Sami Publishing Company
Asian Journal of Green Chemistry
2588-5839
2588-4328
3
3
2019
07
01
Synthesis nanoparticles derivations of graphene oxide and poly (Styrene–alternative-maleic anhydride) for removing zinc(II) ions from aqueous solutions
288
305
EN
Naser
Samadi
Department of Analytical Chemistry, Faculty of Chemistry, Urmia University, Urmia, Iran
samadi75@yahoo.com
Reza
Ansari
Department of Chemistry, Faculty of Science, University of Guilan, University Campus 2, Rasht, Iran
ransari271@guilan.ac.ir
Bakhtiar
Khodavirdilo
Department of Chemistry, Faculty of Science, University of Guilan, University Campus 2, Rasht, Iran
b_khodavirdilo@yahoo.com
10.22034/ajgc.2018.142104.1088
In this research, a new method that used graphene oxide (GO) nanosheets melamine butanedioic acid (GO-MB) composites and derivation of poly (Styrene–alternative-maleic anhydride) (SMA), (SMA + melamine-butanedioic acid) (SMA-MB) is presented as sorbents for the elimination of zinc(II) ions from aqueous solutions. The adsorbents have the sufficiency to adsorb the zinc(II) ions. Through immobilizing the melamine-butanedioic acid onto GO nanosheets and SMA-MB, the desired composite was synthesized and identified by field emission scanning electron microscopy (FE-SEM) and fourier transform infrared (FT-IR) spectroscopy techniques. Some experimental parameters including, pH, concentration of the aqueous solution of zinc(II) ions, the content of the zinc(II) ions, the grapheme oxide-melamine-butanedioic acid, and SMA-MB were optimized. The results showed that, the adsorbents were matched with langmuir isotherm. It was also revealed that the uptake efficiency of zinc(II) ions considerably increased after immobilization of melamine-butanedioic acid on the GO nanosheets and SMA. These adsorbents were also shown to be very suitable to remove the zinc(II) ions from aqueous solutions.
Langmuir isotherm,Elimination,Melamine-Butanedioic acid,graphene oxide
https://www.ajgreenchem.com/article_76836.html
https://www.ajgreenchem.com/article_76836_c821b219fd9b4f971dc5a19f5a751313.pdf
Sami Publishing Company
Asian Journal of Green Chemistry
2588-5839
2588-4328
3
3
2019
07
01
Facile ionic liquid-mediated, multi component synthesis of dihydro-1H-furo[2,3-c]pyrazoles
306
321
EN
Venkata Swamy
Tangeti
Dr. S.R.K. Government Arts College (Pondicherry University), Yanam, U.T of Puducherry, India
swamychempcu@gmail.com
10.22034/ajgc.2018.142927.1090
A facile, convenient, efficient, and high-yielding diastereoselective synthesis of a novel fused dihydro-1<em>H</em>-furo[2,3-<em>c</em>]pyrazole by a one-pot four-component reaction of <em>β</em>-keto ester, hydrazine, aromatic aldehyde and pyridinium salt in the presence of [bmIm]OH ionic liquid medium provided with excellent yields. Three new bonds (two C‒C and one C‒O), and two stereo centres are generated in a single operation. Low cost, short reaction time, excellent yield, operational simplicity, and more importantly the purification of the compounds by a non-chromatographic method make this process very significant for academic research and practical applications.
Ionic liquid Multi component reaction (MCR) Dihydrofuro[1,2b]pyrazole Green synthesis
https://www.ajgreenchem.com/article_77204.html
https://www.ajgreenchem.com/article_77204_6d4163702ef4f6bc820bd53bc846b470.pdf
Sami Publishing Company
Asian Journal of Green Chemistry
2588-5839
2588-4328
3
3
2019
07
01
Identification and characterization of diterpenes from ethyl acetate fraction of stem barks of Boswellia papyrifera (del) hochst, sudanese medicinal plant
322
335
EN
Ibrahim
Abdurrahman
Department of Basic Science, University of Zalingei, Zalingei, Sudan
moniter123@outlook.com
Hu
Yu-Lai
College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, P.R. China
huyl@nwnu.edu.cn
Yang
Cai-Xia
College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, P.R. China
yangcx@nwnu.edu.cn
Tuhami E.
Hagr
College of Applied and Industrial Sciences, University of Bahri, Khartoum, Sudan
wadhager78@gmail.com
10.22034/ajgc.2018.142810.1089
In this study, the diterpen compounds present in the ethyl acetate fraction of stem bark of <em>Boswellia papyrifera </em>grown in Sudan were investigated using gas chromatography-mass spectrometry (GC-MS), based upon interpretation of the mass spectra fragmentation data, matching their mass spectra with NIST databases, and by comparison of the mass spectra obtained with those reference compounds published in literature. A total of nine diterpenes were identified as m-camphorene <strong>1</strong>, pimaradiene <strong>2,</strong> verticilla-4(20),7,11-triene <strong>3, </strong>serratol <strong>4</strong>, incensole <strong>5,</strong> incensyl acetate <strong>6,</strong> duva-3,9,13-trien-1α-ol-5,8-oxide-1-acetate <strong>7,</strong> incensole oxide <strong>8</strong>, incensole oxide acetate <strong>9</strong> respectively. Among them compound <strong>1</strong>, <strong>2</strong>, <strong>4</strong> and <strong>7 </strong>were reported here for the first time from this plant.
Boswellia papyrifera,Burseraceae,diterpenes,GC-MS
https://www.ajgreenchem.com/article_77369.html
https://www.ajgreenchem.com/article_77369_1a99a78f128e032e4b23f16a77566501.pdf
Sami Publishing Company
Asian Journal of Green Chemistry
2588-5839
2588-4328
3
3
2019
07
01
Rapid access of some rare chiral azides from sterically hindered alcohols by green chemistry protocol
336
344
EN
Mohammad Nuruzzaman
Khan
Department of Chemistry, Begum Rokeya University, Rangpur-5400, Bangladesh
mnkhan002@gmail.com
Harendra Nath
Roy
Department of Chemistry, University of Rajshahi, Rajshahi-6205, Bangladesh
hnroy01@yahoo.com
Pijush Kanti
Roy
Department of Chemistry, Mawlana Bhashani Science and Technology University, Tangail-1902, Bangladesh
roypijush_ru@yahoo.com
Mohammad Motahar
Hossain
Department of Chemistry, University of Rajshahi, Rajshahi-6205, Bangladesh
motahar_chem@yahoo.com
10.22034/ajgc.2018.140100.1085
Azides are the precursors of two important derivatives in synthetic organic chemistry. Achiral amines are not as demandable as that of chiral ones. Chiral amines and diamines have versatile uses in enantioselective reactions. Both simple and amino alcohols were undergone smooth azidation reaction in the mixture of NaN<sub>3</sub>, H<sub>2</sub>SO<sub>4</sub> in toluene solvent and afforded good to charming yields. Importantly, optical purity of some chiral amino alcohols was reserved during azidation reaction. This is an efficient method to synthesise new azides for the fabrication of new organocatalyst which is friendly to the environment.
Azide,Chiral Catalyst,Enantioselective Reaction,Dean-Stark Trap
https://www.ajgreenchem.com/article_77849.html
https://www.ajgreenchem.com/article_77849_ee6b0948a3438c68bcb683000fba54d8.pdf
Sami Publishing Company
Asian Journal of Green Chemistry
2588-5839
2588-4328
3
3
2019
07
01
Proximate composition and in vitro antioxidant properties of Rhizophora mucronata plant part extract
345
352
EN
Samanjit
kaur
PG & Research Department of Biotechnology, Mohamed Sathak College of Arts and Science, Sholinganallur, Chennai-600119, Tamil Nadu, India
saman.jkaur@gmail.com
Syed Ali
Mohamed Yacoob
PG & Research Department of Biotechnology, Mohamed Sathak College of Arts and Science, Sholinganallur, Chennai-600119, Tamil Nadu, India
syedmicro555@gmail.com
Anuradha
Venktraman
PG & Research Department of Biochemistry, Mohamed Sathak College of Arts and Science, Sholinganallur, Chennai-600119, Tamil Nadu, India
vanuradha.2003@gmail.com
Yogananth
Nagarajan
PG & Research Department of Biotechnology, Mohamed Sathak College of Arts and Science, Sholinganallur, Chennai-600119, Tamil Nadu, India
bioyogaa@gmail.com
Suganya
Vasudevan
PG & Research Department of Biochemistry, Mohamed Sathak College of Arts and Science, Sholinganallur, Chennai-600119, Tamil Nadu, India
srisugan20@gmail.com
Bhuvana
Punniyamoorthy
PG & Research Department of Biochemistry, Mohamed Sathak College of Arts and Science, Sholinganallur, Chennai-600119, Tamil Nadu, India
babu.vip2013@gmail.com
10.22034/ajgc.2018.143172.1091
<em>Rhizophora mucronata </em>is a species of mangrove widely distributed in Indian mangrove forest. It seems to be more tolerant of inundation than other mangrove species and often forms an evergreen fringe to mangrove areas. In present study, the methanolic extract of different parts of <em>Rhizophora mucronata,</em> their antioxidant properties along with primary, secondary metabolites and proximate composition, were tested. Better antioxidant activity was gained by methanolic extract of leaf than root and bark extract. Antioxidant potential of the extracts was analyzed as contents of total phenols and flavonoids; radical scavenging activity by the DPPH methods, NO and H<sub>2</sub>O<sub>2 </sub>and primary and secondary metabolites assay and the results of antioxidative activities from the <em>R. mucronata</em> plant. The total content of phenols and flavonoids in the methanol extracts of the studied species positively correlated with their antioxidant properties, confirmed their major role in antioxidant activity of these <em>R. mucronata</em>.
Rhizophora mucronata,Mangroves,Antioxidant,proximate composition
https://www.ajgreenchem.com/article_79903.html
https://www.ajgreenchem.com/article_79903_bf44c131fc4c94dec81c6aa35a88f095.pdf
Sami Publishing Company
Asian Journal of Green Chemistry
2588-5839
2588-4328
3
3
2019
07
01
In vitro evaluation of its antimicrobial effect of the synthesized Fe3O4 nanoparticles using Persea Americana extract as a green approach on two standard strains
353
365
EN
Sirous
Seifi Mansour
Department of Chemistry, Ardabil Branch, Islamic Azad University, Ardabil, Iran
soheilaabdollahzadeh@yahoo.com
Elham
Ezzatzadeh
0000-0002-6271-7694
Department of Chemistry, Ardabil Branch, Islamic Azad University, Ardabil, Iran
dr.ezzatzadeh@yahoo.com
Roya
Safarkar
Department of Biology, Ardabil Branch, Islamic Azad University, Ardabil, Iran
royasafarkar@yahoo.com
10.22034/ajgc.2018.154682.1113
The biological synthesis of NPs using plant extracts plays an important role in the field of nanotechnology. In this study, magnetite nanoparticles (Fe<sub>3</sub>O<sub>4</sub> NPs) were synthesized using a rapid, single step and completely green biosynthetic method by reducing ferric chloride hexahydrate and ferrous chloride tetrahydrate solution with <em>Persea Americana</em> leaf aqueous extract containing flavonoids and phenolic compounds as the main factor which acts as the reducing agent and efficient stabilizer. The structural and properties of the Fe<sub>3</sub>O<sub>4</sub> NPs were investigated by UV-visible spectroscopy, fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM),transmission electron microscopy (TEM) and vibrating sample magnetometry (VSM). Moreover, the antimicrobial properties of Fe<sub>3</sub>O<sub>4</sub> NPs were confirmed using the disk diffusion test and minimum inhibitory concentration and minimum bactericidal concentration on <em>Staphylococcus aureus</em> and <em>Escherichia coli</em>. The obtained results of disk diffusion test indicated that Fe<sub>3</sub>O<sub>4</sub> NPs prevented the bacterial growth. Additionally, the obtained results demonstrated that the minimum inhibitory concentration and minimum bactericidal concentration of Fe<sub>3</sub>O<sub>4</sub> NPs for <em>Staphylococcus</em> <em> aureus</em> were 12.5 mg/mLandfor <em>Escherichia coli</em> were 6.25 mg/mL. The findings of this study showed that Fe<sub>3</sub>O<sub>4</sub> NPs can be used to inhibit the mentioned bacteria.
Green synthesis,Fe3O4-NPs,MIC,MBC,Persea Americana
https://www.ajgreenchem.com/article_80089.html
https://www.ajgreenchem.com/article_80089_8ce456c51153f5d247e38db66697cfbc.pdf
Sami Publishing Company
Asian Journal of Green Chemistry
2588-5839
2588-4328
3
3
2019
07
01
Green oxidation reactions by graphene oxide-based catalyst with aqueous hydrogen peroxide
366
381
EN
Mehrnaz
Alem
Chemistry Department, Payame Noor University, 19395-3697, Tehran, Iran
mehrnaz.alem@gmail.com
Shahnaz
Kazemi
Department of Chemistry, Faculty of Science, University of Birjand, P. O. Box 97175-615, Birjand, Iran
s_kazemi7026@yahoo.com
Abbas
Teimouri
Chemistry Department, Payame Noor University, 19395-3697, Tehran, Iran
a_teimoory@yahoo.com
Hossein
Salavati
Chemistry Department, Payame Noor University, 19395-3697, Tehran, Iran
hosseinsalavati@yahoo.com
10.22034/ajgc.2018.144166.1097
This study reports the synthesis, characterization and catalytic properties of a novel supported catalyst on the basis of nickel acetate hydrate (NiOAC) immobilized on graphene oxide (GO) modified polyethylene glycol (PEG). The catalyst was characterized by scanning electron microscopy (FESEM), X-ray diffraction spectroscopy (XRD), furrier transforms infrared spectroscopy (FT-IR) and diffuse reluctance spectroscopy (DRS). It showed a high activity in the green oxidation of thioanisole as a model substrate to sulfoxide product at ambient temperature and presurre. To establish the general applicability of the process, various sulfides were subjected to the oxidation system using the synthesized catalyst. The reactivities of the sulfur compounds were influenced by two main factors, i.e., the electron density on the S atom and the steric hindrance of the sulfur compound. In addition, ethanol was selected as a green solvent for this procedure. The effects of the main process variables including H<sub>2</sub>O<sub>2</sub> amount (mmol), reaction time (min) and catalyst amount (mg) were analyzed by response surface methodology (RSM) based on the central composite design (CCD). The optimal condition for conversion of thioanisole was found to be O/S ratio 3.4, reaction time 31 min for 21 mg of catalyst amount.
Catalytic,graphene oxide,Green Oxidation,Nanocomposite polyethylene glycol
https://www.ajgreenchem.com/article_80486.html
https://www.ajgreenchem.com/article_80486_cab3be5fb33118c481db55729593a68a.pdf
Sami Publishing Company
Asian Journal of Green Chemistry
2588-5839
2588-4328
3
3
2019
07
01
Eco-friendly biosynthesis of silver nanoparticles using aqueous solution of Spartium junceum flower extract
382
390
EN
Mohammad Ali
Nasseri
Department of Chemistry, College of Sciences, University of Birjand, P. O. Box 97175-615, Birjand, Iran
manaseri@birjand.ac.ir
Mansoore
Shahabi
Department of Chemistry, College of Sciences, University of Birjand, P. O. Box 97175-615, Birjand, Iran
shahabi8894@birjand.ac.ir
Ali
Allahresani
Department of Chemistry, College of Sciences, University of Birjand, P. O. Box 97175-615, Birjand, Iran
a_allahresani@birjand.ac.ir
Milad
Kazemnejadi
0000-0002-5424-9640
Department of Chemistry, College of Sciences, University of Birjand, P. O. Box 97175-615, Birjand, Iran
miladkazemnejad@yahoo.com
10.22034/ajgc.2018.144365.1099
Green synthesis of nanoparticles has received great attention from scientists due to their undeniable applications in all field of science. In this study, an eco-friendly and fast approach is reported for the preparation of silver nanoparticle (Ag NPs) using <em>Spartium junceum</em> flower extract, as a reductant and stabilizer agent, from aqueous solution of silver nitrate. The biosynthesis of silver nanoparticles was optimized by investigating the reaction parameters including: pH, temperature, concentration of plant extract and interaction time. The silver nanoparticles were characterized by UV-vis, fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), dynamic light scattering (DLS) and transmission electron microscopy (TEM) analyses. Also, the biosynthesis of Ag NPs was confirmed by UV-vis spectroscopy through the presence of a characteristic surface plasmon resonance (SPR) band for Ag NPs at l<sub>max</sub>=420 nm. The synthesized nanoparticles were crystalline in nature, nearly spherical in shape with 15-25 nm range of sizes.
Biomaterials,Silver nanoparticles,Biosynthesis,Spartium junceum,HRTEM
https://www.ajgreenchem.com/article_80634.html
https://www.ajgreenchem.com/article_80634_cd8fc262632657a8785742dd6193b4e3.pdf
Sami Publishing Company
Asian Journal of Green Chemistry
2588-5839
2588-4328
3
3
2019
07
01
Ionic liquids (ILs): advances in biorefinery for the efficient conversion of lignocellulosic biomass
391
417
EN
Aderemi T.
Adeleye
Department of Chemistry, University of Ibadan, Ibadan, Nigeria
Hitler
Louis
CAS Key Laboratory for Nanosystem and Hierarchical Fabrication, CAS Centre for Excellence in Nanoscience, National Centre for Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, China
louismuzong@gmail.com
Hamzat A.
Temitope
Department of Chemistry, Faculty of Physical Sciences, University of Ilorin, Ilorin, Nigeria
Monday
Philip
CAS Key Laboratory for Nanosystem and Hierarchical Fabrication, CAS Centre for Excellence in Nanoscience, National Centre for Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, China
philipmonday1988@gmail.com
Pigweh I.
Amos
CAS Key Laboratory for Nanosystem and Hierarchical Fabrication, CAS Centre for Excellence in Nanoscience, National Centre for Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, China
Thomas O.
Magu
Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Cross River State, Nigeria
Akakuru U.
Ozioma
Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Cross River State, Nigeria
Oluwatobi O.
Amusan
Department of Chemistry, Faculty of Physical Sciences, University of Ilorin, Ilorin, Nigeria
10.22034/ajgc.2018.146881.1100
Lignocellulosic biomass contains polymers of cellulose, hemicellulose, and lignin, bound together in a complex structure. Many physicochemical structural and compositional factors hinder the hydrolysis of cellulose present in biomass to sugars and other organic compounds that can later be converted to fuels. These factors hindering access to sugars contained in lignocelluloses are summed up as “recalcitrance”. As a result, pretreatment is required to allow liberal access to the full contents of lignocellulosic biomass. Production of value added co-products along with biofuels through integrated biorefinery processes create the need for selectivity during pretreatment. Pretreatment is an important tool for biomass-to-biofuels conversion processes and is the subject of this review article. The major target of pretreatment is to make the cellulose accessible to hydrolysis for conversion to fuels. Various pretreatment techniques change the physical and chemical structure of the lignocellulosic biomass and enhance the degree of hydrolysis. During the past few years a large number of pretreatment methods have been developed, including alkali treatment, ammonia explosion, and others. Many methods have been shown to result in high sugar yields, for lignocellulosic biomasses such as woods, grasses, corn, rice straw, etc. In this review, we discuss the ionic liquids (ILs) pretreatment method in biorefinery and the recent literature that has reported on the use of these so called green solvents for pretreatment of various lignocellulosic biomasses, ionic liquids have recently become very popular solvents for the dissolution of biomass due to their unique features as compared to conventional solvents.
Lignocellulosic biomass,Ionic liquids (ILs),Biorefinery,Biofuels
https://www.ajgreenchem.com/article_81306.html
https://www.ajgreenchem.com/article_81306_be2d43db7e013a6b8c1fc548bdd17d08.pdf