ChemistrySelect最新文献_第3页

Sequential Decarboxylation, Substitution, Cyclization and Oxidation with Iodine-DMSO Catalytic System: A New Methodology for the Construction of Imidazoquinoxaline Motifs 碘-二甲基亚砜催化体系的顺序脱羧、取代、环化和氧化：构建咪唑喹喔啉基团的新方法

IF 1.9 4区化学

ChemistrySelect Pub Date : 2024-11-18 DOI: 10.1002/slct.202404332

Yakkanti Chiranjeevi, Ganta Ravi Kumar, Lakinani Vaikunta Rao, Srinuvasarao Golagani, Gorle Simhachalam, Apuri Satyender

引用次数: 0

Synthesis of Oxazolines using Aldol/Cyclization Cascade Reactions Employing 1,1-Diaminobenzalazine as Organocatalyst 以 1,1-二氨基苯并恶嗪为有机催化剂，利用醛醇/环化级联反应合成恶唑啉类化合物

IF 1.9 4区化学

ChemistrySelect Pub Date : 2024-11-18 DOI: 10.1002/slct.202405002

Kriti Mehta, Aabid A. Wani, Subhash C. Sahoo, Prasad V. Bharatam

引用次数: 0

Core-shell Structured Nano CuO@CER Composites for the Photoelectrocatalytic Degradation of Methylene Blue 用于光电催化降解亚甲基蓝的核壳结构纳米 CuO@CER 复合材料

IF 1.9 4区化学

ChemistrySelect Pub Date : 2024-11-18 DOI: 10.1002/slct.202403754

Guanyu Liang, Prof. Ying Wang, Xinyu Dong, Prof. Fen Xu

{"title":"Core-shell Structured Nano CuO@CER Composites for the Photoelectrocatalytic Degradation of Methylene Blue","authors":"Guanyu Liang, Prof. Ying Wang, Xinyu Dong, Prof. Fen Xu","doi":"10.1002/slct.202403754","DOIUrl":"https://doi.org/10.1002/slct.202403754","url":null,"abstract":"The composite material of nano CuO loaded on ion exchange resin (CuO@CER) as the carrier was prepared successfully by constant temperature oscillation and hydrothermal synthesis methods. It was applied to the photoelectrocatalytic degradation of methylene blue (MB) as an organic pollutant, and further to explore the optimal conditions for CuO@CER photoelectrocatalytic degradation of MB. The results showed that the composite material had a typical core-shell structure, and the nano CuO loaded on the ion exchange resin had good crystallinity and high purity. CuO@CER exhibited excellent photocatalytic and photoelectrocatalytic performance towards MB, with degradation rates of 92.02% and 95.20% in 70 min under their respective optimal reaction conditions. Furthermore, the photoelectrocatalytic stability of CuO@CER was good relatively, and the degradation rates of MB exceeded 96% after 5 cycles of photoelectrocatalytic experiments. Free radical quenching experiments indicated that superoxide radicals were the main active groups during the photoelectrocatalysis. Additionally, the mechanism of photocatalytic degradation for MB under the electric field was briefly analyzed. This study will provide technical support for the photoelectrocatalytic degradation of organic dye wastewater.","PeriodicalId":146,"journal":{"name":"ChemistrySelect","volume":"9 44","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142666127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fluoride Ions Sequestration From Contaminated Water Using PVA-Agar-Based Green Anion-Exchanger 利用基于 PVA-Agar 的绿色阴离子交换器螯合受污染水中的氟离子

IF 1.9 4区化学

ChemistrySelect Pub Date : 2024-11-18 DOI: 10.1002/slct.202403080

Balram, Balbir Singh Kaith

{"title":"Fluoride Ions Sequestration From Contaminated Water Using PVA-Agar-Based Green Anion-Exchanger","authors":"Balram, Balbir Singh Kaith","doi":"10.1002/slct.202403080","DOIUrl":"https://doi.org/10.1002/slct.202403080","url":null,"abstract":"The current work is focused on the designing of a green interpenetrating polymer network (IPN) PA@polyAAm:AN using polyvinyl alcohol-agar hybrid backbone and its subsequent conversion into an anion-exchanger PA@polyAAm:AN-AE through reduction of nitrile group in presence of LiAlH4. Further, the reduced form of IPN was quaternized using methyl iodide so that anion to anion exchange could take place between F− and I− anions. The primary objective of synthesizing an anion-exchanger was to eliminate F− ions from contaminated water through the utilization of a prepared device. During the optimization of different experimental parameters for getting the optimal anion-exchange capacity (AEC), the favorable conditions found were: pH, 9.0; contact period, 120 min; adsorbent dosage, 30 mg and initial F− ion concentration, 8.0 mg L−1. The pseudo-second order kinetic model best described the F− ions adsorption kinetics, with a 0.97 R2 value. The rate constant (KF) was found to be 2.3, which further supported the validity of the Freundlich isotherm. Thus, the current study has remarkable potential with a 79.99% adsorption capacity for eliminating F− ions. Moreover, the ecofriendly anion-exchanger prepared was found effective in the removal of F− ions from aqueous medium up to four cycles during reusability analysis.","PeriodicalId":146,"journal":{"name":"ChemistrySelect","volume":"9 44","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142666019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","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 Development of Bioactive Fluorinated Pyrazole Derivatives: A Review 开发具有生物活性的氟化吡唑衍生物的最新进展：综述

IF 1.9 4区化学

ChemistrySelect Pub Date : 2024-11-15 DOI: 10.1002/slct.202403478

Priyesh H. Amin, Rajesh H. Vekariya, Sureshkumar K. Dhakhda

引用次数: 0

Synthesis of Substituted N'-(3,5,6,7,8-Pentafluoro-1,4-Dioxo-1,4-Dihydronaphthalen-2-yl)Hydrazides by Condensation of Acyl Hydrazines and Perfluoro-1,4-Naphthoquinone 酰基肼与全氟-1,4-萘醌缩合合成取代的 N'-(3,5,6,7,8-五氟-1,4-二氧代-1,4-二氢萘-2-基)酰肼

IF 1.9 4区化学

ChemistrySelect Pub Date : 2024-11-15 DOI: 10.1002/slct.202404996

Ekaterina N. Kudryavtseva, Boris V. Lichitsky, Evgeny V. Tretyakov

{"title":"Synthesis of Substituted N'-(3,5,6,7,8-Pentafluoro-1,4-Dioxo-1,4-Dihydronaphthalen-2-yl)Hydrazides by Condensation of Acyl Hydrazines and Perfluoro-1,4-Naphthoquinone","authors":"Ekaterina N. Kudryavtseva, Boris V. Lichitsky, Evgeny V. Tretyakov","doi":"10.1002/slct.202404996","DOIUrl":"https://doi.org/10.1002/slct.202404996","url":null,"abstract":"The reaction of different acyl hydrazines with hexafluoro-1,4-napthoquinone was studied for the first time. It was demonstrated that this interaction stops at the substitution of one fluorine atom in the quinone moiety. Based on the observed reaction, a general approach to the synthesis of different pentafluoro-1,4-dioxo-1,4-dihydronaphthalen-2-yl hydrazides was developed. It was revealed that optimal conditions for the condensation of hexafluoro-1,4-napthoquinone with hydrazides are reflux in MeOH for 0.25 h; note, the protocol does not require any chromatographic purification of the target products. The method is versatile and makes it possible to prepare products containing various substituents in the aryl part of the molecule. In addition, alkyl and heteroaryl hydrazides can be employed as starting compounds too, and the presence of hydroxy and cyano groups in the applied acyl hydrazines does not interfere with the condensation. The structure of one of the obtained products, namely 4-chloro-N□-(3,5,6,7,8-pentafluoro-1,4-dioxo-1,4-dihydronaphthalen-2-yl)benzohydrazide, was confirmed by X-ray diffraction. In crystals of this hydrazide, both NH groups form intermolecular hydrogen bonds that give rise to layers lying in the [001] plane. Prepared N'-(3,5,6,7,8-pentafluoro-1,4-dioxo-1,4-dihydronaphthalen-2-yl)hydrazides are of interest as redox-active ligands and precursors for obtaining a wide range of functionalized 1,4-napthoquinones for medicine chemistry.","PeriodicalId":146,"journal":{"name":"ChemistrySelect","volume":"9 43","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142642136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cellulose Composite Aerogels with High Adsorption Capacity and Recyclability for Dye Removal 用于去除染料的高吸附容量和可回收性纤维素复合气凝胶

IF 1.9 4区化学

ChemistrySelect Pub Date : 2024-11-15 DOI: 10.1002/slct.202402801

Yang Li, Zhongming Liu, Shoujuan Wang, Fangong Kong

{"title":"Cellulose Composite Aerogels with High Adsorption Capacity and Recyclability for Dye Removal","authors":"Yang Li, Zhongming Liu, Shoujuan Wang, Fangong Kong","doi":"10.1002/slct.202402801","DOIUrl":"https://doi.org/10.1002/slct.202402801","url":null,"abstract":"Cellulose-based “biomass” adsorptive materials have gained significant attention because of their effectiveness in various applications. In this study, a cellulose composite aerogel with a rich three-dimensional network structure, low density, and high porosity was successfully obtained by the in situ self-polymerization of dopamine (DA) and acrylamide (AM) in an alkaline urine system. Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, elemental analysis, and other analytical techniques were used to analyze the physical and chemical structures of the cellulose composite aerogels. The results revealed that the introduction of DA and AM into the aerogel enhanced the adsorption and mechanical properties of the active sites, thereby boosting adsorption capacity and recyclability. By optimizing the adsorption of methylene blue (MB) dye using a cellulose composite aerogel, a maximum adsorption capacity of 406.89 mg g was obtained. The MB dye adsorption curve of the cellulose composite aerogel conformed to the Langmuir model, which indicates high adsorption capacity and recyclability. This confirms the high application potential of the cellulose composite aerogel in wastewater treatments.","PeriodicalId":146,"journal":{"name":"ChemistrySelect","volume":"9 43","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142642138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Urease Immobilization with Affinity Based Hybrid Nanopolymeric Membranes 利用基于亲和力的混合纳米聚合物膜固定尿素酶

IF 1.9 4区化学

ChemistrySelect Pub Date : 2024-11-15 DOI: 10.1002/slct.202403297

Cansu İlke Kuru-Sumer, Fulden Ulucan-Karnak, Sinan Akgöl

{"title":"Urease Immobilization with Affinity Based Hybrid Nanopolymeric Membranes","authors":"Cansu İlke Kuru-Sumer, Fulden Ulucan-Karnak, Sinan Akgöl","doi":"10.1002/slct.202403297","DOIUrl":"https://doi.org/10.1002/slct.202403297","url":null,"abstract":"Affınity based hybrid nanopolymeric membranes were developed in this work as a support material to immobilize urease. The hybrid membrane exhibits the desired characteristics and has potential applications in biotechnological and biomedical processes, particularly in artificial kidney devices that remove urea from blood. In this study, it was aimed to embed p(GMA) (glycidylmethacrylate) nanoparticles into HEMA(2-hydroxyethylmethacrylate) membranes and use them in urease enzyme immobilization. First, p(GMA) nanoparticles were synthesized with surfactant-free emulsion polymerization method. Then, a hybrid affinity system was developed by embedding p(GMA) nanoparticles in the p(HEMA) polymeric membranes synthesized by the free radical photopolymerization method. Following the characterization studies with dry mass analysis, scanning electron microscopy (SEM) analysis, Fourier-transform infrared spectroscopy (FTIR) analysis, Brunauer–Emmett–Teller (BET) analysis, surface area calculations, and swelling tests of the hybrid membranes, and conditions (pH, temperature, and concentration) were optimized for urease immobilization. Urease was immobilized onto p(GMA) nanoparticles embedded in p(HEMA) hybrid membranes via adsorption. The maximum urease immobilization capacity of the p(GMA) nanoparticles embedded in p(HEMA) hybrid membranes was 31.85 µg/g. The hybrid membrane exhibits the desired characteristics and has potential applications in biotechnological and biomedical processes, particularly in artificial kidney devices that remove urea from blood.","PeriodicalId":146,"journal":{"name":"ChemistrySelect","volume":"9 43","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142642126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Comparative Study of Green and Chemically Prepared PEGylated Zinc Sulfide Nanoparticles (ZnS-NPs) for Biological Applications 用于生物应用的绿色和化学制备的 PEG 化硫化锌纳米粒子 (ZnS-NPs) 的比较研究

IF 1.9 4区化学

ChemistrySelect Pub Date : 2024-11-15 DOI: 10.1002/slct.202403736

Zia ur Rehman, Muhammad Aslam Khan, Nouman Rasheed Jathoi, Usama Rasool, Khalid S Almaary, Needa A. Bahkali, Junaid Ihsan, Syed Ali Imran Bokhari

{"title":"A Comparative Study of Green and Chemically Prepared PEGylated Zinc Sulfide Nanoparticles (ZnS-NPs) for Biological Applications","authors":"Zia ur Rehman, Muhammad Aslam Khan, Nouman Rasheed Jathoi, Usama Rasool, Khalid S Almaary, Needa A. Bahkali, Junaid Ihsan, Syed Ali Imran Bokhari","doi":"10.1002/slct.202403736","DOIUrl":"https://doi.org/10.1002/slct.202403736","url":null,"abstract":"This study compares chemical and green synthesized zinc sulfide nanoparticles for multiple biological properties. A chemical synthesis approach is utilized to synthesize PEGylated ZnS-NPs while the bulbs of Fritillariae cirrhosae bulbus are utilized for green synthesis. After extensive characterization, the NPs are examined for multifunctional biological properties such as antimicrobial, antioxidant, in vitro anticancer, and blood compatibility. Our study found that chemical synthesis results in higher yield and better dispersion behavior. However, the green ZnS-NPs possessed increased antibacterial and antiparasitic potential against Leishmania tropica as the NPs resulted in significant inhibition against Staphylococcus aureus (S. aureus) and Bacillus subtilis (B. subtilis) with minimum inhibitory concentration (MIC) of 0.156 and 0.312 mg/mL, respectively while IC50 of 115.21 and 128.5 µg/mL were observed for the promastigote and amastigote forms of parasite. Furthermore, Fritillaria cirrhosa (F. cirrhosa) synthesized NPs possessed slightly improved antioxidant properties and in vitro anticancer potential against MCF-7 breast cancer cells. Despite differences in the biological properties, the NPs did not result in hemolytic behavior thus demonstrating the compatible nature against blood cells. It was thus evident from the present study that the chemical and green synthesis techniques not only result in NPs with different physicochemical characteristics but also significantly influence the bio-interaction of the obtained ZnS-NPs.","PeriodicalId":146,"journal":{"name":"ChemistrySelect","volume":"9 43","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142642129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photosensitized 1,2-Sulfonylamination of Alkenes With Sulfonylamide 烯与磺酰胺的光敏化 1,2 磺化反应

IF 1.9 4区化学

ChemistrySelect Pub Date : 2024-11-15 DOI: 10.1002/slct.202404815

Zhi-Jun Chen, Cong Huang, Zhen-Zhen Xie, Zhu-Jun Wang, Yu Zheng, Hao-Yue Xiang, Kai Chen, Hua Yang

引用次数: 0