化学•材料最新文献

{"title":"How the Most Neglected Residual Species in MOF-Based Catalysts Involved in Catalytic Reactions to Form Toxic Byproducts","authors":"Fukun Bi, Jiafeng Wei, Bin Gao, Shuting Ma, Ning Liu, Jingcheng Xu, Baolin Liu, Yuandong Huang, Xiaodong Zhang","doi":"10.1021/acs.est.4c06351","DOIUrl":"https://doi.org/10.1021/acs.est.4c06351","url":null,"abstract":"In recent years, multifarious new materials have been developed for environmental governance. Thereinto, metal organic framework (MOF)-based catalysts have been widely employed for heterogeneous catalysis because of their high porosity to confine noble metal particles faraway from aggregation. However, the potential reactions between residual species from the material synthesis process and target pollutants, which could form highly toxic byproducts, are often neglected. Herein, we took the widely used Zr-MOF, UiO-66, with highly thermal stability supported Pd catalysts as the example to investigate how the residual species in catalysts are involved in aromatic volatile organic compounds (VOCs) degradation reaction. The results showed that residual Cl species originated from the ZrCl₄ metal precursor participated in the VOC degradation reaction, leading to the production of various chlorine-containing byproducts, even the hypertoxicity dioxin precursor, dichlorobenzene. Meanwhile, the chlorination mechanism for the formation of chlorine-containing byproducts was revealed by density functional theory calculation. Furthermore, the highly efficient residual Cl removal approaches are proposed. Importantly, the migration and transformation of residual Cl during the degradation of five benzene series VOCs are comprehensively studied and elucidated. We anticipate that these findings will raise alarm about the neglected issue of residual species in MOF-based catalysts for heterogeneous catalysis, especially environmentally friendly catalysis.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":null,"pages":null},"PeriodicalIF":9.028,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cascade [3 + 2] Annulation of 1,3-Dicarbonyl Compounds and Ethyl Secondary Amines for Pyrrole Synthesis via Poly C(sp3)–H Bond Functionalization","authors":"Xiuli Li, Yunyun Liu, Jie-Ping Wan","doi":"10.1021/acs.joc.4c02127","DOIUrl":"https://doi.org/10.1021/acs.joc.4c02127","url":null,"abstract":"The synthesis of polyfunctionalized pyrroles via the cascade reactions of 1,3-dicarbonyl compounds and two molecules of ethyl secondary amines has been realized via simple iodine catalysis in the presence of Dess–Martin periodinane (DMP). The formation of the target pyrrole products involves the formation of one new C–C and two new C–N bonds via the major functionalization of six C(sp³)–H bonds, presenting a highly novel and efficient synthetic protocol toward pyrrole scaffolds.","PeriodicalId":57,"journal":{"name":"The Journal of Organic Chemistry","volume":null,"pages":null},"PeriodicalIF":4.354,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452363","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":"Molecular Insights into the Microscopic Behavior of CO2 Hydrates in Oceanic Sediments: Implications for Carbon Sequestration","authors":"Fengyi Mi, Wei Li, Jiangtao Pang, Othonas A. Moultos, Fulong Ning, Thijs J.H. Vlugt","doi":"10.1021/acs.jpcc.4c05413","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c05413","url":null,"abstract":"Knowledge of the microscopic behavior of CO₂ hydrates in oceanic sediments is crucial to evaluate the efficiency and stability of hydrate-based CO₂ sequestration in oceans. Here, systematic molecular dynamics simulations are executed to investigate the growth and dissociation of CO₂ hydrates, and the mechanical instability of CO₂ hydrate-Illite interface in the brine-urea-Illite system. Simulation results show that the CO₂ hydrate growth is jointly affected by the confined space, Illite surface properties, and presence of urea. Specifically, the interfacial H₂O and the ion layer on the Illite surface hinder the growth of CO₂ hydrate crystals toward Illite surfaces. Urea molecules can bind salt ions and increase CO₂ concentrations in the water, thus kinetically promoting CO₂ hydrate growth. The dissociation of the CO₂ hydrate is affected by Illite surface properties and the CO₂ hydrate structure. CO₂ hydrate starts from the regions where hydrate particles are minimally in contact and extends on both sides. The mechanical tension and compression of the CO₂ hydrate-Illite interface exhibit nonlinear characteristics by changing the hydrogen bonds and the CO₂ hydrate structure. The molecular insight into the microscopic behavior of CO₂ hydrates in the brine-urea-Illite system contributes to a broader understanding of hydrate-based CO₂ sequestration.","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":null,"pages":null},"PeriodicalIF":4.126,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452018","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":"Large Magnetic Anisotropy in van der Waals Ferromagnet Fe3GaTe2 above Room Temperature","authors":"Yilian Xi, Hanqing Shi, Jingwei Zhang, Heping Li, Ningyan Cheng, Hang Xu, Jiaqi Liu, Keren Li, Huaiming Guo, Haifeng Feng, Jianfeng Wang, Weichang Hao, Yi Du","doi":"10.1021/acs.jpclett.4c02426","DOIUrl":"https://doi.org/10.1021/acs.jpclett.4c02426","url":null,"abstract":"Discoveries of above-room-temperature intrinsic ferromagnetism in two-dimensional (2D) van der Waals (vdW) materials offer a platform for studying fundamental 2D magnetism and spintronic devices, especially the recently discovered above-room-temperature 2D vdW Fe₃GaTe₂ (FGaT). However, the magnetic mechanism in FGaT remains elusive. Here, a detailed investigation using magnetic force microscopy on the thickness-dependent magnetic behavior of FGaT single crystals is reported. The Heisenberg exchange interaction constant (<i>J</i>) at room temperature is determined to be 1.32836 × 10^–12 J/m. Our study combining angle-resolved photoemission spectroscopy and density functional theory suggests that the high Curie temperature in FGaT is attributed to the shift of the localized Fe <i>d</i> band toward the Fermi level as well as the enhanced magnetic exchange effect due to the strong itinerant ability of Fe. This work sheds light on the understanding of magnetism in FGaT and provides a promising platform to investigate the mechanisms of 2D magnetic materials.","PeriodicalId":62,"journal":{"name":"The Journal of Physical Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":6.475,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452016","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":"Enhanced Rock Weathering as a Source of Metals to Promote Methanogenesis and Counteract CO2 Sequestration","authors":"Donglei Zhang, Qiang Zeng, Hongyu Chen, Dongyi Guo, Gaoyuan Li, Hailiang Dong","doi":"10.1021/acs.est.4c04751","DOIUrl":"https://doi.org/10.1021/acs.est.4c04751","url":null,"abstract":"Enhanced weathering of (ultra)mafic rocks has been proposed as a promising approach to sequester atmospheric CO₂ and mitigate climate change. However, these silicate rocks contain varying amounts of trace metals, which are essential cofactors of metallaenzymes in methanogens. We found that weathering of crushed peridotite and basalt significantly promoted the growth and methanogenesis of a model methanogen─<i>Methanosarcina acetivorans</i> C2A under the condition of excess substrate. The released trace metals from peridotite and basalt, especially Fe, Ni, and Co, accounted for the promotion effect. Observation at different spatial scales showed a close association between the rocks and cells. Proteomic analysis revealed that rock amendment significantly enhanced the expression of core metalloenzymes in the methylotrophic methanogenesis pathway. Our study uncovers a previously unrecognized but important negative effect of enhanced rock weathering on methane production, which may counteract the carbon sequestration effort.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":null,"pages":null},"PeriodicalIF":9.028,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eutrophication and Dissolved Organic Matter Exacerbate the Diel Discrepancy of CO2 Emissions in China’s Largest Urban Lake","authors":"Yang Wang, Bingjie Ma, Y. Jun Xu, Shuai Shen, Xi Huang, Yan Wang, Songlin Ye, Xiaokang Tian, Yifei Zhang, Tong Wang, Siyue Li","doi":"10.1021/acs.est.4c06244","DOIUrl":"https://doi.org/10.1021/acs.est.4c06244","url":null,"abstract":"The large variability in the emissions of carbon dioxide (CO₂) from urban lakes remains a challenge for partitioning these sources at meaningful spatial and temporal scales. Dissolved organic matter (DOM) governs the spatial and temporal variations in CO₂, yet relationships of the CO₂ concentration (cCO₂) and emission flux (FCO₂) with DOM in urban lakes have rarely been reported. In this study, we monitored levels of cCO₂, FCO₂, and the composition of DOM over a 24 h period at three sites during the dry and wet seasons in China’s largest urban lake, Tangxun Lake. Our study found the ratio of day/night FCO₂ (millimoles per square meter per day) decreased from the dry season (0.79; 7.68/9.68) to the wet season (0.25; 6.05/24.16), averaging 0.42 (6.77/15.97), implying that accounting for nighttime CO₂ emissions can increase regional estimates by 70%. This study revealed that eutrophication affected diurnal CO₂ emissions with greater algal growth enhancing daytime CO₂ uptake and subsequently increasing nighttime CO₂ emissions via DOM degradation (larger protein-like DOM fraction). We anticipate that the relative magnitude of FCO₂ between day and night from lakes is likely to increase due to urbanization and climate change, underscoring the importance of treating urban lakes as a distinct group and integrating DOM dynamics into carbon cycling in future research.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":null,"pages":null},"PeriodicalIF":9.028,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coupling Effect of Elemental Carbon and Organic Carbon on the Changes of Optical Properties and Oxidative Potential of Soot Particles under Visible Light","authors":"Rui Tang, Jiong Cao, Jing Shang, Yu Kuang, Hong Geng, Xinghua Qiu","doi":"10.1021/acs.est.4c09217","DOIUrl":"https://doi.org/10.1021/acs.est.4c09217","url":null,"abstract":"Soot particles, coming from the incomplete combustion of fossil or biomass fuels, feature a core–shell structure with inner elemental carbon (EC) and outer organic carbon (OC). Both EC and OC are known to be photoactive under solar radiation. However, research on their coupling effect during photochemical aging remains limited. This study examines how the optical properties and oxidative potential (OP) of wood, coal, and diesel soot particles with varying EC and OC levels are affected by exposure to visible light. Wood soot, which has the highest OC content, showed the most significant changes in both optical properties and OP, indicating its highest sensitivity to visible light aging. Molecular composition analysis revealed that the reduction of polycyclic aromatic hydrocarbons (PAHs) and methyl-PAHs primarily affects the optical properties, while oxygenated PAHs play a major role in OP. Combined with the results from reactive oxygen species detection, it is suggested that EC initiates photoreactions by generating superoxide anions, while OC undergoes compositional changes that result in subsequent atmospheric effects. These findings enhance our understanding of the photochemical aging process of soot particles and their implications for climate and health.","PeriodicalId":36,"journal":{"name":"环境科学与技术","volume":null,"pages":null},"PeriodicalIF":9.028,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrogen Fluoride Imidazole: A Simple, Efficient, Mild, and Cost-Effective Silyl-Ether Deprotection Reagent","authors":"Xuan Zhou, Yannick Fillon, Xianglin Shi, Firoz Antia, Xiao Zhou, Angela Lin","doi":"10.1021/acs.joc.4c01885","DOIUrl":"https://doi.org/10.1021/acs.joc.4c01885","url":null,"abstract":"Despite the availability of numerous −OH silyl protection and deprotection methods, the selective cleavage of silyl ethers in highly complex molecules can still be a challenge. In this article, we present results from a full investigation of a novel, efficient, and mild desilylation protocol using HF/imidazole. Imidazole significantly enhances the desilylation reaction efficiency of HF, allowing clean and complete deprotection of TBDPS ethers in substrates containing both acid and base sensitive groups. For example, four- and five-mer oligonucleotides were efficiently deprotected where all other conditions failed. HF/imidazole is also an effective reagent for the deprotection of TIPS and TBDMS ethers. The reagent prepared using commercially available HF and imidazole maintained the same reactivity even after 4 years of storage at 4 °C. Residual reagents and byproducts can be readily removed with a simple workup; consequently, deprotection of TBDPS was successfully implemented in a 2.5 kg scale synthesis of a five-mer oligonucleotide.","PeriodicalId":57,"journal":{"name":"The Journal of Organic Chemistry","volume":null,"pages":null},"PeriodicalIF":4.354,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452361","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":"Nonadiabatic Couplings Facilitate Excitation Wavelength–Dependent Fluorescence in a Cyclooctatetraene-Based Polymorph","authors":"P. E. Swathi Krishna, Vivek V. Dev, Jayashree Nagesh, Mahesh Hariharan","doi":"10.1021/acs.jpcc.4c05336","DOIUrl":"https://doi.org/10.1021/acs.jpcc.4c05336","url":null,"abstract":"Achieving wide-range tunable emission colors in the crystalline state of single fluorophores is a challenging task. Here, we report the vibronic coupling in the crystalline state of a hitherto unexplored class of nonaromatic tetrabrominated dibenzocyclooctatetraene in two distinct polymorphic forms. The thermodynamically stable polymorph (P1) revealed a single-emission maximum upon excitation at different wavelengths in the crystalline state adhering to Kasha’s rule and lacks luminescence from triplet states. In contrast, the kinetically stable form of polymorph (P2) exhibited excitation wavelength–dependent emission with a range of &lt;i&gt;&lt;/i&gt;&lt;span style=\"color: inherit;\"&gt;&lt;/span&gt;&lt;span data-mathml='&lt;math xmlns=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"&gt;&lt;mi mathvariant=\"normal\"&gt;&amp;#x394;&lt;/mi&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;&amp;#x3BB;&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mi&gt;emi&lt;/mi&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mi&gt;max&lt;/mi&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/math&gt;' role=\"presentation\" style=\"position: relative;\" tabindex=\"0\"&gt;&lt;nobr aria-hidden=\"true\"&gt;&lt;span style=\"width: 2.844em; display: inline-block;\"&gt;&lt;span style=\"display: inline-block; position: relative; width: 2.56em; height: 0px; font-size: 110%;\"&gt;&lt;span style=\"position: absolute; clip: rect(1.651em, 1002.56em, 3.014em, -999.997em); top: -2.554em; left: 0em;\"&gt;&lt;span&gt;&lt;span style=\"font-family: STIXMathJax_Main;\"&gt;Δ&lt;/span&gt;&lt;span&gt;&lt;span style=\"display: inline-block; position: relative; width: 1.821em; height: 0px;\"&gt;&lt;span style=\"position: absolute; clip: rect(3.128em, 1000.51em, 4.151em, -999.997em); top: -3.974em; left: 0em;\"&gt;&lt;span&gt;&lt;span style=\"font-family: STIXMathJax_Normal-italic;\"&gt;𝜆&lt;/span&gt;&lt;/span&gt;&lt;span style=\"display: inline-block; width: 0px; height: 3.98em;\"&gt;&lt;/span&gt;&lt;/span&gt;&lt;span style=\"position: absolute; clip: rect(3.469em, 1001.31em, 4.151em, -999.997em); top: -4.372em; left: 0.571em;\"&gt;&lt;span&gt;&lt;span&gt;&lt;span style=\"font-size: 70.7%; font-family: STIXMathJax_Main;\"&gt;max&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span style=\"display: inline-block; width: 0px; height: 3.98em;\"&gt;&lt;/span&gt;&lt;/span&gt;&lt;span style=\"position: absolute; clip: rect(3.355em, 1001.14em, 4.151em, -999.997em); top: -3.69em; left: 0.571em;\"&gt;&lt;span&gt;&lt;span&gt;&lt;span style=\"font-size: 70.7%; font-family: STIXMathJax_Main;\"&gt;emi&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span style=\"display: inline-block; width: 0px; height: 3.98em;\"&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span style=\"display: inline-block; width: 0px; height: 2.56em;\"&gt;&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span style=\"display: inline-block; overflow: hidden; vertical-align: -0.372em; border-left: 0px solid; width: 0px; height: 1.253em;\"&gt;&lt;/span&gt;&lt;/span&gt;&lt;/nobr&gt;&lt;span role=\"presentation\"&gt;&lt;math display=\"inline\" xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;mi mathvariant=\"normal\"&gt;Δ&lt;/mi&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;λ&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mi&gt;emi&lt;/mi&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mi&gt;max&lt;/mi&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/math&gt;&lt;/span&gt;&lt;/span&gt;&lt;script type=\"math/mml\"&gt;&lt;math disp","PeriodicalId":61,"journal":{"name":"The Journal of Physical Chemistry C","volume":null,"pages":null},"PeriodicalIF":4.126,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452092","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":"Nucleoprotein Phase-Separation Affinities Revealed via Atomistic Simulations of Short Peptide and RNA Fragments","authors":"Vysakh Ramachandran, William Brown, Christopher Gayvert, Davit A. Potoyan","doi":"10.1021/acs.jpclett.4c02654","DOIUrl":"https://doi.org/10.1021/acs.jpclett.4c02654","url":null,"abstract":"Liquid–liquid phase separation of proteins and nucleic acids into condensate phases is a versatile mechanism for ensuring the compartmentalization of cellular biochemistry. RNA molecules play critical roles in these condensates, particularly in transcriptional regulation and stress responses, exhibiting a wide range of thermodynamic and dynamic behaviors. However, deciphering the molecular grammar that governs the stability and dynamics of protein–RNA condensates remains challenging due to the multicomponent and heterogeneous nature of condensates. In this study, we employ atomistic simulations of 20 distinct mixtures containing minimal RNA and peptide fragments which allows us to dissect the phase-separating affinities of all 20 amino acids in the presence of RNA. Our findings elucidate chemically specific interactions, hydration profiles, and ionic effects that synergistically promote or suppress protein–RNA phase separation. We map a ternary phase diagram of interactions, identifying four distinct groups of residues that promote, maintain, suppress, and disrupt protein–RNA clusters.","PeriodicalId":62,"journal":{"name":"The Journal of Physical Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":6.475,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452014","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}