Decoration of multiwalled carbon nanotubes with protected iron nanoparticles

McCafferty, Liam; Stolojan, Vlad; King, Simon G.; Zhang, Wei; Haq, Sajad; Silva, S. Ravi P.

doi:10.1016/j.carbon.2014.11.042

Cited by 12 publications

(11 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since its early preparation by Cotton and Wilkinson in the 1950s, the easily available and rugged compound [Fe 2 Cp 2 (CO) 4 ] has become a “battle horse” of organometallic chemistry . It has been employed in homogeneous catalytic processes, as a convenient precursor to iron nanoparticles, and as a starting material to access a huge variety of mono‐ and dinuclear derivatives. As a preliminary step, both thermal and photochemical methods have been proposed for carbon monoxide/isocyanide substitution; however, these reactions generally afford mixtures of polysubstituted products.…”

Section: Introductionmentioning

confidence: 99%

Regioselective Nucleophilic Additions to Diiron Carbonyl Complexes Containing a Bridging Aminocarbyne Ligand: A Synthetic, Crystallographic and DFT Study

et al. 2017

View full text Add to dashboard Cite

Diiron μ-aminocarbyne compounds, 1a-e, are prepared in two steps from Fe 2 Cp 2 (CO) 4 , negating the need for difficult purification procedures of intermediate species; they are efficiently isolated by alumina chromatography. Minor amounts of μ-aminocarbyne aryl isocyanide compounds, 2a-c, are obtained as side products. The structures of the cations in 1a,c,e are calculated using DFT; the carbyne carbon is generally predicted to be the thermodynamic site of hydride addition, in agreement with a previous experimental finding concerning 1a. Accordingly, the reaction of 1e with NaBH 4 affords a bridging aminocarbene complex, 4, in 85 % yield. Otherwise, the reaction of 1c with NaBH 4 yields the aminocarbyne-cyclopentadiene derivative 3 (70 %), presumably as a consequence of the [a] Scheme 1. Regioselective additions of nucleophiles to the diiron aminocarbyne complex 1a. Results and DiscussionThe commercial compound [Fe 2 Cp 2 (CO) 4 ] was reacted with the appropriate isocyanide, in a ca. 3:2 molar ratio, in acetonitrile solution. [16] The reactions with alkyl isocyanides were conducted under reflux conditions, whereas the reactions with aryl isocyanides proceeded at room temperature. The resulting mixtures were dried under vacuum and the residues were dissolved in dichloromethane and then treated with methyl triflate, thus affording the μ-aminocarbyne complexes 1a-e (Scheme 2). The difficult isolation of the monoisocyanide intermediates (see the Introduction) was unnecessary. The final products 1a-e were efficiently purified by alumina chromatography and were then isolated as microcrystalline, air-stable compounds in 65-92 % yields. The synthesis of 1c-e was accompanied by the side formation of minor products derived from di-isocyanide species, 2a-c. Compounds 2a-c were recovered by the chromatography in 3-12 % yields, although 2a was formerly reported as being Scheme 2. Synthesis of diiron μ-aminocarbyne complexes.Eur. J. Inorg. Chem. 2018, 960-971 www.eurjic.org

show abstract

Section: Introductionmentioning

confidence: 99%

Regioselective Nucleophilic Additions to Diiron Carbonyl Complexes Containing a Bridging Aminocarbyne Ligand: A Synthetic, Crystallographic and DFT Study

et al. 2017

View full text Add to dashboard Cite

show abstract

“…17 The preparation procedure is illustrated in Scheme 1. 17 The preparation procedure is illustrated in Scheme 1.…”

Section: Fe Resin Precursor and Fe-rgo Powdermentioning

confidence: 99%

Adsorbent 2D and 3D carbon matrices with protected magnetic iron nanoparticles

et al. 2015

View full text Add to dashboard Cite

We report on the synthesis of two and three dimensional carbonaceous sponges produced directly from graphene oxide (GO) into which functionalized iron nanoparticles can be introduced to render it magnetic. This simple, low cost procedure, wherein an iron polymeric resin precursor is introduced into the carbon framework, results in carbon-based materials with specific surface areas of the order of 93 and 66 m(2) g(-1), compared to approx. 4 m(2) g(-1) for graphite, decorated with ferromagnetic iron nanoparticles giving coercivity fields postulated to be 216 and 98 Oe, values typical for ferrite magnets, for 3.2 and 13.5 wt% Fe respectively. The strongly magnetic iron nanoparticles are robustly anchored to the GO sheets by a layer of residual graphite, on the order of 5 nm, formed during the pyrolysis of the precursor material. The applicability of the carbon sponges is demonstrated in their ability to absorb, store and subsequently elute an organic dye, Rhodamine B, from water as required. It is possible to regenerate the carbon-iron hybrid material after adsorption by eluting the dye with a solvent to which it has a high affinity, such as ethanol. The use of a carbon framework opens the hybrid materials to further chemical functionalization, for enhanced chemical uptake of contaminants, or co-decoration with, for example, silver nanoparticles for bactericidal properties. Such analytical properties, combined with the material's magnetic character, offer solutions for environmental decontamination at land and sea, wastewater purification, solvent extraction, and for the concentration of dilute species.

show abstract

“…Recently, iron and iron oxide nanoparticles due to their magnetic properties have received significant interest [13]. Also, magnetic iron oxide nanoparticles (BMNPs) have received much attention because of their applications in adsorption of organic compounds and metal ions like Cr6 + , As 3+ , Cu 2+ , Hg 2+ , and Au 3+ from aqueous solution [14].…”

Section: Introductionmentioning

confidence: 99%

Magnetic nanoparticles application in the textile industry—A review

Shahidi

2019

Journal of Industrial Textiles

View full text Add to dashboard Cite

Magnetic nanoparticles have good potential application in textile, environmental, and waste water treatment cause for their unique properties such as large surface areas, size and shape-dependent catalytic properties. Magnetic nanoparticles can be used alone or to be one of a mixed matrix membrane. Smaller particle size provides a higher reactivity. But toxicity, recovery, and stability of these particles are important, and surface modification of these magnetic nanoparticles can reduce these anxieties. The properties and application of these nanoparticles in the textile industry are discussed in this review paper.

show abstract

Decoration of multiwalled carbon nanotubes with protected iron nanoparticles

Cited by 12 publications

References 61 publications

Regioselective Nucleophilic Additions to Diiron Carbonyl Complexes Containing a Bridging Aminocarbyne Ligand: A Synthetic, Crystallographic and DFT Study

Regioselective Nucleophilic Additions to Diiron Carbonyl Complexes Containing a Bridging Aminocarbyne Ligand: A Synthetic, Crystallographic and DFT Study

Adsorbent 2D and 3D carbon matrices with protected magnetic iron nanoparticles

Magnetic nanoparticles application in the textile industry—A review

Contact Info

Product

Resources

About