eng
Sami Publishing Company
Asian Journal of Green Chemistry
2588-5839
2588-4328
2018-10-01
2
4
281
298
10.22034/ajgc.2018.61867
61867
Silver functionalized on hydroxyapatite-core-shell magnetic γ-Fe2O3: An enviromentaly and readily recyclable nanatalyst for the one-pot synthesis of 14H-dibenzo[a,j]xanthenes derivatives
Zeinab Arzehgar
arzehgar@yahoo.com
1
Abdelkarim Aydi
aydiabdelkarim@gmail.com
2
Mohammad Mirzaei Heydari
mirzaeiheydari@yahoo.com
3
Department of Chemistry, Payame Noor University, PO BOX 19395-4697 Tehran, Iran
Department of Chemical and Materials Engineering, College of Engineering, National College of Chemical Industry, Nancy, Polytechnic Institute of Lorraine, France Frankfurt Am Main Area, Germany
School of Environment, Natural Resources & Geography, Bangor University, Bangor, Gwynedd, Wales, United Kingdom
An efficient and simple procedure for the preparation of silver functionalized on hydroxyapatite-core-shell magnetic γ-Fe2O3 nanoparticles (γ-Fe2O3@HAp-Ag)as an enviromentaly efficient magnetically recoverable and reusable catalyst is described, and it is used for the one-pot synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes via a cost-effective and atom-economical procedure from substituted benzaldehydes and β-naphthol under solvent-free conditions at 60 °C. The attractiveness of this protocol lies in its green approach in that the catalyst is easily recoverable using an external magnet, which makes the process economical.
https://www.ajgreenchem.com/article_61867_7504193e0715c2df4ab2eafc2f3da155.pdf
γ-Fe2O3@HAp-Ag Lewis acidic catalyst 14-aryl-14Hdibenzo[a
j]xanthenes Rusable of catalyst
eng
Sami Publishing Company
Asian Journal of Green Chemistry
2588-5839
2588-4328
2018-10-01
2
4
299
306
10.22034/ajgc.2018.62649
62649
Catalyst and solvent-free synthesis of β-enaminone derivatives
Farahnaz Kargar Behbahani
farahnazkargar@yahoo.com
1
Sara Kafi
sarakafi@ymail.com
2
Hannaneh Gholizadeh
hannanehgholizadeh@yahoo.com
3
Department of Chemistry, Karaj Branch, Islamic Azad University, Karaj, Iran
Department of Chemistry, Karaj Branch, Islamic Azad University, Karaj, Iran
Department of Chemistry, Karaj Branch, Islamic Azad University, Karaj, Iran
In this study, the green procedure for synthesis of the β-enaminones is described. The reaction of aromatic amines with β-dicarbonyl compounds under solvent and catalyst-free conditions at 120 °C affords the β-enaminone and β-enamino esters in high-to-excellent yields, in short reaction time, easy separation, work up and purification without need to column chromatography. Also, some new derivatives of β-enaminones were synthesized using this method. The prominent advantages of this new method is operational simplicity, good yields in short reaction times, easy work-up procedures, catalyst and solvent free condition.
https://www.ajgreenchem.com/article_62649_8b676a408340ca4df7afed43fd4a6e61.pdf
β-Enaminones
Solvent-free
Catalyst-free
Aryl amine
Dicarbonyl compounds
eng
Sami Publishing Company
Asian Journal of Green Chemistry
2588-5839
2588-4328
2018-10-01
2
4
307
317
10.22034/ajgc.2018.62704
62704
Gelatin grafted with drug
Firyal Mohammed Ali Alsalami
drfiryal55@gmail.com
1
Al-Mustansiriyah University, College of Science, Department of Chemistry, Baghdad
In this research a novel drug polymer was prepared. The gelatin as a natural polymer has been used in the pharmaceutical and biomedical for the controlled release through grafted copolymerization with un saturated acid anhydride such as methyl nadic anhydride (Methyl-5-norbornene-2,3-dicarboxylic anhydride), formatted gelatin-g-methyl nadic anhydride copolymer A1, then modified to its corresponding polymer A2 by substituted amoxilline as useful derivative as biomaterial. The prepared drug biopolymer was characterization by FT-IR spectroscopy and controlled drug release was considered in different buffer solution at 37 °C as in vitro study and controlled drug release was compared at zero time and after many days, the methyl nadic anhydride which was used as a spacer between gelatin and amoxilline. It can provide functional groups which are pendant through backbone of polymer substituted with drug through amide groups lead to good sustain release rate for hydrolysis through amide attachment gradually for many days. This design of carries for controlled delivery of the therapeutic agent which could release the entrapped drug over an extended period and control the drug release was compared at zero time and after few days, indicated the rate of hydrolysis in basic medium is higher than acidic medium through hydrolysis of amide groups. It was observed that modified drug release with extended drug action via slow release, also this study gave a new drug polymer and in vivo performance was indicated that it will be talented for some bio active applications.
https://www.ajgreenchem.com/article_62704_e8400f4197d0c865bdc9a649596e1da2.pdf
Gelatin Graft co Polymer Amoxilline Methyl-5-norbornene-2
3-dicarboxylic anhydride
eng
Sami Publishing Company
Asian Journal of Green Chemistry
2588-5839
2588-4328
2018-10-01
2
4
318
329
10.22034/ajgc.2018.62714
62714
One-pot, four component synthesis of pyrazolo[4′,3′:5,6]pyrido[2,3-d]pyrimidines derivatives
Ramin Javahershenas
jshbco@yahoo.com
1
Jabbar Khalafy
jkhalafi@yahoo.com
2
Faculty of Chemistry, Urmia University, 5756151818, Urmia, Iran
Faculty of Chemistry, Urmia University, 5756151818, Urmia, Iran
A green approach to synthesis of the polyfunctionalized pyrazole [4′,3′:5,6]pyrido[2,3-d] pyrimidines derivatives was successfully achieved via one-pot, four component reactions of β-aminocrotonitrile, phenyhydrazine, arylglyoxals, barbituric acid derivatives in the presence of TEA (Triethylamine) as a catalyst in water under the reflux conditions. This protocol provided mild reaction conditions, short reaction times, high yields, low cost, easy isolation of products and possible biological, and pharmaceutical activities.
https://www.ajgreenchem.com/article_62714_d3a41b77a962a33d9085f09b7faaebb6.pdf
β-Aminocrotonitrile Arylglyoxal 1
3-Dimethylbarbituric acid Thiobarbituric acid TEA (triethylamine)
eng
Sami Publishing Company
Asian Journal of Green Chemistry
2588-5839
2588-4328
2018-10-01
2
4
330
337
10.22034/ajgc.2018.62809
62809
One-pot route to nitriles from aldehyde and hydroxylamine hydrochloride on silica-gel
Rakesh Ranjan Chakraborty
rakeshranjanchakraborty@gmail.com
1
Pranab Ghosh
pizy12@yahoo.com
2
Department of Chemistry, University of North Bengal, District Darjeeling, West Bengal, India
Department of Chemistry, University of North Bengal, District Darjeeling, West Bengal, India
A green and facile methodology for the synthesis of nitrile has been established from the corresponding aldehydes and hydroxylamine hydrochloride on silica-gel in hot condition. The protocol is equally effective for aliphatic as well as aromatic aldehydes, and has wide range of functional group tolerance. In addition, this methodology is solvent-free, inexpensive, environmental friendly and involves simple work-up process.
https://www.ajgreenchem.com/article_62809_5484c0cc5794fec5aa2dd2f22e9132ef.pdf
Nitriles
Aldehydes
Hydroxylaminehydrochloride
Silica-gel
eng
Sami Publishing Company
Asian Journal of Green Chemistry
2588-5839
2588-4328
2018-10-01
2
4
338
363
10.22034/ajgc.2018.63330
63330
Synthesized nanoparticles of poly (Styrene–alternative-maleic anhydride) and prunus cerasus rock used for removing Cadmium (II) ions from aqueous solutions
Naser Samadi
samadi75@yahoo.com
1
Reza Ansari
ransari271@guilan.ac.ir
2
Bakhtiar Khodavirdilo
b_khodavirdilo@yahoo.com
3
Department of Analytical Chemistry, Faculty of Chemistry, Urmia University, Urmia, Iran
Department of Chemistry, Faculty of Science, University of Guilan,University Campus 2, Rasht, Iran
Department of Chemistry, Faculty of Science, University of Guilan,University Campus 2, Rasht, Iran
Chelating adsorbents have been considered to be suitable materials for the recovery of cadmium in water treatments. Adsorption of Cadmium (II) ions on melamine-butanedioic acid, modified poly (Styrene-alternative-maleic anhydride) cross-linked by 1, 2-diaminobutane (CSMA-MB) and pit shell of sour cherry (Prunus cerasus rock) (PCR) as an ion exchange adsorbents have been investigated in aqueous solution. The adsorption behavior of these Cadmium (II) ions on the adsorbents was studied by varying the parameters such as pH (2-8), adsorbent dose (0-4.0 g/L-1), contact time (0‒240 min), and Cadmium (II) ion concentration (20-300 mg/L-1). Adsorption percentage was increased by increasing each of these parameters. The isotherm models such as Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich were used to describe adsorption equilibrium. The results showed that the best fit was achieved with the Langmuir isotherm equation, yielding maximum adsorption capacities of 81.30, 80.42 mg/g-1 for Cd (II) with CSMA-MB and PCR respectively. Both adsorbents, CSMA-MB and PCR, are very suitable for the removal Cadmium (II) ions from aqueous solutions. The adsorbents were characterized by fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), x-ray diffraction analysis (XRD).
https://www.ajgreenchem.com/article_63330_3075641c3551fd1a9238e3e776e02c2a.pdf
Chelating adsorbents
Langmuir isotherm
Prunus Cerasus Rock
Adsorption capacities
eng
Sami Publishing Company
Asian Journal of Green Chemistry
2588-5839
2588-4328
2018-10-01
2
4
364
379
10.22034/ajgc.2018.63597
63597
Extraction and purification of phycocyanin from spirulina platensis and evaluating its antioxidant and anti- inflammatory activity
Mahdieh Izadi
izadi.mahdieh@yahoo.com
1
Mohammad Fazilati
fazilati.i.m@gmail.com
2
Department of Biochemistry, Payame Noor University, 19395- 4697, Tehran, Iran
Department of Biochemistry, Payame Noor University, 81581-84431, Isfahan, Iran
Phycocyanin is a blue pigment and water-soluble biliprotein from the spirulina platensis. It has great medical and medicinal properties and has been used as a nutritional supplements. Phycocyanin is also a natural and powerful antioxidant and anti-inflammatory. In this study, the phycocyanin of Spirulina platensis was extracted by using two enzymatic and ultrasonic methods and purified by ammonium sulfate precipitation and dialysis. The UV spectrophotometer absorption of the extracted sample showed a broad peak range at 280, 615, and 652 nm. By using The FT-IR results confirmed the structure and molecular bonds from extracted and purificated phycocyanin. The concentrations obtained at the enzymatically was 0.405 mg/mL and for sonication 0.422 mg/mL. By using the SDS PAGE method, bands of phycocyanin were identified and the molecular weight was determined between 19-14 KD. The antioxidant and anti-inflammatory activity of the phycocyanin was approved with the reaction by DPPH and HOCl.
https://www.ajgreenchem.com/article_63597_3db16ccfc57719527e7bfb36b1362631.pdf
Phycocyanin
Spirulina platensis
NADPH Oxidase
eng
Sami Publishing Company
Asian Journal of Green Chemistry
2588-5839
2588-4328
2018-10-01
2
4
380
394
10.22034/ajgc.2018.65163
65163
Biosorption of Fe (III) onto coffee and tea powder: Equilibrium and kinetic study
Khaled Muftah Elsherif
elsherif27@yahoo.com
1
Ashraf El-Hashani
aiiya600@yahoo.co.uk
2
Ibrahim Haider
ibrahim.haider110@gmail.com
3
Chemistry Department, Faculty of Science, University of Benghazi, Benghazi-Libya
Chemistry Department, Faculty of Science, University of Benghazi, Benghazi-Libya
Libyan Academy-Graduate Institute, Misurata-Libya
The coffee and tea powders were investigated to be as a novel low-cost non-conventional biosorbent for the removal of Fe (III) from aqueous solutions. Biosorption isotherms and kinetics were also assessed. The studied operating parameters were initial Fe (III) concentration, contact time, pH, and biosorbent dose. The adsorption capacity was significantly increased from 9.18 mg/g to 54.14 mg/g when the initial metal ion concentration increased from 20 to 120 ppm. However, the adsorbed amount of Fe was improved from 2.29 to 23.31 mg/g when the biosorbent dose decreased from 1.0 to 0.1 g. Biosorption isothermal data could be well simulated by Langmuir, Freundlich, and then Temkin models denoted by high correlation coefficient values (R2 > 0.95). However, the Dubinin-Radushkevich isotherms model gives the least fit to experimental data. Langmuir adsorption capacities of coffee and tea were 85.5 and 285 mg/g, respectively. The kinetic data fitted very well to the pseudo-second-order kinetic model. As indicated by the biosorption capacity, coffee and tea powder are considered to be an efficient, low cost, and environmentally friendly biosorbent for the removal of Fe (III) ions from aqueous solutions.
https://www.ajgreenchem.com/article_65163_36e0d2ebb42c87f1f64c60584ada41cf.pdf
Biosorption
Iron
Isotherms model
Kinetics