Pub Date : 2019-03-31DOI: 10.2174/2213346105666181112112330
Chengjiang Fang, Yan Li, Zhaozhuo Yu, Hu Li, Song Yang
Biomass, as the most abundant and renewable organic carbon source, can be upgraded into various value-added platform molecules. To implement more sustainable and economic catalytic biomass valorization, reusable heterogeneous catalysts would be one of the preferable choices. In this work, a series of phosphotungstic acid-based solid hybrids were produced by assembly of phosphotungstic acid with different pyridines using a facile solvothermal method. The obtained 3- phenylpyridine-phosphotungstate hybrid displayed superior catalytic performance in the upgrade of fructose to methyl levulinate with 71.2% yield and 83.2% fructose conversion at 140 ºC for 8 h in methanol, a bio-based and environmentally friendly solvent, which was probably due to its relatively large pore size and high hydrophobicity. This low-cost and eco-friendly catalytic process could be simply operated in a single pot without cumbersome separation steps. In addition, the 3- phenylpyridine-phosphotungstate catalyst was able to be reused for four times with little deactivation.
{"title":"Efficient Catalytic Upgrade of Fructose to Alkyl Levulinates with Phenylpyridine- phosphotungstate Solid Hybrids","authors":"Chengjiang Fang, Yan Li, Zhaozhuo Yu, Hu Li, Song Yang","doi":"10.2174/2213346105666181112112330","DOIUrl":"https://doi.org/10.2174/2213346105666181112112330","url":null,"abstract":"\u0000\u0000Biomass, as the most abundant and renewable organic carbon source, can be upgraded into\u0000various value-added platform molecules. To implement more sustainable and economic catalytic biomass\u0000valorization, reusable heterogeneous catalysts would be one of the preferable choices. In this\u0000work, a series of phosphotungstic acid-based solid hybrids were produced by assembly of phosphotungstic\u0000acid with different pyridines using a facile solvothermal method. The obtained 3-\u0000phenylpyridine-phosphotungstate hybrid displayed superior catalytic performance in the upgrade of\u0000fructose to methyl levulinate with 71.2% yield and 83.2% fructose conversion at 140 ºC for 8 h in\u0000methanol, a bio-based and environmentally friendly solvent, which was probably due to its relatively\u0000large pore size and high hydrophobicity. This low-cost and eco-friendly catalytic process could be\u0000simply operated in a single pot without cumbersome separation steps. In addition, the 3-\u0000phenylpyridine-phosphotungstate catalyst was able to be reused for four times with little deactivation.\u0000","PeriodicalId":10856,"journal":{"name":"Current Green Chemistry","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2019-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2174/2213346105666181112112330","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46634411","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}
Pub Date : 2019-03-31DOI: 10.2174/221334610601190329164654
C. Santi
{"title":"Perspective in Green Chemistry for Organoselenium Compounds (no more an oxymoron)","authors":"C. Santi","doi":"10.2174/221334610601190329164654","DOIUrl":"https://doi.org/10.2174/221334610601190329164654","url":null,"abstract":"","PeriodicalId":10856,"journal":{"name":"Current Green Chemistry","volume":"1 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2019-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2174/221334610601190329164654","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41389899","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}
Pub Date : 2019-03-31DOI: 10.2174/2452273203666190114145322
K. N. Shivhare, Anushree Srivastava, I. Siddiqui
We describe herein the use of glycerol as an efficient and sustainable approach for the synthesis of 2-amino-1, 8-naphthyridine-3-carbonitriles and 2-amino-3-quinolinecarbonitriles. The catalyst- free reactions occur straightforwardly using biodegradable and non-hazardous solvent. It is a strategy to address mounting environmental concerns with current approach includes the use of environmentally benign solvent, simple workup procedure, economic viability, shorter reaction time and providing good to excellent yield.
{"title":"Catalyst-Free Glycerol Promoted Green Synthesis of 2-amino-1,8- naphthyridine -3-carbonitriles and 2-amino-3-quinolinecarbonitriles","authors":"K. N. Shivhare, Anushree Srivastava, I. Siddiqui","doi":"10.2174/2452273203666190114145322","DOIUrl":"https://doi.org/10.2174/2452273203666190114145322","url":null,"abstract":"\u0000\u0000We describe herein the use of glycerol as an efficient and sustainable approach for the synthesis\u0000of 2-amino-1, 8-naphthyridine-3-carbonitriles and 2-amino-3-quinolinecarbonitriles. The catalyst-\u0000free reactions occur straightforwardly using biodegradable and non-hazardous solvent. It is a\u0000strategy to address mounting environmental concerns with current approach includes the use of environmentally\u0000benign solvent, simple workup procedure, economic viability, shorter reaction time and\u0000providing good to excellent yield.\u0000","PeriodicalId":10856,"journal":{"name":"Current Green Chemistry","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2019-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2174/2452273203666190114145322","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49161597","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}
Pub Date : 2019-03-31DOI: 10.2174/2452273203666190114144546
S. Lubbad, Balsam Kamal Abu Al-Roos, F. S. Kodeh
A green and environmental–friendly method for the removal of the hazardous bromothymol blue from aqueous solution was considered applying a hydrophilic, biocompatible and biodegradable natural sorbent of Latvian sphagnum peat moss, applying shaking-dispersive solid-phase extraction. First, the influence of shaking speed was evaluated at 300, 600, 900 U. Furthermore, the optimum conditions of dye-adsorption, such as pH, adsorption-equilibrium contact time, adsorbent mass, and adsorbate initial concentration were investigated. In addition, the adsorption equilibrium isotherms, thermodynamics, and kinetics were studied. Thus, the optimum removal of bromothymol blue was concluded at a shaking speed of 600 U. Regarding the dye adsorption at different pH, bromothymol blue showed two removal maxima at acidic (pH 2.5) and almost neutral (pH 7.5) media, reaching dye % removal of 80.8 and 88.2 %, respectively, in 120 min of adsorption equilibrium contact time. Moreover, the dye removal improved reasonably by increasing the concentration and the sphagnum dose. Additionally, the equilibrium isotherm plot correlated comparably to Langmuir's and Freundlich's models. Also, the adsorption kinetic study demonstrated a better correlation to pseudo-secondorder plot than to pseudo-first-order one. Finally, excellent reproducibility in % removal was demonstrated with RSD values of 2.2 and 2.7% at pH of 7.5 and 2.5, respectively.
{"title":"Adsorptive-removal of Bromothymol Blue as Acidic-dye Probe from Water Solution Using Latvian Sphagnum Peat Moss: Thermodynamic Assessment, Kinetic and Isotherm Modeling","authors":"S. Lubbad, Balsam Kamal Abu Al-Roos, F. S. Kodeh","doi":"10.2174/2452273203666190114144546","DOIUrl":"https://doi.org/10.2174/2452273203666190114144546","url":null,"abstract":"\u0000\u0000A green and environmental–friendly method for the removal of the hazardous bromothymol\u0000blue from aqueous solution was considered applying a hydrophilic, biocompatible and biodegradable\u0000natural sorbent of Latvian sphagnum peat moss, applying shaking-dispersive solid-phase extraction.\u0000First, the influence of shaking speed was evaluated at 300, 600, 900 U. Furthermore, the optimum\u0000conditions of dye-adsorption, such as pH, adsorption-equilibrium contact time, adsorbent mass, and\u0000adsorbate initial concentration were investigated. In addition, the adsorption equilibrium isotherms,\u0000thermodynamics, and kinetics were studied. Thus, the optimum removal of bromothymol blue was\u0000concluded at a shaking speed of 600 U. Regarding the dye adsorption at different pH, bromothymol\u0000blue showed two removal maxima at acidic (pH 2.5) and almost neutral (pH 7.5) media, reaching\u0000dye % removal of 80.8 and 88.2 %, respectively, in 120 min of adsorption equilibrium contact time.\u0000Moreover, the dye removal improved reasonably by increasing the concentration and the sphagnum\u0000dose. Additionally, the equilibrium isotherm plot correlated comparably to Langmuir's and Freundlich's\u0000models. Also, the adsorption kinetic study demonstrated a better correlation to pseudo-secondorder\u0000plot than to pseudo-first-order one. Finally, excellent reproducibility in % removal was demonstrated\u0000with RSD values of 2.2 and 2.7% at pH of 7.5 and 2.5, respectively.\u0000","PeriodicalId":10856,"journal":{"name":"Current Green Chemistry","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2019-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2174/2452273203666190114144546","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44455443","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}
Pub Date : 2019-03-31DOI: 10.2174/2213346106666190130101109
Moumita Roy, A. Mondal, Arijit Mondal, A. Das, D. Mukherjee
Polyaniline supported palladium catalyst was applied in the reductive degradation of organic dyes such as Methylene Blue, Rhodamine B, and Methyl Orange in presence of sodium borohydride as an environmental-friendly approach. Role of pH, catalyst amount, and catalyst support were investigated thoroughly to achieve complete and efficient degradation within few minutes under ambient condition. Heterogeneous nature of the catalyst allowed easy recovery by centrifugation and the catalyst was recycled for five cycles with slightly reduced activity. Recovered catalyst was characterized by ICP-AES and TEM and a slight decrease in the activity of the catalyst was attributed to the agglomeration of the palladium nanoparticles.
{"title":"Polyaniline Supported Palladium Catalyzed Reductive Degradation of Dyes Under Mild Condition","authors":"Moumita Roy, A. Mondal, Arijit Mondal, A. Das, D. Mukherjee","doi":"10.2174/2213346106666190130101109","DOIUrl":"https://doi.org/10.2174/2213346106666190130101109","url":null,"abstract":"\u0000\u0000Polyaniline supported palladium catalyst was applied in the reductive degradation of organic\u0000dyes such as Methylene Blue, Rhodamine B, and Methyl Orange in presence of sodium borohydride\u0000as an environmental-friendly approach. Role of pH, catalyst amount, and catalyst support were investigated\u0000thoroughly to achieve complete and efficient degradation within few minutes under ambient\u0000condition. Heterogeneous nature of the catalyst allowed easy recovery by centrifugation and the catalyst\u0000was recycled for five cycles with slightly reduced activity. Recovered catalyst was characterized\u0000by ICP-AES and TEM and a slight decrease in the activity of the catalyst was attributed to the agglomeration\u0000of the palladium nanoparticles.\u0000","PeriodicalId":10856,"journal":{"name":"Current Green Chemistry","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2019-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2174/2213346106666190130101109","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49314748","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}
Pub Date : 2018-12-10DOI: 10.2174/2213346105666180821114459
S. B. Kasar, S. Thopate
{"title":"Ultrasonically Assisted Efficient and Green Protocol for the Synthesis of Bisindolylmethanes Using Malic Acid as a Homogeneous and Reusable Organocatalyst","authors":"S. B. Kasar, S. Thopate","doi":"10.2174/2213346105666180821114459","DOIUrl":"https://doi.org/10.2174/2213346105666180821114459","url":null,"abstract":"","PeriodicalId":10856,"journal":{"name":"Current Green Chemistry","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2018-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48618416","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}
Pub Date : 2018-12-10DOI: 10.2174/2213346105666181112124629
M. Fabjanowicz, K. Kalinowska, J. Namieśnik, J. Płotka-Wasylka
Nowadays, Green Analytical Chemistry (GAC) idea is of high importance, with impact on the rapid growth in the sample preparation area with special emphasis on sample preparation simplification, miniaturization and automation. Due to the fact that GAC is of high importance today, this study is focused on the evaluation of green sample preparation techniques for organic compounds. It is well known that sample preparation is considered a crucial part of analytical procedures, particularly in samples characterized by complex matrices composition. The parameter of “greenness” is as important as selectivity in order to avoid using harmful organic solvents in sustainable extraction techniques. These solvents can generate hazardous, toxic waste while consuming large resources volume, thus, developing new, eco-friendly and benign solvents which would meet technological and economic demands is perhaps the most popular aspects of Green Chemistry. Some examples of these “green” solvents are given in this work. In addition, several new miniaturized extraction techniques are described. Here you can highlight solid phase microextraction (SPME) and liquid phase microextraction (LPME). However, the best option would be to use direct methods of analysis, where sample preparation is not required. The given study also shows the possibilities and limitations of using Eco-Scale and GAPI tools for the assessment of the green character of selected analytical procedures. Both tools were applied to assess 9 different analytical procedures and both showed similar results presented in a different manner.
{"title":"Evaluation of Green Sample Preparation Techniques for Organic Compounds","authors":"M. Fabjanowicz, K. Kalinowska, J. Namieśnik, J. Płotka-Wasylka","doi":"10.2174/2213346105666181112124629","DOIUrl":"https://doi.org/10.2174/2213346105666181112124629","url":null,"abstract":"Nowadays, Green Analytical Chemistry (GAC) idea is of high importance, with impact on\u0000the rapid growth in the sample preparation area with special emphasis on sample preparation simplification,\u0000miniaturization and automation. Due to the fact that GAC is of high importance today, this\u0000study is focused on the evaluation of green sample preparation techniques for organic compounds. It is\u0000well known that sample preparation is considered a crucial part of analytical procedures, particularly\u0000in samples characterized by complex matrices composition. The parameter of “greenness” is as important\u0000as selectivity in order to avoid using harmful organic solvents in sustainable extraction techniques.\u0000These solvents can generate hazardous, toxic waste while consuming large resources volume,\u0000thus, developing new, eco-friendly and benign solvents which would meet technological and economic\u0000demands is perhaps the most popular aspects of Green Chemistry. Some examples of these\u0000“green” solvents are given in this work. In addition, several new miniaturized extraction techniques\u0000are described. Here you can highlight solid phase microextraction (SPME) and liquid phase\u0000microextraction (LPME). However, the best option would be to use direct methods of analysis, where\u0000sample preparation is not required. The given study also shows the possibilities and limitations of\u0000using Eco-Scale and GAPI tools for the assessment of the green character of selected analytical\u0000procedures. Both tools were applied to assess 9 different analytical procedures and both showed\u0000similar results presented in a different manner.","PeriodicalId":10856,"journal":{"name":"Current Green Chemistry","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2018-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45027674","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}
Pub Date : 2018-12-10DOI: 10.2174/2213346105666181001111019
C. Sarode, G. Gupta, G. Chaudhari, G. P. Waghulde
{"title":"Investigations Related to the Suitability of Imidazolium Based Room Temperature Ionic Liquids and Pyridinium based Sponge Ionic Liquids Towards the Synthesis of 2-aminothiazole Compounds as Reaction Medium and Catalyst","authors":"C. Sarode, G. Gupta, G. Chaudhari, G. P. Waghulde","doi":"10.2174/2213346105666181001111019","DOIUrl":"https://doi.org/10.2174/2213346105666181001111019","url":null,"abstract":"","PeriodicalId":10856,"journal":{"name":"Current Green Chemistry","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2018-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44065188","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}
Pub Date : 2018-11-30DOI: 10.2174/221334610503181123143409
G. Keglevich
{"title":"Perspectives in Green Chemistry – Microwave Irradiation as a Substitute for Catalysts; Case Studies from Organophosphorus Chemistry","authors":"G. Keglevich","doi":"10.2174/221334610503181123143409","DOIUrl":"https://doi.org/10.2174/221334610503181123143409","url":null,"abstract":"","PeriodicalId":10856,"journal":{"name":"Current Green Chemistry","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2174/221334610503181123143409","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48113318","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}
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