreases with increasing mole fraction of the nonionics in the mixture. Theories of Clint, Rosen, Rubingh, Motomura, Georgiev, Maeda, and Nagarajan have been used to determine the interaction between surfactants at the interface and micellar state of aggregation, the composition of the aggregates, the theoretical cmc in pure and mixed states, and the structural parameters according to Tanford and Israelachvili. Several thermodynamic parameters have also been predicted from those theories.     

定量结构-性质相关原理在阴离子表面活性剂临界胶束浓度预测中的应用

利用定量结构-性能相关（QSPR）原理，建立起了8类不同结构，计40个阴离子 表面活性剂临界胶束浓度（cmc）的定量模型。所得到的最佳模型包括：分子总能 量（E_T）、分子生成热（ΔH_f）、分子偶极矩（D）、前线分子轨道能量（E_ (LUMO),E_(HOMO)）及憎水基0级Kier & Hall指数（KHO），计6个描述符，复相关 系数R~2 = 0.9778。     

Interfacial and Thermodynamic Properties of Anionic‐Nonionic Mixed Surfactant System: Influence of Hydrophobic Chain Length of the Nonionic Surfactant

The influence of hydrophobic chain length in nonionic surfactants on interfacial and thermodynamics properties of a binary anionic‐nonionic mixed surfactant was investigated. In this study, nonionic surfactants lauric‐monoethanolamide (C₁₂ MEA) and myrisitic‐monoethanolamide (C₁₄ MEA) were mixed with an anionic surfactant, α‐olefin sulfonate (AOS). The critical micelle concentration (cmc), maximum surface excess (Γ_max), and minimum area per molecule (A_min) were obtained from surface tension isotherms at various temperatures. The thermodynamic parameters of micellization and adsorption were also computed. Micellar aggregation number (N_agg), micropolarity, and binding constant (K_sv) of pure and mixed surfactant system was calculated by fluorescence measurements. Rubingh's method was applied to calculate interaction parameters for the mixed surfactant systems.     

Physicochemical Properties and Surface Tension Prediction of Mixed Surfactant Systems: Triton X‐100 with Dodecylpyridinium Bromide and Triton X‐100 with Sodium Dodecylsulfonate

Dependences of the surface tension of aqueous solutions of ionic (dodecylpyridinium bromide, sodium dodecylsulfonate) and nonionic (Triton X‐100) surfactants and their mixtures on total surfactant concentration and solution composition were studied, and the surface tension of the mixed systems were predicted using different Miller's model. It was found that how to select the model for calculation of ω is corresponding to the degree of the deviation from the ideality during the adsorption of mixed surfactants. The compositions of micelles and adsorption layers at air‐solution interface as well as parameters (β^m, β^ads) of headgroup‐headgroup interaction between the molecules of ionic and nonionic surfactants were calculated based on Rubingh model. The parameters (B₁) of chain‐chain interaction between the molecules of ionic and nonionic surfactants were calculated based on Maeda model. The free energy of micellization calculated from the phase separation model (ΔG ₂ ^m ), and by Maeda's method (ΔG ₁ ^m ) agree reasonably well at high content of nonionic surfactant. The excess free energy ΔG _ads ^E and ΔG _m ^E (except α=0.4) for TX‐100/SDSn system are more negative than that TX‐100/DDPB system. These can be probably explained with the EO groups of TX‐100 surfactant carrying partial positive charge.