Convenient method for preparation of a new absorbent based on biofunctionalized graphene oxide hydrogels using nitrene chemistry and click reaction

2018 ◽  
Vol 27 (9) ◽  
pp. 689-699 ◽  
Author(s):  
Khadijeh Soleimani ◽  
Abbas Dadkhah Tehrani ◽  
Mohsen Adeli ◽  
Shabnam Sattari
Keyword(s):  
Graphene Oxide ◽  
Convenient Method ◽  
Click Reaction ◽  
Nitrene Chemistry

scholarly journals Aryl fluoride functionalized graphene oxides for excellent room temperature ammonia sensitivity/selectivity

RSC Advances ◽  
2018 ◽  
Vol 8 (36) ◽  
pp. 20440-20449 ◽  
Author(s):  
Farheen Khurshid ◽  
M. Jeyavelan ◽  
Keisuke Takahashi ◽  
M. Sterlin Leo Hudson ◽  
S. Nagarajan
Keyword(s):  
Graphene Oxide ◽  
Room Temperature ◽  
Click Reaction ◽  
Functionalized Graphene ◽  
Graphene Oxides ◽  
Covalent Functionalization ◽  
Ammonia Sensing ◽  
Aryl Fluoride

Covalent functionalization of graphene oxide (GO) through ‘‘click’’ reaction and its applications towards ammonia sensing has been demonstrated.

scholarly journals Graphene oxide-based silsesquioxane-crosslinked networks – synthesis and rheological behavior

RSC Advances ◽  
2017 ◽  
Vol 7 (35) ◽  
pp. 21531-21540 ◽  
Author(s):  
Mina Namvari ◽  
Lei Du ◽  
Florian J. Stadler
Keyword(s):  
Graphene Oxide ◽  
Rheological Behavior ◽  
Click Reaction ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Crosslinked Networks ◽  
Oligomeric Silsesquioxane

Click reaction between octa(3-azidopropyl)polyhedral oligomeric silsesquioxane (POSS–(N3)8) and heavily alkyne-decorated graphene oxide (GO) has led to crosslinking POSS with GO.

Copper(II) complex intercalated graphene oxide nanocomposites as versatile, reusable catalysts for click reaction

2020 ◽  
Vol 34 (12) ◽  
Author(s):  
Angel Green Samuel ◽  
Karthikeyan Nagarajan ◽  
Karthick Cidhuraj ◽  
Bhalerao Gopal ◽  
Sujay Chakravarty ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Click Reaction

scholarly journals Synthesis and Antioxidant Activity of Cationic 1,2,3-Triazole Functionalized Starch Derivatives

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 112 ◽  
Author(s):  
Yuan Chen ◽  
Xiguang Liu ◽  
Xueqi Sun ◽  
Jingjing Zhang ◽  
Yingqi Mi ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Hydroxyl Radicals ◽  
Convenient Method ◽  
Click Reaction ◽  
Superoxide Radicals ◽  
Cationic Starch ◽  
Chemically Modified ◽  
Enhanced Solubility ◽  
Starch Derivatives

In this study, starch was chemically modified to improve its antioxidant activity. Five novel cationic 1,2,3-triazole functionalized starch derivatives were synthesized by using “click” reaction and N-alkylation. A convenient method for pre-azidation of starch was developed. The structures of the derivatives were analyzed using FTIR and 1H NMR. The radicals scavenging abilities of the derivatives against hydroxyl radicals, DPPH radicals, and superoxide radicals were tested in vitro in order to evaluate their antioxidant activity. Results revealed that all the cationic starch derivatives (2a–2e), as well as the precursor starch derivatives (1a–1e), had significantly improved antioxidant activity compared to native starch. In particular, the scavenging ability of the derivatives against superoxide radicals was extremely strong. The improved antioxidant activity benefited from the enhanced solubility and the added positive charges. The biocompatibility of the cationic derivatives was confirmed by the low hemolytic rate (<2%). The obtained derivatives in this study have great potential as antioxidant materials that can be applied in the fields of food and biomedicine.

Graphene oxide modified by betaine moieties for improvement of electrorheological performance

RSC Advances ◽  
2015 ◽  
Vol 5 (71) ◽  
pp. 57820-57827 ◽  
Author(s):  
Markéta Ilčíková ◽  
Miroslav Mrlík ◽  
Vladimír Babayan ◽  
Peter Kasák
Keyword(s):  
Graphene Oxide ◽  
Click Reaction

Novel graphene oxide bearing betaine moieties as sulfobetaine (GO-SB), carboxybetaine (GO-CB) and carboxybetaine ester (GO-CBE) moieties were prepared in two simple fabrication processes based on silanization and a thiol–ene click-reaction.

scholarly journals A Novel Fe3O4/Graphene Oxide Composite Prepared by Click Chemistry for High-Efficiency Removal of Congo Red from Water

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Hongliu Jiang ◽  
Yao Cao ◽  
Fengtao Zeng ◽  
Zewu Xie ◽  
Fuan He
Keyword(s):  
Graphene Oxide ◽  
Fe3o4 Nanoparticles ◽  
Congo Red ◽  
High Efficiency ◽  
Ph Value ◽  
Click Reaction ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Magnetic Graphene Oxide ◽  
Modified Graphene Oxide

In this paper, a magnetic graphene oxide (MGO) composite was prepared by the click reaction between the alkyne-modified Fe3O4 nanoparticles and the azide-modified graphene oxide for the purpose of removing the Congo red (CR) dye from water. The deposition of the Fe3O4 nanoparticles on the graphene oxide to successfully prepare the MGO composite was evidenced by the Fourier-transform infrared spectrometer, wide-angle X-ray diffraction equipment, scanning electron microscope, thermal gravimetric analyzer, and Raman spectrometer. The value of saturation magnetization for the MGO composite was 34.9 emu/g. The CR absorption capacities of the MGO composite increased first and then decreased as the pH value increased. It was found that the maximum adsorption capacity of the MGO composite for the CR was as high as 769.2 mg/g. In the absorption-desorption experiment, the CR absorption capacities of the MGO composite from the second cycle to the fifth cycle remained stable to be about 130 mg/g. Moreover, both the Langmuir model for the adsorption isotherm and the pseudo-second-order kinetic model could be used to describe the CR absorption behaviors of the MGO composite.

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