Green composite nanostructure (Fe3O4@PEG-SO3H): Preparation, characterization and catalytic performance in the efficient synthesis of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="mml5" display="inline" overflow="scroll" altimg="si1.gif"><mml:mi>β</mml:mi></mml:math>-amino carbonyl compounds at room temperature

Maleki, Ali; Zand, Pedram; Mohseni, Zahra; Firouzi-Haji, Razieh

doi:10.1016/j.nanoso.2018.03.012

Cited by 19 publications

(6 citation statements)

References 26 publications

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“…PP coating would give rather bulk shells to the NPs, compared to the small molecules (Cit and Ale). The hydrophilic nature PEG endows the NPs with water solubility and allows doing application research of the NPs in aqueous media. − Basically, EuIO NPs have a T 1 – T 2 dual-modal MRI contrast ability as a result of the lanthanide and IO materials.…”

Section: Resultsmentioning

confidence: 99%

Surface Design of Eu-Doped Iron Oxide Nanoparticles for Tuning the Magnetic Relaxivity

Park

Lee

Kim

et al. 2018

ACS Appl. Mater. Interfaces

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Relaxivity tuning of nanomaterials with the intrinsic T- T dual-contrast ability has great potential for MRI applications. Until now, the relaxivity tuning of T and T dual-modal MRI nanoprobes has been accomplished through the dopant, size, and morphology of the nanoprobes, leaving room for bioapplications. However, a surface engineering method for the relaxivity tuning was seldom reported. Here, we report the novel relaxivity tuning method based on the surface engineering of dual-mode T- T MRI nanoprobes (DMNPs), along with protein interaction monitoring with the DMNPs as a potential biosensor application. Core nanoparticles (NPs) of europium-doped iron oxide (EuIO) are prepared by a thermal decomposition method. As surface materials, citrate (Cit), alendronate (Ale), and poly(maleic anhydride- alt-1-octadecene)/poly(ethylene glycol) (PP) are employed for the relaxivity tuning of the NPs based on surface engineering, resulting in EuIO-Cit, EuIO-Ale, and EuIO-PP, respectively. The key achievement of the current study is that the surface materials of the DMNP have significant impacts on the r and r relaxivities. The correlation between the hydrophobicity of the surface material and longitudinal relaxivity ( r) of EuIO NPs presents an exponential decay feature. The r relaxivity of EuIO-Cit is 13.2-fold higher than that of EuIO-PP. EuIO can act as T- T dual-modal (EuIO-Cit) or T-dominated MRI contrast agents (EuIO-PP) depending on the surface engineering. The feasibility of using the resulting nanosystem as a sensor for environmental changes, such as albumin interaction, was also explored. The albumin interaction on the DMNP shows both T and T relaxation time changes as mutually confirmative information. The relaxivity tuning approach based on the surface engineering may provide an insightful strategy for bioapplications of DMNPs and give a fresh impetus for the development of novel stimuli-responsive MRI nanoplatforms with T and T dual-modality for various biomedical applications.

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Section: Resultsmentioning

confidence: 99%

Surface Design of Eu-Doped Iron Oxide Nanoparticles for Tuning the Magnetic Relaxivity

Park

Lee

Kim

et al. 2018

ACS Appl. Mater. Interfaces

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“…Therefore, herein, we focused on using water as a carrier liquid to produce the aqueous magnetite ferrofluids owing to their simplicity, stability, and biocompatibility. Nevertheless, despite producing magnetite nanoparticles in aqueous ferrofluids, combining magnetite nanoparticles with metals and metal oxides has also become an essential method for enhancing their antibacterial performance, such as in magnetite/mordenite/CuO core-shell nanocomposites (Rajabi & Sohrabnezhad 2018), magnetite/Ag nanocomposites (Amarjargal et al 2013) (SiO 2 /SnO 2 )@ZnO@Fe 3 O 4 nanocomposites (Sekhar et al 2019), Fe 3 O 4 @PEG-SO 3 H nanocomposite (Maleki et al 2018), magnetite-TiO 2 nanosheets (Ma et al 2015), magnetite/TiO 2 core/shell nanoparticles (Chen et al 2008), and hyperbranched magnetite/polyurethane nanocomposites (Das et al 2013). Introducing an appropriate transition metal into magnetite is also one of the most potent methods for increasing the antibacterial activity.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Structure and Magnetic Behavior of Zn-Doped Magnetite Aqueous Ferrofluids Prepared from Natural Sand for Antibacterial Agents

Taufiq

Yuliantika

Sunaryono

et al. 2021

An. Acad. Bras. Ciênc.

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This study performs natural sand-based synthesis using the sonochemical route for preparing Zn-doped magnetite nanoparticles. The nanoparticles were dispersed in water as a carrier liquid to form Zn-doped magnetite aqueous ferrofluids. Structural data analysis indicated that the Zn-doped magnetite nanoparticles formed a nanosized spinel structure. With an increase in the Zn content, the lattice parameters of the Zn-doped magnetite nanoparticles tended to increase because Zn 2+ has a larger ionic radius than those of Fe 3+ and Fe 2+ . The existence of Zn-O and Fe-O functional groups in tetrahedral and octahedral sites were observed in the wavenumber range of 400-700 cm -1 . The primary particles of the Zn-doped magnetite ferrofluids tended to construct chain-like structures with fractal dimensions of 1.2-1.9. The gas-like compression (GMC) plays as a better model than the Langevin theory to fit the saturation magnetization of the ferrofluids. The ferrofluids exhibited a superparamagnetic character, with their magnetization was contributed by aggregation. The Zn-doped magnetite ferrofluids exhibited excellent antibacterial activity against gram-positive and negative bacteria. It is suggested that the presence of the negatively charged surface and the nanoparticle size may contribute to the high antibacterial activity of Zn-doped magnetite ferrofluids and making them potentially suitable for advanced biomedical.

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“…[1] A chemical synthesis will be ideal by a combination of a number of environmental, health, safety and economic purposes. [2][3][4][5][6][7][8] Metal-organic frameworks (MOFs) are one of chemical compound that can be provided some of the green chemistry goals. In the last years, the researchers have observed the unprecedented explosion of a new class of porous metal-organic frameworks (MOFs).…”

Section: Introductionmentioning

confidence: 99%

Design and development of novel Co‐MOF nanostructures as an excellent catalyst for alcohol oxidation and Henry reaction, with a potential antibacterial activity

Aryanejad

Bagherzade

Moudi

2019

Applied Organom Chemis

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The novel metal-organic framework Co 2 (bdda) 1.5 (OAc) 1 ·5H 2 O (UoB-3) was synthesized via a simple method at room temperature. UoB-3 was characterized by the different methods, including X-ray diffraction (XRD), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), N 2 -adsorption/desorption and elemental analysis. The catalytic ability of UoB-3 was detected to be excellent for primary and secondary alcohols oxidation reaction with high yields under solvent-free conditions. Moreover, UoB-3 was highly active for Henry reaction of different aldehydes with nitromethane in water as a green solvent. The nanocatalyst can be recycled for five consecutive cycles without losing its activity and structural rigidity. The antibacterial activity of UoB-3 nanostructures towards Gram-negative bacteria, Escherichia coli and Gram-positive bacteria, Bacillus cereus was also evaluated by using an inhibition zone test. These nanostructures exhibited strong antibacterial effect against both of them. The purpose of this study was the developing metal-organic framework materials with the enhanced activity in various fields.

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Green composite nanostructure (Fe3O4@PEG-SO3H): Preparation, characterization and catalytic performance in the efficient synthesis of β-amino carbonyl compounds at room temperature

Cited by 19 publications

References 26 publications

Surface Design of Eu-Doped Iron Oxide Nanoparticles for Tuning the Magnetic Relaxivity

Surface Design of Eu-Doped Iron Oxide Nanoparticles for Tuning the Magnetic Relaxivity

Hierarchical Structure and Magnetic Behavior of Zn-Doped Magnetite Aqueous Ferrofluids Prepared from Natural Sand for Antibacterial Agents

Design and development of novel Co‐MOF nanostructures as an excellent catalyst for alcohol oxidation and Henry reaction, with a potential antibacterial activity

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