Tetrahedron Green Chem最新文献_第6页

Green and sustainable bio-synthesis of gold nanoparticles using Aspergillus Trinidadensis VM ST01: Heterogeneous catalyst for nitro reduction in water Trinidadensis曲霉VM ST01绿色可持续生物合成纳米金：水中硝基还原的多相催化剂

Tetrahedron Green Chem Pub Date : 2023-08-02 DOI: 10.1016/j.tgchem.2023.100021

Amar G. Deshmukh , Vyoma Mistry , Abhishek Sharma , Paresh N. Patel

{"title":"Green and sustainable bio-synthesis of gold nanoparticles using Aspergillus Trinidadensis VM ST01: Heterogeneous catalyst for nitro reduction in water","authors":"Amar G. Deshmukh , Vyoma Mistry , Abhishek Sharma , Paresh N. Patel","doi":"10.1016/j.tgchem.2023.100021","DOIUrl":"https://doi.org/10.1016/j.tgchem.2023.100021","url":null,"abstract":"<div>In this study, a gold nanoparticles (GNPs) have been successfully fabricated by the bio reduction route using soil extract Aspergillus trinidadensis (VM ST01’ OL587588) fungi as a reducing and capping agent without any solvent interference. The GNPs were grown and stabilized by a two-step one-pot method, without any influence of chemical reactants. Characteristics of prepared GNPs were investigated using various microscopic and spectroscopic techniques. GNPs were roughly spherical in shape. Water dispersion study of GNPs has shown a stable dispersion in a broad range of 2–12 pH. The stirring and precursor salt concentration has influenced the kinetics involved in the fabrication process. Stoichiometric data has shown 3.5 × 1020 gold atoms per gram of biomass with diameters of around 35 nm, as determined with High-Resolution Transmission Electron Microscopy (HR-TEM). Zeta potential and Powder X-Ray Diffraction (P-XRD) studies have elucidated the crystalline nature of GNPs. Presence of participating functional groups were examined with Fourier Transform Infra-Red Spectroscopy (FT-IR). Synthesized GNPs were analyzed for surface morphology by Scanning Electron Microscope (SEM). The thermal stability of the lyophilized GNPs sample and capping of the particle were evaluated with Thermo-Gravimetric Analysis (TGA) and had a residual mass of 25% at 306 °C. The Aspergillus trinidadensis capped GNPs have been demonstrated as an efficient heterogeneous catalyst (AtGNHC) for the reduction of 4-Nitrophenol as a model substrate in water. An isolated yield (>95%) of the reduced product in 4 h has shown the effectiveness of the prepared catalyst.</div>","PeriodicalId":101215,"journal":{"name":"Tetrahedron Green Chem","volume":"2 ","pages":"Article 100021"},"PeriodicalIF":0.0,"publicationDate":"2023-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49730579","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

Manganese-catalysed C2 allylation and deuteration of indoles in water 锰催化C2烯丙化和水中吲哚的氘化

Tetrahedron Green Chem Pub Date : 2023-07-16 DOI: 10.1016/j.tgchem.2023.100019

Si Lok Ko , Eimear Courtney , Dr Mark Light , Dr David Jones , Dr Gerard P. McGlacken

引用次数: 0

Metal-based catalysis for biomass and renewables valorization- current status 金属基催化生物质和可再生能源增值的现状

Tetrahedron Green Chem Pub Date : 2023-07-16 DOI: 10.1016/j.tgchem.2023.100018

Sophiya Babu , Linus Jojo , Albin James , Krishnakumar Melethil , Bejoy Thomas

{"title":"Metal-based catalysis for biomass and renewables valorization- current status","authors":"Sophiya Babu , Linus Jojo , Albin James , Krishnakumar Melethil , Bejoy Thomas","doi":"10.1016/j.tgchem.2023.100018","DOIUrl":"https://doi.org/10.1016/j.tgchem.2023.100018","url":null,"abstract":"<div>Biomass, a renewable and carbon neutral energy source, is highly promising within the upcoming decades for addressing several consumer goods and fuel requirements of humankind. Using catalysts in the biomass valorization industry increases the recyclability of feedstock, offers higher selectivity in products, reduces environmental impact, and controls the reactivity of the procedures. In this review, we have scrutinized the status of the development of multifunctional metal-based catalysts that can help convert various biomass into high-value fine goods. The catalytic systems have been divided into subgroups to deeply study their structural characteristics and active sites towards intrinsic reactivity and selectivity in the transformation of biomass intermediates, which mostly occurs via hydrolysis, dehydration, hydrodeoxygenation, and oxidation pathways In this review, we mainly focus on the role and significance of metal oxide-based catalysts, metal-oxide supported catalysts, heteropoly acids, aluminosilicates, and mesoporous catalysts in biomass valorization. Recent developments in photocatalytic materials for the oxidation of small molecules produced from biomass (such sugars, alcohols, and carboxylic acids) and lignin model compounds are described, as well as the function of various heteroatoms in enhancing photo-electronic characteristics. Bimetallic catalytic systems' acid-base supports and metal nanoparticulate sites work together synergistically to enable one-pot multistep cascade reactions.</div>","PeriodicalId":101215,"journal":{"name":"Tetrahedron Green Chem","volume":"2 ","pages":"Article 100018"},"PeriodicalIF":0.0,"publicationDate":"2023-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49760878","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

Formic acid as renewable reagent and product in biomass upgrading 甲酸作为生物质改性中的可再生试剂和产品

Tetrahedron Green Chem Pub Date : 2023-07-15 DOI: 10.1016/j.tgchem.2023.100020

Mahdi Achour , Débora Álvarez-Hernández , Estela Ruiz-López , Cristina Megías-Sayago , Fatima Ammari , Svetlana Ivanova , Miguel Ángel Centeno

引用次数: 0

Flow chemistry as green technology for the genesis and use of organometallic reagents in the synthesis of key building blocks and APIs – An update 流动化学作为有机金属试剂在关键构建块和原料药合成中的起源和使用的绿色技术——更新

Tetrahedron Green Chem Pub Date : 2023-06-28 DOI: 10.1016/j.tgchem.2023.100015

Philipp Natho, Renzo Luisi

引用次数: 2

Valorisation of terpenes by continuous flow hydrogenation over 3D-printed Palladium catalysts 3d打印钯催化剂上连续流动加氢对萜烯的增值作用

Tetrahedron Green Chem Pub Date : 2023-06-21 DOI: 10.1016/j.tgchem.2023.100014

Ivan Martinez-Botella, Stuart Littler, Milan Kundra, Christian H. Hornung

引用次数: 0

Marine waste derived chitin biopolymer for N-containing supports, catalysts and chemicals 海洋废弃物衍生的甲壳素生物聚合物，用于含氮载体、催化剂和化学品

Tetrahedron Green Chem Pub Date : 2023-06-13 DOI: 10.1016/j.tgchem.2023.100013

Nishita Lucas, Chandrashekhar V. Rode

{"title":"Marine waste derived chitin biopolymer for N-containing supports, catalysts and chemicals","authors":"Nishita Lucas, Chandrashekhar V. Rode","doi":"10.1016/j.tgchem.2023.100013","DOIUrl":"https://doi.org/10.1016/j.tgchem.2023.100013","url":null,"abstract":"<div>Efficacious waste valorisation is a promising strategy towards sustainability. Marine waste which was undervalued and underutilized for a long time has attracted attention recently to realize its economic value to meet the sustainable development requirements. Chitin, a naturally occurring nitrogen-rich marine biopolymer has tremendous potential for material synthesis and chemical production. The current review is focussed on highlighting the effectiveness of chitin from a catalytic perspective. Unlike chitosan, the usage of chitin for constructing catalyst has not been demonstrated thoroughly. Thus, the present study exhibits strategical chemical modification of chitin, its conversion to N-doped carbon materials as efficient catalyst for various transformation. Advancements on deriving organo-nitrogen chemicals catalytically from chitin has also been discussed. Through these two aspects the potency of chitin as a sustainable candidate for catalysis is projected. Finally, challenges and prospects are accessed to enhance the production of valuable chemicals/materials from chitin biomass via greener protocols.</div>","PeriodicalId":101215,"journal":{"name":"Tetrahedron Green Chem","volume":"2 ","pages":"Article 100013"},"PeriodicalIF":0.0,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49730808","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

Piperazine-Amberlyst®15-catalysed synthesis of 2-amino-4H-chromenes, chromeno[2,3-b]pyridines and chromeno[2,3-d]pyrimidines 哌嗪Amberlyst®15催化合成2-氨基-4H-色烯、色烯并[2,3-b]吡啶和色烯并[3,3-d]嘧啶

Tetrahedron Green Chem Pub Date : 2023-01-01 DOI: 10.1016/j.tgchem.2023.100011

Giovanna Bosica, Roderick Abdilla

{"title":"Piperazine-Amberlyst®15-catalysed synthesis of 2-amino-4H-chromenes, chromeno[2,3-b]pyridines and chromeno[2,3-d]pyrimidines","authors":"Giovanna Bosica, Roderick Abdilla","doi":"10.1016/j.tgchem.2023.100011","DOIUrl":"https://doi.org/10.1016/j.tgchem.2023.100011","url":null,"abstract":"<div>Chromenes, biologically-active scaffolds, and their variants have been often synthesized by the combination of salicylaldehyde, malononitrile, and nucleophilic species (indoles, naphthols, nitro compounds, thiols). Whereas this combination furnishes specifically 2-amino-4H-chromenes, other related compounds such as chromeno[2,3-b]pyridines and chromeno[2,3-d]pyrimidines may be also attained using similar readily available reactants: salicylaldehyde, two equivalents of malononitrile and a thiol for the former and malononitrile, two salicylaldehyde equivalents and an amine for the latter. To the best of our knowledge, there are no reported studies which have attempted to synthesize these products using the same catalyst. Hence, the aim of the below study was to find a cheap and recyclable catalyst that would be able to drive the synthesis of all three products. Positively, piperazine supported on the polymeric sulfonic acid resin Amberlyst® 15 was found to be an inexpensive and easily-prepared novel catalyst that could be used to synthesize all three derivatives (33 examples, 18–82%) in fairly good yields whilst also being recyclable and reusable (for up to four or five runs).</div>","PeriodicalId":101215,"journal":{"name":"Tetrahedron Green Chem","volume":"1 ","pages":"Article 100011"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49730807","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: 2

Welcome to Tetrahedron Green Chem 欢迎来到四面体绿色化学

Tetrahedron Green Chem Pub Date : 2023-01-01 DOI: 10.1016/j.tgchem.2023.100017

引用次数: 0

Solvent-free synthesis of nanostructured TiO2 in a continuous flow spinning disc reactor for application to photocatalytic reduction of CO2 在连续流动旋转圆盘反应器中无溶剂合成纳米结构TiO2用于光催化还原CO2

Tetrahedron Green Chem Pub Date : 2023-01-01 DOI: 10.1016/j.tgchem.2023.100007

Abdullahi Adamu, Fernando Russo Abegão, Kamelia Boodhoo

{"title":"Solvent-free synthesis of nanostructured TiO2 in a continuous flow spinning disc reactor for application to photocatalytic reduction of CO2","authors":"Abdullahi Adamu, Fernando Russo Abegão, Kamelia Boodhoo","doi":"10.1016/j.tgchem.2023.100007","DOIUrl":"https://doi.org/10.1016/j.tgchem.2023.100007","url":null,"abstract":"<div>Nanostructured TiO2 catalysts were synthesised via the sol-gel method using solvent-free titanium (IV) n-butoxide and acidified water at pH 1 in a continuous flow spinning disc reactor (SDR). The influence of disc rotational speed, total flow rate of the reagents, and molar hydrolysis ratio (molar ratio of the acidified water to the titanium (IV) n-butoxide) on the particle size, phase distribution, band gap energy and photocatalytic activity for CO2 reduction was studied. Increasing the disc rotational speed from 400 rpm to 1400 rpm results in highly sheared, uniformly mixed thin films where small particles (up to ca. 40 nm mean diameter) with narrow particle size distribution (polydispersity index of up to 0.5) are formed even at the lower molar hydrolysis ratio of 113. Increasing the molar hydrolysis ratio from 113 to 301 favours anatase phase transformation to rutile phase, thus improving photocatalytic activity. Larger TiO2 particles from the SDR are associated with an increase in their band gap energy whilst doping with copper narrows the band gap energy from 3.00 eV down to 2.53 eV.The photocatalytic performance of the TiO2 nanoparticles was evaluated for CO2 reduction in the form of bicarbonate ions using a meso-structured photocatalytic reactor at a TiO2 loading of 0.5 g L-1 and flow rate of 4 mL min-1. A formate production rate of 500 μmol g-1 h-1 is achieved after 2 h of irradiation (λ = 254 nm) on a bare TiO2 catalyst, with no apparent trend observed with SDR operating conditions used in the production of the nanoparticles. However, for copper-doped TiO2, there is a clear correlation between the anatase to rutile ratio and formate production rate.</div>","PeriodicalId":101215,"journal":{"name":"Tetrahedron Green Chem","volume":"1 ","pages":"Article 100007"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49730320","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: 2