Chemical Synthesis最新文献_第4页

A simple strategy for synthesis of b-axis-oriented MFI zeolite macro-nanosheets 一种合成b轴取向MFI沸石宏观纳米片的简单策略

Chemical Synthesis Pub Date : 2023-08-25 DOI: 10.20517/cs.2023.27

Wenshu Tai, W. Dai, Guangjun Wu, Landong Li

{"title":"A simple strategy for synthesis of b-axis-oriented MFI zeolite macro-nanosheets","authors":"Wenshu Tai, W. Dai, Guangjun Wu, Landong Li","doi":"10.20517/cs.2023.27","DOIUrl":"https://doi.org/10.20517/cs.2023.27","url":null,"abstract":"Zeolite nanosheets with shortened diffusion paths and high external surface areas have drawn significant attention. This unique morphology of zeolites can endow them with reduced diffusion resistance and high accessibility of active sites, and thereby good catalytic performance. Exploring simple synthesis strategies for zeolite nanosheets is mostly desired in zeolite chemistry. Herein, MFI zeolite nanosheets with a thickness of 50-100 nm along the b -axis and a length of 1 μm along the c -axis, namely zeolite macro-nanosheets, have been successfully synthesized via the strategy of combining pre-aging and pH regulation without the use of complex templates/additives and fluorine media. Pre-aging at a relatively high temperature of 90 °C and low alkalinity for crystallization (pH = 7.0~8.5) are found to play key roles in controlling macro-nanosheet synthesis, which can promote the formation of MFI zeolite precursors and then dissociate them into smaller ones for the following oriented aggregation during hydrothermal treatment. Crystallization kinetic studies suggest that the two-dimensional crystal growth is the intrinsic behavior of zeolite crystallization under employed conditions. This synthesis strategy can be easily extended to the synthesis of heteroatom-containing MFI macro-nanosheets, such as ZSM-5 and TS-1.","PeriodicalId":381136,"journal":{"name":"Chemical Synthesis","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124127024","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

Self-assembly method for two-dimensional mesoporous materials: a review for recent progress 二维介孔材料的自组装方法研究进展

Chemical Synthesis Pub Date : 2023-08-22 DOI: 10.20517/cs.2023.26

Danyan Feng, Xuefeng Li, Ling Zhang, Zhen‐An Qiao

引用次数: 0

Self-assembled nanostructures and materials: smart and bright! 自组装纳米结构和材料:智能和明亮!

Chemical Synthesis Pub Date : 2023-08-02 DOI: 10.20517/cs.2023.36

Chen Wang

引用次数: 0

Enantioselective synthesis of 6-(Indole-2-yl)-3,4-dihydropyran-2-one skeletons by N-Heterocyclic carbene-catalyzed asymmetric [3 + 3] cycloaddition of α-bromocinnamaldehyde n-杂环碳催化α-溴肉桂醛不对称[3 + 3]环加成对映选择性合成6-(吲哚-2-基)-3,4-二氢吡喃-2- 1骨架

Chemical Synthesis Pub Date : 2023-07-21 DOI: 10.20517/cs.2023.14

Gao He, Xiaoyu Chen, Siqi Xia, Guofu Zhong, Limin Yang

引用次数: 0

Direct construction of d3-methylated all-carbon quaternary stereocenters through carbene-catalyzed desymmetrization 通过碳催化去对称直接构建3-甲基化全碳季立体中心

Chemical Synthesis Pub Date : 2023-07-19 DOI: 10.20517/cs.2023.04

Jing-Yu Guo, Ye Zhang, Xiaoxiang Zhang, Zhenqian Fu

引用次数: 0

Mechanisms of nickel-catalyzed reductive cross-coupling reactions 镍催化的还原性交叉偶联反应机理

Chemical Synthesis Pub Date : 2023-01-01 DOI: 10.20517/cs.2023.20

Hongli Wu, Shuo-Qing Zhang, Xin Hong

引用次数: 0

Deciphering the interaction mechanism between copper and polysulfides for enhanced performance and cost-efficiency in quasi-sodium-sulfur batteries 破译铜和多硫化物之间的相互作用机制，以提高准钠硫电池的性能和成本效率

Chemical Synthesis Pub Date : 2023-01-01 DOI: 10.20517/cs.2023.22

Haobin Song, Tong Li, Tingting He, Guanghui Chen, Chengjiang Deng, Dezhi Kong, Dong Yan, Hui Ying Yang, Shaozhuan Huang

{"title":"Deciphering the interaction mechanism between copper and polysulfides for enhanced performance and cost-efficiency in quasi-sodium-sulfur batteries","authors":"Haobin Song, Tong Li, Tingting He, Guanghui Chen, Chengjiang Deng, Dezhi Kong, Dong Yan, Hui Ying Yang, Shaozhuan Huang","doi":"10.20517/cs.2023.22","DOIUrl":"https://doi.org/10.20517/cs.2023.22","url":null,"abstract":"Room-temperature Na-S batteries with Al current collectors face the long-standing challenges of poor cycling performance and rate capability due to the serious sodium polysulfides (NaPSs) shuttling and sluggish reaction kinetics. Here, we demonstrate that a high-performance and low-cost quasi-Na-S battery can be realized by using the Cu@carbon nanotube (CNT) cathode host and unconventional Cu current collector (Cu-CC) in an ether electrolyte. Detailed ex-situ characterizations reveal that the Cu@CNT/S was transformed to NaPSs anchoring on Cu7S4 nanocrystals (~11 nm) during the cycling, forming the NaPS@Cu7S4/CNT cathode with robust sulfur immobilization and enhanced Na+ reaction kinetics. Moreover, the chemical interaction between NaPSs and Cu-CC in situ creates a robust Cu-CC/electrode interface with ultra-small resistance (< 4 Ω), greatly improving the electrode stability and charge transfer kinetics. The synergy of efficient NaPSs trapping and favorable Cu/electrode interface endows the quasi-Na-S battery with a moderate discharge plateau (around 1.2~1.75 V), excellent rate capability (396.9 mAh g-1 at 10 A g-1), and ultra-stable cycling performance (nearly no capacity decay over 1190 cycles). These features make it quite suitable for stable and cost-sensitive grid-scale applications.","PeriodicalId":381136,"journal":{"name":"Chemical Synthesis","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135600658","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 advances in organocatalytic cascade reactions for enantioselective synthesis of chiral spirolactone skeletons 手性螺内酯骨架对映选择性合成的有机催化级联反应研究进展

Chemical Synthesis Pub Date : 2023-01-01 DOI: 10.20517/cs.2022.38

Jun Yang, B. Pan, Lin Chen, Ying Zhou, Xiongli Liu

{"title":"Recent advances in organocatalytic cascade reactions for enantioselective synthesis of chiral spirolactone skeletons","authors":"Jun Yang, B. Pan, Lin Chen, Ying Zhou, Xiongli Liu","doi":"10.20517/cs.2022.38","DOIUrl":"https://doi.org/10.20517/cs.2022.38","url":null,"abstract":"Chiral spirolactones, including spiropropyllactones, spirobutyrolactones, and spirovalerolactones, are important heterocyclic frameworks that attracted the attention of organic and medicinal chemists because these motifs constitute the core structure of several natural products and bioactive molecules. The absolute configuration and the substituents on the fully substituted spirocyclic stereocenter of the lactone can potentially enhance specificity for ligand-protein binding and enhance bioavailability, potency, and metabolic stability. So, intensive attention from chemists has been paid to the synthetic methods leading to such prominent structural motifs. The synthetic methods can be divided into two main classes. The first approach takes advantage of the presence of the existing lactone structure and focuses on its functionalization. The second approach is the lactone framework constructed from various precursors in a direct spirolactonization reaction. In this review, for convenience in reading, the recent advances in the synthesis of spirolactones are summarized and discussed according to the two major organocatalytic asymmetric synthetic routes: (i) using the lactone-related frameworks as building blocks; and (ii) direct spirolactonization reaction using various reagents. This review also describes both the mechanisms and related transformations, and gives some insights into challenging issues in this research field, which will enlighten the future development of this field.","PeriodicalId":381136,"journal":{"name":"Chemical Synthesis","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127470885","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

Future prospects in boron chemistry: new boron compounds and Lewis acids for catalysis and materials science 硼化学的未来展望:用于催化和材料科学的新型硼化合物和路易斯酸

Chemical Synthesis Pub Date : 2021-09-23 DOI: 10.20517/cs.2021.11

G. Berionni

引用次数: 1

Sterol biosynthesis: 2,3-oxidosqualene analogues 甾醇生物合成:2,3-氧化角鲨烯类似物

Chemical Synthesis Pub Date : 2021-08-24 DOI: 10.20517/CS.2021.12

Hisashi Yamamoto

引用次数: 1