发布求助
文献互助 智能选刊 最新文献

Organics最新文献

筛选
英文 中文
Investigation on Porous Carbon-Loaded MnO for Removing Hexavalent Chromium from Aqueous Solution 多孔载碳MnO去除六价铬的研究
Organics Pub Date : 2025-08-12 DOI: 10.3390/org6030036
Liping Wang, Mingyu Zhang
{"title":"Investigation on Porous Carbon-Loaded MnO for Removing Hexavalent Chromium from Aqueous Solution","authors":"Liping Wang, Mingyu Zhang","doi":"10.3390/org6030036","DOIUrl":"https://doi.org/10.3390/org6030036","url":null,"abstract":"Porous carbon-loaded MnO was prepared via a combination of the sol–gel method and the chemical blow molding method using polyvinylpyrrolidone (PVP) and manganese nitrate as starting materials. SEM, EDX, TEM, FTIR, XRD, XPS, nitrogen adsorption–desorption, and elemental analysis were used to assess its physical and chemical characteristics. Furthermore, the adsorption property of porous carbon-loaded MnO for hexavalent chromium (Cr(VI)) in polluted water was investigated in detail. The results demonstrated that large numbers of MnO nanoparticles were evenly mounted on the surfaces of carbon walls, with a uniform distribution of C, N, and O elements. The BET surface area was 46.728 m2/g, and the pore sizes of porous carbon ranged from 2 nm to 10 nm. Additionally, abundant surface functional groups were found in porous carbon-loaded MnO, a result consistent with XPS data and applicable to the adsorption of heavy metals from aqueous solutions containing Cr(VI). The Freundlich model fitted the adsorption isotherm well, and the pseudo−second−order model precisely matched the adsorption kinetics. According to the study results, the adsorption was multilayer, and the adsorption process involved an endothermic reaction. These results indicate that this is a feasible way to synthesize a high−efficiency adsorbent for the removal of harmful heavy−metal ions from wastewater.","PeriodicalId":489409,"journal":{"name":"Organics","volume":"6 3","pages":"36-36"},"PeriodicalIF":0.0,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2673-401X/6/3/36/pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147896621","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
Lewis Acid-Initiated Ring-Opening Reactions of Five- and Six-Membered Cyclic Ethers Based on the Oxonium Ylide Intermediates 路易斯酸引发的基于羰基酰亚胺中间体的五元和六元环醚开环反应
Organics Pub Date : 2024-07-22 DOI: 10.3390/org5030011
Dandan Jiang, Jun Xiao, Yingzhen Zhang, Kunming Liu, Juanhua Li, Jinbiao Liu
{"title":"Lewis Acid-Initiated Ring-Opening Reactions of Five- and Six-Membered Cyclic Ethers Based on the Oxonium Ylide Intermediates","authors":"Dandan Jiang, Jun Xiao, Yingzhen Zhang, Kunming Liu, Juanhua Li, Jinbiao Liu","doi":"10.3390/org5030011","DOIUrl":"https://doi.org/10.3390/org5030011","url":null,"abstract":"In light of the small ring strain of five/six-membered cyclic ethers, constructing complex molecules via ring-opening reactions has consistently been a highly challenging topic in organic synthesis. Induced by Lewis acids, the charge redistribution in cyclic ethers forms oxonium ylide intermediates, thereby activating the C–O bond and subsequently facilitating nucleophilic attack for ring opening. In recent years, a variety of novel Lewis acids, encompassing those with new metal centers and frustrated Lewis pairs (FLPs), have been effectively utilized to induce the formation of oxonium ylides, offering a diverse array of methods for the ring opening of five/six-membered cyclic ethers. This review conveys the extensive application advancements of diverse Lewis acid types for cyclic ether ring-opening reactions over the past two decades, originating from the perspective of the classification of Lewis acids. Furthermore, the substrate applicability and chemical transformation efficiency of these Lewis acids in the ring-opening reactions of cyclic ethers have also been discussed herein.","PeriodicalId":489409,"journal":{"name":"Organics","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141815072","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
Architecture of Molecular Logic Gates: From Design to Application as Optical Detection Devices 分子逻辑门的结构：从设计到作为光学检测设备的应用
Organics Pub Date : 2024-06-06 DOI: 10.3390/org5020008
Gleiston G. Dias, F. T. Souto
{"title":"Architecture of Molecular Logic Gates: From Design to Application as Optical Detection Devices","authors":"Gleiston G. Dias, F. T. Souto","doi":"10.3390/org5020008","DOIUrl":"https://doi.org/10.3390/org5020008","url":null,"abstract":"Three decades after A. P. de Silva’s seminal paper introduced the concept of logic gates at the molecular level, the field of molecular logic gates (MLGs) has witnessed significant advancements. MLGs are devices designed to perform logical operations, utilizing one or more physical or chemical stimulus signals (inputs) to generate an output response. Notably, MLGs have found diverse applications, with optical detection of analytes emerging as a notable evolution of traditional chemosensors. Organic synthesis methods are pivotal in crafting molecular architectures tailored as optical devices capable of analyte detection through logical functions. This review delves into the fundamental aspects and physical–chemical properties of MLGs, with a particular emphasis on synthetic strategies driving their design.","PeriodicalId":489409,"journal":{"name":"Organics","volume":"109 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141377698","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
How Much Potential Do Nucleoside Analogs Offer to Combat Human Corona Viruses? 核苷类似物在抗击人类日冕病毒方面有多大潜力？
Organics Pub Date : 2024-05-08 DOI: 10.3390/org5020006
W. Buchowicz, Mariola Koszytkowska-Stawińska
{"title":"How Much Potential Do Nucleoside Analogs Offer to Combat Human Corona Viruses?","authors":"W. Buchowicz, Mariola Koszytkowska-Stawińska","doi":"10.3390/org5020006","DOIUrl":"https://doi.org/10.3390/org5020006","url":null,"abstract":"Nucleoside analogs (NAs) have been extensively examined as plausible antiviral agents in recent years, in particular since the outbreak of the global pandemic of COVID-19 in 2019. In this review, the structures and antiviral properties of over 450 NAs are collected according to the type of virus, namely SARS-CoV, SARS-CoV-2, MERS-CoV, HCoV-OC43, HCoV-229E, and HCoV-NL63. The activity of the NAs against HCoV-related enzymes is also presented. Selected studies dealing with the mode of action of the NAs are discussed in detail. The repurposing of known NAs appears to be the most extensively investigated scientific approach towards efficacious anti-HCoV agents. The recently reported de novo-designed NAs seem to open up additional approaches to new drug candidates.","PeriodicalId":489409,"journal":{"name":"Organics","volume":" 42","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140998395","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
Supramolecular Catalysis with Chiral Mono- and Bis-(Thio)Urea-Derivatives 手性单-和双-（硫代）脲衍生物的超分子催化作用
Organics Pub Date : 2024-03-26 DOI: 10.3390/org5020003
Veronica Iuliano, Paolo Della Sala, Carmen Talotta, M. De Rosa, C. Gaeta, P. Neri, A. Soriente
{"title":"Supramolecular Catalysis with Chiral Mono- and Bis-(Thio)Urea-Derivatives","authors":"Veronica Iuliano, Paolo Della Sala, Carmen Talotta, M. De Rosa, C. Gaeta, P. Neri, A. Soriente","doi":"10.3390/org5020003","DOIUrl":"https://doi.org/10.3390/org5020003","url":null,"abstract":"Chiral mono- and bis-(thio)urea supramolecular organocatalysts were studied in the enantioselective vinylogous addition reaction of 2-trimethylsilyloxyfuran (TMSOF) to carbonylic compounds; the corresponding chiral γ-hydroxymethyl-butenolides are obtained in good yields and with high enantiomeric excesses. The catalyst structure, as well as the reaction conditions, strongly influence the efficiency of the reaction. The conformational features of mono(thio)urea catalysts 2 and 3 and bis(thio)urea catalysts 7 and 8 were investigated by DFT calculations along with the structure of their complexes with benzaldehyde. Natural Bond Orbital (NBO) and Non-Covalent Interaction (NCI) calculations provided useful information concerning the activating H-bonding interactions in the complexes.","PeriodicalId":489409,"journal":{"name":"Organics","volume":"118 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140379967","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
4-Hydroxy-2-pyrones: Synthesis, Natural Products, and Application 4-Hydroxy-2-pyrones：合成、天然产品和应用
Organics Pub Date : 2023-12-15 DOI: 10.3390/org4040037
V. V. Fedin, D. L. Obydennov, Sergei A. Usachev, V. Sosnovskikh
{"title":"4-Hydroxy-2-pyrones: Synthesis, Natural Products, and Application","authors":"V. V. Fedin, D. L. Obydennov, Sergei A. Usachev, V. Sosnovskikh","doi":"10.3390/org4040037","DOIUrl":"https://doi.org/10.3390/org4040037","url":null,"abstract":"4-Hydroxy-2-pyrones are of interest as potential biorenewable molecules for a sustainable transition from biomass feedstock to valuable chemical products. This review focuses on the methodologies for the synthesis of 4-hydroxy-2-pyrones published over the last 20 years. These pyrones as polyketides are widespread in Nature and possess versatile bioactivity that makes them an attractive target for synthesis and modification. Biosynthetic paths of the pyrones are actively developed and used as biotechnological approaches for the construction of natural and unnatural polysubstituted 4-hydroxy-2-pyrones. The major synthetical methods are biomimetic and are based on the cyclization of tricarbonyl compounds. Novel chemical methods of de novo synthesis based on alkyne cyclizations using transition metal complexes and ketene transformations allow for straightforward access to 4-hydroxy-2-pyrones and have been applied for the construction of natural products. Possible directions for further pyrone ring modification are discussed.","PeriodicalId":489409,"journal":{"name":"Organics","volume":"2 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139000069","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
Synthesis of Antifungal Heterocycle-Containing Mannich Bases: A Comprehensive Review 抗真菌杂环曼尼希碱的合成综述
Organics Pub Date : 2023-11-09 DOI: 10.3390/org4040035
Diego Quiroga, Ericsson Coy-Barrera
{"title":"Synthesis of Antifungal Heterocycle-Containing Mannich Bases: A Comprehensive Review","authors":"Diego Quiroga, Ericsson Coy-Barrera","doi":"10.3390/org4040035","DOIUrl":"https://doi.org/10.3390/org4040035","url":null,"abstract":"Mannich bases are a class of organic compounds usually obtained by the condensation reaction between an amine, a compound with active hydrogens, and an aldehyde. They are versatile intermediates in organic synthesis, and those compounds containing this motif find applications in pharmaceutical, agrochemical, and even material fields since they are widely known for their wide range of biological activities, including antimicrobial properties. Thus, as part of our interest in antifungal agents, this narrative review aimed to gather information from the literature on the synthesis of various representative Mannich-base-containing compounds, particularly centered on those exhibiting antifungal properties. In this context, the compilation indicated that Mannich bases could be considered as a relevant toxophore/pharmacophore by incorporating heterocyclic moieties to be implemented for the design of new antifungal agents, given its proven efficacy against phytopathogens, other opportunistic human pathogens, and some dermatophytic fungal species, which can be further exploited as agrochemical agents or in medicinal applications to treat fungal infections. The antifungal effect exhibited by Mannich bases conjugated with oxa and/or aza-heterocycles suggests that compounds that have a heterocyclic system attached to the β-amino core are attractive alternatives oriented to the synthesis of novel and helpful antifungal agents.","PeriodicalId":489409,"journal":{"name":"Organics","volume":" 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135241443","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
Absorption Spectra of Protonated Corroles: Two Distinct Patterns Due to Peripheral Substitution Architecture 质子化产物的吸收光谱:由于外周取代结构的两种不同模式
Organics Pub Date : 2023-10-09 DOI: 10.3390/org4040034
Lev L. Gladkov, Dmitry V. Klenitsky, Mikalai M. Kruk
{"title":"Absorption Spectra of Protonated Corroles: Two Distinct Patterns Due to Peripheral Substitution Architecture","authors":"Lev L. Gladkov, Dmitry V. Klenitsky, Mikalai M. Kruk","doi":"10.3390/org4040034","DOIUrl":"https://doi.org/10.3390/org4040034","url":null,"abstract":"The origin of individual features in the ground state absorption spectra of two protonated corroles differing in the architecture of peripheral substitution (either Cm-aryl or Cb-alkyl) have been studied in detail with the ground state absorption spectroscopy and density functional theory calculations. The geometry optimization, molecular orbitals and absorption spectra calculation have been carried out. It was found that protonation leads to the saddle type macrocycle conformation in contrast with the wave type conformation known for the parent-free base corroles. The mean plane deviation parameter Δ23 for the macrocycle, pyrrole tilting angles and the degree of pyramidalization λ2 of all four pyrrole nitrogens was found to depend on the peripheral substitution architecture. Macrocycle conformation of the protonated forms has distinct asymmetrical features which are reflected by the sets of values of the tilting angles and values of pyramidalization degree. The pair of pyrroles B and C has smaller tilting angles and higher pyramidalization degree values, whereas the opposite trend was found for the pair of pyrroles A and D. Electronic effects and structural differences induced by substitution lead to the pronounced shifts of the molecular orbitals. In the Cb-alkylated corrole, almost-degenerated HOMO and HOMO-1 molecular orbitals lead to enhancement of the configuration interaction. As a result, the Qx transition oscillator strength goes down, becoming comparable to that of the Qy one. A large HOMO-HUMO-1gap in the Cm-aryl corrole minimizes the configuration interaction, giving rise to Qx band domination in the visible range spectrum.","PeriodicalId":489409,"journal":{"name":"Organics","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135092947","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 Application of Alkoxy Radical in Organic Synthesis 烷氧基自由基在有机合成中的应用进展
Organics Pub Date : 2023-09-28 DOI: 10.3390/org4040033
Munsaf Ali, Shi Sewell, Juncheng Li, Ting Wang
{"title":"Recent Advances in Application of Alkoxy Radical in Organic Synthesis","authors":"Munsaf Ali, Shi Sewell, Juncheng Li, Ting Wang","doi":"10.3390/org4040033","DOIUrl":"https://doi.org/10.3390/org4040033","url":null,"abstract":"Alkoxy radicals have been identified as versatile intermediates in synthetic chemistry in the last few decades. Over the last decade, various catalytic processes for the in situ generation of alkoxy radicals have been explored, leading to the development of new synthetic methodologies based on alkoxy radicals. In this review, we provided a comprehensive review of recent developments in the utilization of alkoxy radicals in diverse organic transformations, natural product synthesis, and the late-stage modification of bioactive molecules through the implementation of the photoredox methodology.","PeriodicalId":489409,"journal":{"name":"Organics","volume":"236 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135388794","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
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信
小红书