An efficient synthesis of naphtho[2,1-b]furan-2(1H)-ones catalysed by Nafion-H supported on silica-coated super paramagnetic iron oxide nanoparticles

2017 ◽  
Vol 41 (7) ◽  
pp. 408-412 ◽  
Author(s):  
Mohammad Akrami Abarghooei ◽  
Razieh Mohebat ◽  
Zahed Karimi-Jaberi ◽  
Mohammad Hossein Mosslemin
Keyword(s):  
Catalytic Activity ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Hippuric Acid ◽  
Superparamagnetic Iron Oxide ◽  
Significant Loss ◽  
Oxide Nanoparticles ◽  
Efficient Synthesis ◽  
One Pot ◽  
Aryl Aldehydes

A one-pot procedure is descibed for the synthesis of naphtho[2,1- b]furan-2(1 H)-ones via a multicomponent reaction of aryl aldehydes, hippuric acid, acetic anhydride and β-naphthol in the presence of Nafion-H supported on silica-coated superparamagnetic iron oxide nanoparticles under microwave irradiation. The catalyst can be recovered easily and reused several times without significant loss of catalytic activity.

Synthesis of PVP Coated Superparamagnetic Iron Oxide Nanoparticles with a High Saturation Magnetization

2019 ◽  
Vol 290 ◽  
pp. 301-306
Author(s):  
Osama Abu Noqta ◽  
Azlan Abdul Aziz ◽  
Adamu Ibrahim Usman
Keyword(s):  
Iron Oxide ◽  
Saturation Magnetization ◽  
Iron Oxide Nanoparticles ◽  
Superparamagnetic Iron Oxide ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
High Saturation Magnetization ◽  
One Pot ◽  
High Saturation ◽  
Size Of Particles

Superparamagnetic iron oxide nanoparticles (SPION) were synthesized by one pot coprecipitation method at room temperature in the presence of Polyvinylpyrrolidone (PVP). X-ray powder diffraction (XRD), transmission electron microscopy (TEM), and Vibrating Sample Magnetometer (VSM) were used to analysis the physicochemical properties of PVP-SPION. The XRD patterns confirmed that the structure of as-synthesized sample is magnetite with cubic structure system. In TEM results, the image of PVP-SPION displayed that the size of particles was 14.05 nm with narrower size distribution and also the PVP played important role to minimize the agglomeration of SPION. Finally, the high saturation magnetization value of PVP-SPION (53.0 emu/g) indicate the as-synthesized sample has a great potential as a contrast agent for MRI.

One-pot Electro-synthesis and Characterization of Chitosan Capped Superparamagnetic Iron Oxide Nanoparticles (SPIONs) from Ethanol Media

2017 ◽  
Vol 14 (1) ◽  
pp. 42-49 ◽  
Author(s):  
Mustafa Aghazadeh ◽  
Isa Karimzadeh
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Magnetic Particles ◽  
Superparamagnetic Iron Oxide ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Sem Images ◽  
One Pot ◽  
Xrd Patterns

Background: Superparamagnetic iron oxide nanoparticles (SPIONs) are known for various biomedical applications like hyperthermia, magnetic resonance imaging and drug delivery. These magnetic particles should be capped with certain biocompatible agents. In this regard, it is a technological challenge to control size, shape, stability, and dispersibility of SPIONs in desired mediums. Methods: Cathodic electrosynthesis procedure was used for the preparation of naked SPIONs. Naked SPIONs were prepared by galvanostatic electrodeposition by applying the current density of 5 mA cm-2 for 30 min. For preparation of chitosan capped SPIONs, only the composition of deposition electrolyte was changed with the addition of 1 g L–1 chitosan. The prepared NPs were characterized through FE-SEM, TEM, XRD, DLS and VSM techniques. Results: The XRD patterns have the well-defined and relative broad diffraction peaks, which confirmed spinal magnetite structure for both naked CS capped SPIONs. FE-SEM images which clearly showed that both samples have a well-defined 10nm particles with no obvious aggregation. IR bands related to the chemical bonds of chitosan were observed, which proved a chitosan coating. The superparamagnetic nature of the prepared naked and CS-SPIONs were confirmed by VSM data. Conclusion: In summary, a facile electrochemical based platform was developed for the synthesis of chitosan capped superparamagnetic iron oxide nanoparticles from ethanol media. The observed weight loss (~16%) during the calcination of the CS- SPIONs, and also the presence of vibration bands related to the chitosan bands confirmed the chitosan layer on the SPIONs. Also, superparamagnetic nature of the CS capped SPIONs was confirmed by VSM data.

scholarly journals One pot synthesis of amine-functionalized and angular-shaped superparamagnetic iron oxide nanoparticles for MR/fluorescence bimodal imaging application

RSC Advances ◽  
2017 ◽  
Vol 7 (21) ◽  
pp. 12876-12885 ◽  
Author(s):  
Donggeon Yoo ◽  
Chaedong Lee ◽  
Bokyung Seo ◽  
Yuanzhe Piao
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Superparamagnetic Iron Oxide ◽  
Oxide Nanoparticles ◽  
One Pot ◽  
Water Dispersible ◽  
Bimodal Imaging ◽  
Amine Functionalized ◽  
Simple Preparation ◽  
Imaging Application

Herein, we report the simple preparation of water dispersible angular-shaped amine-functionalized super-paramagnetic iron oxide nanoparticles (A-SPIONs).

Sign in / Sign up

Export Citation Format

Share Document