Chemistry-Switzerland最新文献

筛选

英文中文

Vapor-Driven Crosslinked Hydroxypropyl-β-Cyclodextrin Electrospun Nanofibrous Membranes for Ultrafast Dye Removal 蒸汽驱动交联羟丙基-β-环糊精电纺丝纳米纤维膜的超快脱色

Chemistry-Switzerland Pub Date : 2024-06-25 DOI: 10.3390/chemistry6040029

Xinmiao Xu, Yi Zhang, Yong Chen, Yu Liu

{"title":"Vapor-Driven Crosslinked Hydroxypropyl-β-Cyclodextrin Electrospun Nanofibrous Membranes for Ultrafast Dye Removal","authors":"Xinmiao Xu, Yi Zhang, Yong Chen, Yu Liu","doi":"10.3390/chemistry6040029","DOIUrl":"https://doi.org/10.3390/chemistry6040029","url":null,"abstract":"Traditional separation membranes used for dye removal often suffer from a trade-off between separation efficiency and water permeability. Herein, we propose a facile approach to prepare cyclodextrin-based high-flux nanofiber membranes by electrospinning and vapor-driven crosslinking processes. The application of glutaraldehyde vapor for crosslinking hydroxypropyl-β-cyclodextrin (HP-β-CD)/polyvinyl alcohol (PVA)/laponite electrospun membranes can build interconnected structures and lead to the formation of a porous hierarchical layer. In addition, the incorporation of inorganic salt, laponite, can alter the crosslinking process, resulting in membranes with improved hydrophilicity and highly maintained electrospun nanofibrous morphology, which contributes to an ultrafast water flux of 1.0 × 105 Lh−1m−2bar−1. Due to the synergetic effect of strong host–guest interaction and electrostatic interaction, the membranes exhibit suitable rejection toward anionic dyes with a high removal efficiency of >99% within a short time and achieve accurate separation for cationic against anionic dyes, accompanied by suitable recyclability with >97% separation efficiency after at least four separation–regenerations. The prepared membranes with remarkable separation efficiency and ultrafast permeation properties might be a promising candidate for high-performance membranes in water treatment.","PeriodicalId":53216,"journal":{"name":"Chemistry-Switzerland","volume":"6 4","pages":"506-516"},"PeriodicalIF":0.0,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2624-8549/6/4/29/pdf?version=1719305105","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147903764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In-Site Growth of Efficient NiFeOOH/NiFe-LDH Electrodes: A Streamlined One-Step Methodology 高效NiFeOOH/NiFe-LDH电极的现场生长：一种简化的一步法

Chemistry-Switzerland Pub Date : 2024-03-31 DOI: 10.3390/chemistry6020017

Ning Jing, Li Xu, Wei Xu, Guizhen Li, Wen Zhang

引用次数: 6

The Non-Anhydrous, Minimally Basic Synthesis of the Dopamine D₂ Agonist [18F]MCL-524. 多巴胺D2激动剂[18F]MCL-524的非无水、最低碱性合成。

IF 2.1

Chemistry-Switzerland Pub Date : 2021-09-01 Epub Date: 2021-09-09 DOI: 10.3390/chemistry3030075

James A H Inkster, Anna W Sromek, Vamsidhar Akurathi, John L Neumeyer, Alan B Packard

{"title":"The Non-Anhydrous, Minimally Basic Synthesis of the Dopamine D2 Agonist [18F]MCL-524.","authors":"James A H Inkster, Anna W Sromek, Vamsidhar Akurathi, John L Neumeyer, Alan B Packard","doi":"10.3390/chemistry3030075","DOIUrl":"10.3390/chemistry3030075","url":null,"abstract":"The dopamine D2 agonist MCL-524 is selective for the D2 receptor in the high-affinity state (D2high), and, therefore, the PET analogue, [18F]MCL-524, may facilitate the elucidation of the role of D2high in disorders such as schizophrenia. However, the previously reported synthesis of [18F]MCL-524 proved difficult to replicate and was lacking experimental details. We therefore developed a new synthesis of [18F]MCL-524 using a \"non-anhydrous, minimally basic\" (NAMB) approach. In this method, [18F]F- is eluted from a small (10-12 mg) trap-and-release column with tetraethylammonium tosylate (2.37 mg) in 7:3 MeCN:H2O (0.1 mL), rather than the basic carbonate or bicarbonate solution that is most often used for [18F]F- recovery. The tosylated precursor (1 mg) in 0.9 mL anhydrous acetonitrile was added directly to the eluate, without azeotropic drying, and the solution was heated (150 °C/15 min). The catechol was then deprotected with the Lewis acid In(OTf)3 (10 equiv.; 150 °C/20 min). In contrast to deprotection with protic acids, Lewis-acid-based deprotection facilitated the efficient removal of byproducts by HPLC and eliminated the need for SPE extraction prior to HPLC purification. Using the NAMB approach, [18F]MCL-524 was obtained in 5-9% RCY (decay-corrected, n = 3), confirming the utility of this improved method for the multistep synthesis of [18F]MCL-524 and suggesting that it may applicable to the synthesis of other 18F-labeled radiotracers.","PeriodicalId":53216,"journal":{"name":"Chemistry-Switzerland","volume":"3 3","pages":"1047-1056"},"PeriodicalIF":2.1,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10569134/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41219982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

首页上一页