Chemical Synthesis最新文献_第8页

Alkalinity-controlled zeolite nucleation and growth: ultrafast synthesis of total-morphology zeolite L mesocrystals and adsorption evaluation 碱度控制沸石成核与生长:全形态沸石L介晶的超快合成及吸附评价

Chemical Synthesis Pub Date : 1900-01-01 DOI: 10.20517/cs.2022.25

{"title":"Alkalinity-controlled zeolite nucleation and growth: ultrafast synthesis of total-morphology zeolite L mesocrystals and adsorption evaluation","authors":"","doi":"10.20517/cs.2022.25","DOIUrl":"https://doi.org/10.20517/cs.2022.25","url":null,"abstract":"Owing to the intrinsic complexity of crystallization and the heterogeneity of precursors, the specific stages and corresponding behaviors of an actual crystallization system remain ambiguous, which makes the univariate-controlled crystallization-kinetics-regulated synthesis and design of zeolite morphology and porosity an unrealized blueprint. In this study, a facile and univariate modulation (i.e., OH-/SiO2) strategy was developed to regulate zeolite crystallization kinetics, and zeolite L mesocrystals were synthesized rapidly (within 1-2 h) with almost all LTL morphologies (from cylindrical or disc-like shapes to nanoclusters or nanocrystals) in the simplest SiO2-Al2O3-K2O-H2O system. Using time-resolved analysis of the change in the solid-liquid Si/Al nutrient and crystallinity evolution, the intertwined and complex crystallization processes of zeolite L were clearly distinguished into four distinct stages: induction, nucleation, growth, and ripening. Under alkalinity-controlled conditions, the reactivity, Si/Al distribution, and state of aluminosilicates were critical to the formation of short-range order in the amorphous matrix, which greatly influenced the nucleation frequency and assembly state. Subsequently, these nucleation differences evoked correspondingly different kinetic growth behaviors. A putative alkalinity-controlled nonclassical crystallization mechanism was uncovered, and its validity was evaluated by analyzing morphology evolution, NH4F etching, and the effects of modifiers. Furthermore, adsorption tests demonstrated the high adsorption capacity of a series of zeolite L for guest molecules with various sizes and properties (e.g., gaseous aromatic hydrocarbon, aqueous dye, and protein).","PeriodicalId":381136,"journal":{"name":"Chemical Synthesis","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116478383","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}

引用次数: 0

Chiral phosphoric acid catalyzed redox deracemization of triarylmethanes 手性磷酸催化三芳基甲烷氧化还原脱羧

Chemical Synthesis Pub Date : 1900-01-01 DOI: 10.20517/cs.2023.18

Chang Liu, Zhi-Yi Li, Pengfei Li, Jianwei Sun

引用次数: 0

Happy birthday Chemical Synthesis! 化学合成生日快乐!

Chemical Synthesis Pub Date : 1900-01-01 DOI: 10.20517/cs.2022.09

B. Su

引用次数: 0

Pore structure unveiling effect to boost lithium-selenium batteries: selenium confined in hierarchically porous carbon derived from aluminum based MOFs 孔隙结构揭示效应增强锂硒电池:硒被限制在铝基mof衍生的分层多孔碳中

Chemical Synthesis Pub Date : 1900-01-01 DOI: 10.20517/cs.2023.16

Hong-Yan Li, Chaofan Li, Ying‐Ying Wang, Wen-Da Dong, Xikun Zhang, Ming‐Hui Sun, Yu Li, Bao‐Lian Su

{"title":"Pore structure unveiling effect to boost lithium-selenium batteries: selenium confined in hierarchically porous carbon derived from aluminum based MOFs","authors":"Hong-Yan Li, Chaofan Li, Ying‐Ying Wang, Wen-Da Dong, Xikun Zhang, Ming‐Hui Sun, Yu Li, Bao‐Lian Su","doi":"10.20517/cs.2023.16","DOIUrl":"https://doi.org/10.20517/cs.2023.16","url":null,"abstract":"Lithium-selenium (Li-Se) batteries have attracted much attention in recent years because of their high volumetric capacity (3253 mA h cm-3) compared to the current commercial Li-ion battery. The shuttle effect and large volume variation during the electrochemical reactions limit its practical applications. The widely accepted strategy to reduce these drawbacks is confining selenium (Se) in porous carbon materials. However, how to boost electrochemical kinetics, reduce the shuttle effect and accommodate volume expansion for maximized battery performance still remains highly challenging. Herein, we synthesized three kinds of hierarchically porous carbon materials by facile pyrolysis of aluminum-based metal-organic frameworks (MOFs) with different porous networks. The large surface area and high pore volume can ensure the excellent polyselenides adsorption while tailoring the ratio between micropores and mesopores of the hierarchically porous hosts can highly enhance electrolyte and electron transportation, leading to excellent electrochemical performance with a capacity as high as 530.1 mA h g-1 (Se@MIL-68-800) after 200 cycles, an excellent rate capability of 307 mA h g-1 at 5 C, and a high reversible capacity of 544 mA h g-1 when current density returns to 0.1 C. The present invention not only provides a facile way to obtain hierarchically porous carbon materials from MOFs but also gives insights on tailoring micropores and mesopores proportion to maximize Li-Se battery performance for their practical industrial implementation.","PeriodicalId":381136,"journal":{"name":"Chemical Synthesis","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132457123","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}

引用次数: 1

A versatile messenger for chirality communication: asymmetric silica framework 手性通信的多功能信使:不对称硅框架

Chemical Synthesis Pub Date : 1900-01-01 DOI: 10.20517/cs.2021.16

Xinling Liu, R. Jin

引用次数: 0

Interface chemistry for sodium metal anodes/batteries: a review 金属钠阳极/电池界面化学研究进展

Chemical Synthesis Pub Date : 1900-01-01 DOI: 10.20517/cs.2022.19

Guojie Li, Xinyao Lou, Chen-Shan Peng, Chuntai Liu, Wei Chen

{"title":"Interface chemistry for sodium metal anodes/batteries: a review","authors":"Guojie Li, Xinyao Lou, Chen-Shan Peng, Chuntai Liu, Wei Chen","doi":"10.20517/cs.2022.19","DOIUrl":"https://doi.org/10.20517/cs.2022.19","url":null,"abstract":"Sodium metal batteries (SMBs), benefiting from their low cost and high energy densities, have drawn considerable interest as large-scale energy storage devices. However, uncontrollable dendritic formation of sodium metal anodes (SMAs) caused by inhomogeneous deposition of Na+ severely decreases the Coulombic efficiency, leads to short cycling life, and poses potential safety hazards, dragging SMBs out of practical applications. Electrolytes are attracting massive attention for not only providing ion transport channels but also exhibiting vital effects on interfacial compatibility and dendrite growth. In fact, the as-formed solid electrolyte interphase (SEI) has a great influence on the deposition and stripping process of SMAs. Moreover, Na plating process is accompanied by the generation of SEI, in which the electrolyte plays a vital role. Nevertheless, until now, the interaction among electrolyte-SEI-sodium dendrite has rarely been summarized. Herein, a fundamental understanding of sodium dendrite is concluded and the influence of the electrolyte and interface on Na+ deposition is emphasized. Furthermore, the outlook for constructing dendrite-inhibited SMAs is suggested.","PeriodicalId":381136,"journal":{"name":"Chemical Synthesis","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123167433","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}

引用次数: 9

Advancements of non-viologen-based anolytes for pH-neutral aqueous organic redox flow batteries ph中性水相有机氧化还原液流电池非紫罗兰碱基阳极液的研究进展

Chemical Synthesis Pub Date : 1900-01-01 DOI: 10.20517/cs.2023.07

Hong Sun, Feiyang Hu, Zirui Jiang, Zhiwen Cui, Mahalingam Ravivarma, Hao Fan, Jiangxuan Song, D. Kong

{"title":"Advancements of non-viologen-based anolytes for pH-neutral aqueous organic redox flow batteries","authors":"Hong Sun, Feiyang Hu, Zirui Jiang, Zhiwen Cui, Mahalingam Ravivarma, Hao Fan, Jiangxuan Song, D. Kong","doi":"10.20517/cs.2023.07","DOIUrl":"https://doi.org/10.20517/cs.2023.07","url":null,"abstract":"Aqueous organic redox flow battery (AORFB) is regarded as the most promising next-generation technology for energy storage that stores electricity in redox-active organics lysed in mild salt-electrolytes. Composed of abundant elements such as C, H, O, and N, the adapted organics have a high degree of structural diversity and tunability, endowing it possible to modulate the physicochemical properties of water solubility, redox potential, and stability, and resulting in potential cost-effectiveness, ecological and environmental safety. Therefore, the designable organics consumedly expand the distance for exceeding battery behaviors in comparison with the inorganic counterparts. Herein, this study presents an overview of pH-neutral AORFBs that employ nonflammable water-soluble molecules with cheap inorganic salts as supporting electrolytes. Particular emphasis is given to the progress of molecular engineering design and synthesis of non-viologen-based organic anolytes and their respective AORFB performance. Additionally, some comments on present opportunities and perspectives of this ascendant domain are also demonstrated.","PeriodicalId":381136,"journal":{"name":"Chemical Synthesis","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125370243","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}

引用次数: 0

Recent topics on circularly polarized luminescence generated by inorganic materials 无机材料产生圆偏振光的最新研究课题

Chemical Synthesis Pub Date : 1900-01-01 DOI: 10.20517/cs.2022.01

Xinling Liu, R. Jin

引用次数: 3

Boosting lithium-selenium batteries 提升锂硒电池

Chemical Synthesis Pub Date : 1900-01-01 DOI: 10.20517/cs.2022.13

X. Yao

引用次数: 0

Nanodiamond derived N-doped sp3@sp2 hybrid carbocatalysts for the aerobic oxidative synthesis of 2-substituted benzoxazoles 纳米金刚石衍生n掺杂sp3@sp2杂化碳催化剂用于2-取代苯并恶唑的有氧氧化合成

Chemical Synthesis Pub Date : 1900-01-01 DOI: 10.20517/cs.2023.08

Qingqing Gu, Rui Huang, Chi Xu, Shiyan Li, S. Perathoner, G. Centi, Yuefeng Liu

{"title":"Nanodiamond derived N-doped sp3@sp2 hybrid carbocatalysts for the aerobic oxidative synthesis of 2-substituted benzoxazoles","authors":"Qingqing Gu, Rui Huang, Chi Xu, Shiyan Li, S. Perathoner, G. Centi, Yuefeng Liu","doi":"10.20517/cs.2023.08","DOIUrl":"https://doi.org/10.20517/cs.2023.08","url":null,"abstract":"Carbocatalysts, as a member of metal-free catalysts, have shown promising potentials in many catalytic transformations in the past few decades. Nitrogen doping has been identified as an effective way to tailor the properties of carbocatalysts and render their potential use for various applications. It is also important to fabricate unique surface compositions or properties for the N species to enhance their intrinsic catalytic activities. Hybrid sp3@sp2 nanocarbons, from this perspective, could enhance catalytic activity by tuning the electronic structure of the active sites. Herein, N-doped sp3@sp2 hybrids were prepared from nanodiamonds (NDs) and (NH4)2CO3 as starting N precursor to dope the NDs and tune their sp3/sp2. The N-doped sp3@sp2 hybrid nanocarbons were studied in the oxidative catalytic synthesis of a broad series of drug-related compounds (23 examples of 2-substituted benzoxazoles, benzothiazoles and benzimidazoles). These catalysts show high catalytic activity and reusability in mild conditions. Their performances are comparable to homogeneous/heterogeneous metal-based catalysts. The pyridinic N species determine the enhancement in the catalytic performance. The mechanistic results indicate that the N-doped sp3@sp2 hybrid activates oxygen molecules to form O2•- as reactive oxygen species, which abstracts the proton attached on the catalyst's surface. This study provides an attractive and useful methodology for applying ND-derived carbocatalysts to synthesise 2-substituted benzoxazoles and more complex drug targets.","PeriodicalId":381136,"journal":{"name":"Chemical Synthesis","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116983729","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}

引用次数: 1