Tetrahedron Green Chem最新文献_第4页

Optical, dye degradation, and electrochemical sensor studies of CeO2 and CuO nanoparticles by pomegranate peel 用石榴皮制备CeO2和CuO纳米颗粒的光学、染料降解和电化学传感器研究

Tetrahedron Green Chem Pub Date : 2025-06-01 Epub Date: 2025-04-10 DOI: 10.1016/j.tgchem.2025.100077

A. Harshavardhan , V.B. Nagaveni , H. Madhu

{"title":"Optical, dye degradation, and electrochemical sensor studies of CeO2 and CuO nanoparticles by pomegranate peel","authors":"A. Harshavardhan , V.B. Nagaveni , H. Madhu","doi":"10.1016/j.tgchem.2025.100077","DOIUrl":"10.1016/j.tgchem.2025.100077","url":null,"abstract":"<div><div>This study presents a comparative investigation of cerium oxide (CeO<sub>2</sub>) and copper oxide (CuO) nanoparticles synthesized via the solution combustion method (SCM) using pomegranate peel as a green fuel. The synthesized materials were systematically characterized for their structural, morphological, optical, and electrochemical properties using XRD, SEM, UV–Vis spectroscopy, FTIR, and CV techniques. Optical studies were analyzed to understand their functional behaviour, including transmittance, refractive index, dielectric constant, optical conductivity, and absorption coefficient.</div><div>The photocatalytic potential of CeO<sub>2</sub> and CuO was evaluated for the degradation of malachite green under UV light, achieving degradation efficiencies of 97.4 % and 91.56 %, respectively, following first-order kinetics. Additional photocatalytic performance parameters such as half-life (T<sub>1</sub>/<sub>2</sub>), total organic carbon (TOC) removal, pH dependence, scavenger effects, and recyclability were systematically studied. Electrochemical investigations were conducted using a nickel mesh electrode, revealing redox behaviour in 1 M NaOH through cyclic voltammetry (CV) with specific capacitances of 95 F/g (CeO<sub>2</sub>) and 64 F/g (CuO). Diffusion coefficients were determined as 4.365 × 10<sup>−5</sup> cm<sup>2</sup>/s for CeO<sub>2</sub> and 3.137 × 10<sup>−5</sup> cm<sup>2</sup>/s for CuO. Furthermore, via CV analysis, CeO<sub>2</sub> and CuO were explored as electrochemical sensors for heavy metal detection, demonstrating sensitivity towards mercury (Hg) and cadmium (Cd) in the 1–5 mM range.</div><div>This work highlights the dual functionality of CeO<sub>2</sub> and CuO nanoparticles as effective photocatalysts and electrochemical sensors, offering promising applications in environmental remediation and heavy metal detection.</div></div>","PeriodicalId":101215,"journal":{"name":"Tetrahedron Green Chem","volume":"5 ","pages":"Article 100077"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820642","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

Visible light photoredox catalyzed controlled oxidative desulfurization of thioureas using CBr4: A new route for the synthesis of thioamidoguanidine 可见光光氧化还原催化CBr4控制硫脲氧化脱硫：一种合成硫胺胍的新途径

Tetrahedron Green Chem Pub Date : 2025-06-01 Epub Date: 2025-05-14 DOI: 10.1016/j.tgchem.2025.100079

Babita Yadav , Arvind Kumar Yadav , Garima , Atul Kumar Singh , Vishnu Prabhakar Srivastava , Santosh K. Srivastava

引用次数: 0

Synthesis and characterization of SnS2 nanoparticles for enhanced photocatalytic and electrochemical sensing applications 用于增强光催化和电化学传感的SnS2纳米颗粒的合成和表征

Tetrahedron Green Chem Pub Date : 2025-06-01 Epub Date: 2025-02-05 DOI: 10.1016/j.tgchem.2025.100067

Sumanjali Kota , Akshay Shivashankar , Tushvitha Dhayakaran , Uthkruthi Munegowda , Bharath K. Devendra

{"title":"Synthesis and characterization of SnS2 nanoparticles for enhanced photocatalytic and electrochemical sensing applications","authors":"Sumanjali Kota , Akshay Shivashankar , Tushvitha Dhayakaran , Uthkruthi Munegowda , Bharath K. Devendra","doi":"10.1016/j.tgchem.2025.100067","DOIUrl":"10.1016/j.tgchem.2025.100067","url":null,"abstract":"<div><div>This study presents a straightforward, cost-effective method for synthesizing Tin Sulfide (SnS<sub>2</sub>) nanoparticles using magnetic stirring. The prepared SnS<sub>2</sub> was analyzed using XRD, FESEM, EDAX, UV–Vis, FTIR, XPS, HRTEM, and SAED analysis. The photodegradation of Methyl Violet (MV) dye achieved a 93.8 % decolourization rate within 120 min, following first-order kinetic reaction rates. The half-life (t1/2) was determined to be 31.18 min, and the stability of the photocatalyst was evaluated under different pH conditions. Cyclic Voltammetry (CV) studies were performed using a carbon paste electrode in 2 M KOH, revealing a low electrochemical value and proton diffusion coefficient for SnS<sub>2</sub>, indicating good redox behaviour with a C<sub>sp</sub> of approximately 158 F/g. The electrochemical sensing of urea demonstrated excellent performance with the SnS<sub>2</sub> electrode. Additionally, the sensor's pH response was investigated under three different pH conditions, showing remarkable urea sensing capabilities influenced by pH and electrolyte environment.</div></div>","PeriodicalId":101215,"journal":{"name":"Tetrahedron Green Chem","volume":"5 ","pages":"Article 100067"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143386521","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

ANO-catalyzed multicomponent synthesis of 3-nitroalkyl-N-substituted pyrroles 3-硝基烷基-n -取代吡咯的多组分催化合成

Tetrahedron Green Chem Pub Date : 2025-06-01 Epub Date: 2024-12-08 DOI: 10.1016/j.tgchem.2024.100060

Luiz H. Dapper , Viviane T. Mena , Márcio S. Silva , Filipe Penteado , Eder J. Lenardão

引用次数: 0

Protecting group-free photocatalyzed O-arylation of quinic acid 保护无基光催化奎宁酸o -芳基化

Tetrahedron Green Chem Pub Date : 2025-06-01 Epub Date: 2025-02-22 DOI: 10.1016/j.tgchem.2025.100070

Miguel A. Bárbara , Nuno R. Candeias , Luis F. Veiros , Filipe Menezes , Andrea Gualandi , Pier G. Cozzi , Carlos A.M. Afonso

{"title":"Protecting group-free photocatalyzed O-arylation of quinic acid","authors":"Miguel A. Bárbara , Nuno R. Candeias , Luis F. Veiros , Filipe Menezes , Andrea Gualandi , Pier G. Cozzi , Carlos A.M. Afonso","doi":"10.1016/j.tgchem.2025.100070","DOIUrl":"10.1016/j.tgchem.2025.100070","url":null,"abstract":"<div><div>This study presents a novel and environmentally friendly approach to the preparation of quinic acid-derived esters from photocatalyzed <em>O</em>-arylation with haloarenes. This study expands the quinic acid-derived chemical space from renewable biomass by harnessing the power of visible-light-driven photocatalysis under mild conditions without the need for protecting groups. A thorough screening of reaction conditions, including the choice of photocatalyst, solvent, base, nickel source, and ligand, led to the identification of the most effective conditions, these being 5CzBN as the optimal photocatalyst, and glyme-based nickel complexes as the preferred nickel source. These conditions enabled the formation of <em>O</em>-arylated products with good yields without noticeable formation of decarboxylated products. Computational calculations support the proposed mechanism for the <em>O</em>-arylation process, based on oxidative addition, anion exchange, and reductive elimination upon energy transfer from the photocatalyst to the Ni(II) species. Computational considerations for a nickel-catalyzed photodecarboxylative arylation mechanism suggest that the oxidation of quinate by the excited photocatalyst or other species derived thereof is considerably less favorable than a pathway only involving energy transfer to a nickel species. The research provides valuable insights into the mechanism of this environmentally conscious transformation.</div></div>","PeriodicalId":101215,"journal":{"name":"Tetrahedron Green Chem","volume":"5 ","pages":"Article 100070"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563344","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

Mesoporous MPC@TMG, a basic heterogeneous organocatalyst in C–C/C–N bond forming reactions: Tandem multicomponent synthesis of 5-amino-pyrazole-4-carbonitriles and 1H-Pyrazolo [1,2-b] phthalazine-5, 10-dione derivatives under sustainable reaction conditions 介孔 MPC@TMG，C-C/C-N 键形成反应中的一种碱性异相有机催化剂：在可持续反应条件下串联多组分合成 5-氨基吡唑-4-甲腈和 1H-Pyrazolo [1,2-b] phthalazine-5, 10-dione 衍生物

Tetrahedron Green Chem Pub Date : 2024-12-01 Epub Date: 2024-06-28 DOI: 10.1016/j.tgchem.2024.100049

Atif Mustafa, Nazia Zameer, Nida Khan, Zeba N. Siddiqui

{"title":"Mesoporous MPC@TMG, a basic heterogeneous organocatalyst in C–C/C–N bond forming reactions: Tandem multicomponent synthesis of 5-amino-pyrazole-4-carbonitriles and 1H-Pyrazolo [1,2-b] phthalazine-5, 10-dione derivatives under sustainable reaction conditions","authors":"Atif Mustafa, Nazia Zameer, Nida Khan, Zeba N. Siddiqui","doi":"10.1016/j.tgchem.2024.100049","DOIUrl":"https://doi.org/10.1016/j.tgchem.2024.100049","url":null,"abstract":"<div><p>A metal-free, effective, and sustainable protocol has been developed to carry out C–N and C–C bond-forming reactions leading to the formation of 5-amino-pyrazole-4-carbonitriles and 1H-pyrazolo [1,2-b] phthalazine-5, 10-dione derivatives via a tandem multicomponent reaction using mesoporous MPC@TMG as a basic heterogeneous organocatalyst. The reactions were performed in aqueous medium at room temperature. The synthesized organocatalyst MPC@TMG was characterized by numerous spectroscopic techniques such as Fourier Transform Infrared (FTIR), Powder X-ray diffraction (PXRD), Brunauer-Emmett-Teller (BET), Scanning Electron Microscope (SEM), Energy Dispersive X-ray (EDX), elemental mapping, and Thermal Gravimetric (TG) analyses. MPC@TMG displayed excellent catalytic potential, high thermochemical stability, and reusability for up to eight catalytic runs and offered the title compounds in excellent yields (>90 %) in a short reaction time (6–15 min). The synthesized compounds were characterized through FTIR, <sup>1</sup>H, and <sup>13</sup>C Nuclear Magnetic Resonance (NMR) spectroscopy. The use of water as a green solvent, the generality of the method, easy catalyst recovery, a simple work-up procedure, and zero involvement of any metal are the key features of the present protocol making it green and sustainable for the synthesis of the desired heterocycles and is supported by the calculations for green metrics parameters.</p></div>","PeriodicalId":101215,"journal":{"name":"Tetrahedron Green Chem","volume":"4 ","pages":"Article 100049"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773223124000141/pdfft?md5=767c7d9bf3bd3a1538fa3ab55658a738&pid=1-s2.0-S2773223124000141-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141483668","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

Synergistic effects of hydroxyl and tertiary amine in the catalytic carbonatization of epoxides with CO2 at atmospheric pressure 羟基和叔胺在常压下催化环氧化物与二氧化碳的碳化反应中的协同效应

Tetrahedron Green Chem Pub Date : 2024-12-01 Epub Date: 2024-11-08 DOI: 10.1016/j.tgchem.2024.100057

Fawaz Al Hussein , Andreas Hartwig , Henning Großekappenberg

{"title":"Synergistic effects of hydroxyl and tertiary amine in the catalytic carbonatization of epoxides with CO2 at atmospheric pressure","authors":"Fawaz Al Hussein , Andreas Hartwig , Henning Großekappenberg","doi":"10.1016/j.tgchem.2024.100057","DOIUrl":"10.1016/j.tgchem.2024.100057","url":null,"abstract":"<div><div>Fixation of carbon dioxide is a key issue for the sustainable synthesis of chemical compounds. A catalyst system for the preparation of cyclic carbonates by the fixation of carbon dioxide (CO<sub>2</sub>) onto epoxides is presented. This system is designed for easy application due to the availability of the compounds on an industrial scale as well as moderate reaction conditions. Notably, it avoids the use of metal-halogen catalysts and instead employs a tertiary amine as the catalytic center, in conjunction with an alcohol acting as a hydrogen bond donor (HBD). The kinetics of the cycloaddition reaction between epoxides and CO<sub>2</sub> were thoroughly investigated using IR spectroscopy. Remarkably, optimization of the amino-to-alcohol group ratio and the amine structure was carried out to enhance the overall performance of the catalyst system showing a synergistic effect between the tertiary amine and the hydroxyl. Most notably, this entire process is conducted without the use of solvents and operates at ambient pressure, underscoring its significant ecological advantages.</div></div>","PeriodicalId":101215,"journal":{"name":"Tetrahedron Green Chem","volume":"4 ","pages":"Article 100057"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655451","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

Sodium dispersion-mediated reductive dimerization of benzylic halides for symmetrical bibenzyls: Column-free applications to natural products 钠分散介导的苄基卤化物还原二聚反应制备对称联苄：天然产品的无柱应用

Tetrahedron Green Chem Pub Date : 2024-12-01 Epub Date: 2024-08-30 DOI: 10.1016/j.tgchem.2024.100052

Bubwoong Kang , Tatsuro Imamura , Tetsuya Satoh

{"title":"Sodium dispersion-mediated reductive dimerization of benzylic halides for symmetrical bibenzyls: Column-free applications to natural products","authors":"Bubwoong Kang , Tatsuro Imamura , Tetsuya Satoh","doi":"10.1016/j.tgchem.2024.100052","DOIUrl":"10.1016/j.tgchem.2024.100052","url":null,"abstract":"<div><p>We report a method for the synthesis of symmetrical bibenzyls by the reductive dimerization of benzylic halides using sodium dispersion (SD). SD, a reagent consisting of sodium particles dispersed in mineral oil, has recently attracted attention as a safer but more reactive source of sodium than sodium lump. We have found that the reductive dimerization of benzylic halides proceeds within 1 h at room temperature in tetrahydrofuran (THF) solvent using SD as a reducing agent. This method is highly sustainable for the synthesis of symmetrical bibenzyls since it uses sodium, which is abundant on earth. As the SD-derived mineral oil in the crude product can be readily removed, three natural products were synthesized on a gram scale without the need for column chromatography. The utility of this reaction was also exemplified by a decagram-scale reaction using 2-methyltetrahydrofuran, known as a green alternative solvent to THF.</p></div>","PeriodicalId":101215,"journal":{"name":"Tetrahedron Green Chem","volume":"4 ","pages":"Article 100052"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773223124000177/pdfft?md5=974f8d91370aea55b9080da717002992&pid=1-s2.0-S2773223124000177-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142136573","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

Egg shell powder mediated Cu catalyst: A biowaste based catalytic approach for the synthesis of quinazolin-4(3H)-ones and propargyl amines 蛋壳粉介导的铜催化剂：基于生物废料的喹唑啉-4(3H)-酮和丙炔胺合成催化方法

Tetrahedron Green Chem Pub Date : 2024-12-01 Epub Date: 2024-09-11 DOI: 10.1016/j.tgchem.2024.100055

Nilakshi Dutta , Kaberi Hazarika , Roktopol Hazarika , Bulan B. Boruah , Surajit Konwer , Bipul Sarma , Diganta Sarma

{"title":"Egg shell powder mediated Cu catalyst: A biowaste based catalytic approach for the synthesis of quinazolin-4(3H)-ones and propargyl amines","authors":"Nilakshi Dutta , Kaberi Hazarika , Roktopol Hazarika , Bulan B. Boruah , Surajit Konwer , Bipul Sarma , Diganta Sarma","doi":"10.1016/j.tgchem.2024.100055","DOIUrl":"10.1016/j.tgchem.2024.100055","url":null,"abstract":"<div><p>A novel and efficient approach for a tandem oxidative synthesis of quinazolin-4(<em>3H</em>)-one from 2-aminobenzonitrile and benzyl alcohol has been unveiled via Cu<sub>2</sub>(CO<sub>3</sub>)(OH)<sub>2</sub>. Herein CuSO<sub>4.</sub>5H<sub>2</sub>O accompanied by egg shell powder is used for the easy preparation of Cu<sub>2</sub>(CO<sub>3</sub>)(OH)<sub>2</sub>. The reported method portrays a wide range of substrate scope with good to excellent yield and the given reaction proceed at room temperature within 12 h. Single crystal of one of the synthesized quinazolin-4(<em>3H</em>)-ones was analysed through single crystal X-ray diffraction (SC-XRD). Some of the compounds reported here are also known to possess various pharmaceutical activities. Eventually the newly prepared catalyst was applied for propargylamine synthesis via a multi component reaction. Perceiving all the advantages, present protocol is conceivably considered as clean, cost-effective and sustainable over reported procedures used for synthesis of quinazolin-4(<em>3H</em>)-ones and propargyl amines.</p></div>","PeriodicalId":101215,"journal":{"name":"Tetrahedron Green Chem","volume":"4 ","pages":"Article 100055"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773223124000207/pdfft?md5=c9c788110c513235d50753ee01d75177&pid=1-s2.0-S2773223124000207-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142232338","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

Three-component carbonylative Michael addition of aryl bromides using abundant metal-carbonyl under light 在光照下利用丰富的金属羰基对芳基溴进行三组分羰基迈克尔加成反应

Tetrahedron Green Chem Pub Date : 2024-12-01 Epub Date: 2024-10-02 DOI: 10.1016/j.tgchem.2024.100056

Shiqian Zhang , Quansheng Mou , Bowen Cao, Tongyu Han, Mingxin Liu

引用次数: 0