Constructing synergistic groups in porous aromatic frameworks for the selective removal and recovery of lead(ii) ions

2018 ◽  
Vol 6 (12) ◽  
pp. 5202-5207 ◽  
Author(s):  
Yajie Yang ◽  
Zhuojun Yan ◽  
Lili Wang ◽  
Qinghao Meng ◽  
Ye Yuan ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Porous Material ◽  
Functional Group ◽  
High Selectivity ◽  
Selective Removal ◽  
High Uptake ◽  
Hierarchically Porous ◽  
Porous Aromatic Frameworks ◽  
Removal And Recovery

Two kinds of functional group are associated together in a hierarchically porous material. Due to a synergistic effect, the product exhibits a high uptake of Pb2+ ions with high selectivity.

Sulfonyl Radical Triggered Selective Iodosulfonylation and Bicycli-zations of 1,6-Dienes

2021 ◽  
Author(s):  
Shi-Ping Wu ◽  
Dong-Kai Wang ◽  
Qing-Qing Kang ◽  
Guo-Ping Ge ◽  
Hongxing Zheng ◽  
...  
Keyword(s):  
Functional Group ◽  
High Selectivity ◽  
Reaction Conditions ◽  
First Time

A novel sulfonyl radical triggered selective iodosulfonylation and bicyclizations of 1,6-dienes has been described for the first time. High selectivity and efficiency, mild reaction conditions, excellent functional group compatibility, and...

Selective removal and recovery of phosphate in a novel fixed-bed process

1996 ◽  
Vol 33 (10-11) ◽  
pp. 139-147 ◽  
Author(s):  
Dongye Zhao ◽  
Arup K. Sengupta
Keyword(s):  
Industrial Wastewater ◽  
Laboratory Experiments ◽  
Fixed Bed ◽  
Sorption Process ◽  
Selective Removal ◽  
Synthetic Wastewater ◽  
Chelating Polymer ◽  
Efficient Regeneration ◽  
Polymeric Ligand ◽  
Removal And Recovery

This paper reports salient features of a new fixed-bed sorption process in regard to ultimate removal and recovery of phosphate from municipal and industrial wastewater. The sorbent, referred to as polymeric ligand exchanger(PLE), is essentially a copper(II) loaded specialty chelating polymer. Laboratory experiments have demonstrated that the PLE: can remove phosphate selectively from municipal and synthetic wastewater; is amenable to efficient regeneration; and provides opportunities to recover phosphate and reuse the spent regenerant for multiple numbers of cycles.

scholarly journals Iron-Catalyzed C(sp2)–C(sp3) Cross-Coupling of Aryl Chlorobenzoates with Alkyl Grignard Reagents

Molecules ◽  
2020 ◽  
Vol 25 (1) ◽  
pp. 230 ◽  
Author(s):  
Elwira Bisz ◽  
Michal Szostak
Keyword(s):  
Organic Synthesis ◽  
Nucleophilic Addition ◽  
Functional Group ◽  
High Selectivity ◽  
Cross Coupling ◽  
Environmentally Benign ◽  
Grignard Reagents ◽  
High Importance ◽  
Iron Salts ◽  
The Cross

Aryl benzoates are compounds of high importance in organic synthesis. Herein, we report the iron-catalyzed C(sp2)–C(sp3) Kumada cross-coupling of aryl chlorobenzoates with alkyl Grignard reagents. The method is characterized by the use of environmentally benign and sustainable iron salts for cross-coupling in the catalytic system, employing benign urea ligands in the place of reprotoxic NMP (NMP = N-methyl-2-pyrrolidone). It is notable that high selectivity for the cross-coupling is achieved in the presence of hydrolytically-labile and prone to nucleophilic addition phenolic ester C(acyl)–O bonds. The reaction provides access to alkyl-functionalized aryl benzoates. The examination of various O-coordinating ligands demonstrates the high activity of urea ligands in promoting the cross-coupling versus nucleophilic addition to the ester C(acyl)–O bond. The method showcases the functional group tolerance of iron-catalyzed Kumada cross-couplings.

A metal–organic framework with suitable pore size and dual functionalities for highly efficient post-combustion CO2 capture

2019 ◽  
Vol 7 (7) ◽  
pp. 3128-3134 ◽  
Author(s):  
Hui-Min Wen ◽  
Caijun Liao ◽  
Libo Li ◽  
Ali Alsalme ◽  
Zeid Alothman ◽  
...  
Keyword(s):  
Porous Material ◽  
Pore Size ◽  
Adsorption Capacity ◽  
Co2 Capture ◽  
High Selectivity ◽  
Metal Organic Framework ◽  
Heat Of Adsorption ◽  
Highly Efficient ◽  
Metal Organic ◽  
Organic Framework

A novel porous material was realized for highly efficient post-combustion CO2 capture with high CO2 adsorption capacity, high selectivity and moderate heat of adsorption, mainly attributed to the suitable pore size and dual functionalities.

Electrolysis for the benign conversion of renewable feedstocks

2007 ◽  
Vol 79 (11) ◽  
pp. 2047-2057 ◽  
Author(s):  
Hans J. Schäfer ◽  
Michael Harenbrock ◽  
Elisabeth Klocke ◽  
Mark Plate ◽  
Andreas Weiper-Idelmann
Keyword(s):  
Fatty Acids ◽  
Electron Transfer ◽  
Carboxylic Acid ◽  
Functional Group ◽  
High Selectivity ◽  
Bond Forming ◽  
Carboxylic Acid Groups ◽  
Renewable Feedstocks ◽  
Good Accordance ◽  
Hydroxy Groups

A large variety of C,C-bond forming reactions and functional group interconversions can be achieved by electron transfer. For the conversion of renewable feedstocks, electrolysis has been applied to coupling of radicals generated by anodic decarboxylation of fatty acids and carboxylic acids of carbohydrates. Furthermore, a derivative of L-gulonic acid is converted nearly quantitatively into L-xylonolacton. Trimethyl aconitate from trimethyl citronate is dimerized stereoselectively at the cathode in 72 % yield to a cyclic hexamethyl ester by an inter- and intramolecular Michael addition. Two acetoxy groups are added anodically to methyl conjuenate (obtained from methyl linoleate) to form methyl (E)-9,12-diacetoxy-10-octenoate and methyl (E)-10,13-diacetoxy-11-octenoate in 85 % yield. The primary hydroxy groups in mono- and disaccharides can be oxidized to carboxylic acid groups in good yield and high selectivity by anodic oxidation with 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO) as mediator. The results demonstrate that electrolysis is in good accordance with many of the 12 principles of green chemistry.

scholarly journals Mine Water as a Resource: Selective Removal and Recovery of Trace Antimony from Mine-Impacted Water

2019 ◽  
Vol 38 (2) ◽  
pp. 431-446 ◽  
Author(s):  
Mona Arnold ◽  
Petteri Kangas ◽  
Annukka Mäkinen ◽  
Eugene Lakay ◽  
Niko Isomäki ◽  
...  
Keyword(s):  
Mine Water ◽  
Selective Removal ◽  
Mine Impacted Water ◽  
Removal And Recovery
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