Direct Preparation and Characterization of Copper Pentacyanonitrosylferrate Nanoparticles

Carmo, Devaney Ribeiro do; Souza, Marcela Maria de; Bicalho, Urquisa Oliveira; Santos, Victor José Correia; Souza, Jonás Pereira de; Silvestrini, Daniela Rodrigues

doi:10.1155/2015/502424

Cited by 12 publications

(7 citation statements)

References 26 publications

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“…Here, we successfully synthesized both cobalt and nickel nitroprussides, Co[Fe(CN) 5 NO]· n H 2 O and Ni[Fe(CN) 5 NO]· n H 2 O (hereafter CoNP and NiNP, respectively), via a precipitation reaction by simple stirring in a one-pot aqueous solution at room temperature (detailed procedure in the Supporting Information). − As shown in Figure a, for M[Fe(CN) 5 NO]· n H 2 O, the structure is comprised of M 2+ transition-metal cations octahedrally coordinated with the nitrogen ends of the CN ligands as well as free water molecules in some cases. On the other hand, the Fe 2+ ions are octahedrally coordinated with the carbon ends of CN ligands and also harbor one NO ligand left exposed in the pore.…”

Section: Resultssupporting

confidence: 87%

Transition-Metal Nitroprussides Examined for Water Harvesting and Sorption Cooling

et al. 2020

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Transition-metal pentacyanonitrosylferrates, commonly known as nitroprussides, have a long and documented history. Here, we synthesize cobalt and nickel nitroprussides (NPs) in order to probe their use as sorbents for water and fluorocarbon uptake for potential water harvesting and cooling applications. These NPs show stable and reversible equilibrium sorption isotherms at room temperature with peak uptake values of ∼40 wt % for H 2 O and ∼30 wt % for fluorocarbon R134a. At water harvesting conditions, working capacities of ∼19 wt % were obtained for NPs. At sorption cooling conditions, the working capacities favored nickel NP. Given the advantages of an easy, inexpensive, and scalable synthesis, this study demonstrates the potential for using nitroprussides for future water harvesting and adsorption cooling systems.

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Section: Resultssupporting

confidence: 87%

Transition-Metal Nitroprussides Examined for Water Harvesting and Sorption Cooling

et al. 2020

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“…The FTIR spectrum of NiCl 2 shows a strong absorption band due to the O-H vibrations of water at 3380 cm −1 along with the deformational scissor vibrations of water at 1609 cm −1 [ 39 ]. Both SNP and NNP exhibits similar FTIR spectra with the characteristic strong FTIR bands of C≡N and NO at 2192.10 and 1944.50 cm −1 , respectively, for NNP, and 2134.0 and 1935.70 cm −1 , respectively, for SNP [ 40 , 41 ]. A significant shifting of the C≡N band (58.10 cm −1 ) for NNP to the longer wavelength compared to the SNP suggest the bathochromic shift, characterized by the formation of a binuclear complex of Fe-CN-Ni [ 41 ].…”

Section: Resultsmentioning

confidence: 99%

“…Both SNP and NNP exhibits similar FTIR spectra with the characteristic strong FTIR bands of C≡N and NO at 2192.10 and 1944.50 cm −1 , respectively, for NNP, and 2134.0 and 1935.70 cm −1 , respectively, for SNP [ 40 , 41 ]. A significant shifting of the C≡N band (58.10 cm −1 ) for NNP to the longer wavelength compared to the SNP suggest the bathochromic shift, characterized by the formation of a binuclear complex of Fe-CN-Ni [ 41 ]. The UV-Visible absorption spectra of the NNP together with the SNP and NiCl 2 precursors were measured after dispersing them in ethanol ( Figure S2 ).…”

Section: Resultsmentioning

confidence: 99%

Low-Cost and Efficient Nickel Nitroprusside/Graphene Nanohybrid Electrocatalysts as Counter Electrodes for Dye-Sensitized Solar Cells

Rahman

2021

Materials

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Novel nickel nitroprusside (NNP) nanoparticles with incorporated graphene nanoplatelets (NNP/GnP) were used for the first time as a low-cost and effective counter electrode (CE) for dye-sensitized solar cells (DSSCs). NNP was synthesized at a low-temperature (25 °C) solution process with suitable purity and crystallinity with a size range from 5 to 10 nm, as confirmed by different spectroscopic and microscopic analyses. The incorporation of an optimized amount of GnP (0.2 wt%) into the NNP significantly improved the electrocatalytic behavior for the redox reaction of iodide (I−)/tri-iodide (I3−) by decreasing the charge-transfer resistance at the CE/electrolyte interface, lower than the NNP- and GnP-CEs, and comparable to the Pt-CE. The NNP/GnP nanohybrid CE when applied in DSSC exhibited a PCE of 6.13% (under one sun illumination conditions) with the Jsc, Voc, and FF of 14.22 mA/cm2, 0.628 V, and 68.68%, respectively, while the PCE of the reference Pt-CE-based DSSC was 6.37% (Jsc = 14.47 mA/cm2, Voc = 0.635 V, and FF = 69.20%). The low cost of the NNP/GnP hybrid CE with comparable photovoltaic performance to Pt-CE can be potentially exploited as a suitable replacement of Pt-CE in DSSCs.

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“…This can account for the weaker intensity of the band at 1740 cm –1 in the case of HA/SNP than that of HA/SNAP. Furthermore, a new characteristic peak was observed at 1918 cm –1 , attributed to the NO-stretching vibration in SNP itself, owing to its low degradation rate, so some SNP molecules maintained their composition and precipitated within the HA matrix during the lyophilization (Figure S8B). In the case of HA/SNAP, the half-life of SNAP is around 6 h in an aqueous solution with a pH within the range of 6–8 at 37 °C, while it is approximately 20 h in the case of DETA-NO .…”

Section: Resultsmentioning

confidence: 99%

Interactions between Nitric Oxide and Hyaluronan Implicate the Migration of Breast Cancer Cells

et al. 2022

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Nitric oxide ( • NO) is one of the prominent free radicals, playing a pivotal role in breast cancer progression. Hyaluronic acid (HA) plays an essential role in neutralizing free radicals in tumor tissues. However, its interactions with nitric oxide have not been thoroughly investigated. Hence, this study attempts to understand the mechanism of these interactions and the different effects on the intracellular • NO levels and migration of breast cancer cells. The affinity of HA to scavenge • NO was investigated alongside the accompanying changes in specific physico-chemical properties and the further effects on the • NO-induced attachment and migration of the breast cancer cell lines, MDA-MB-231 and HCC1806. The reaction of the nitrogen dioxide radical, formed via • NO/O 2 interactions, with HA initiated a series of oxidative reactions, which, in the presence of • NO, induce the fragmentation of the polymeric chains. Furthermore, these interactions were found to hinder the NO-induced migration of cancer cells. However, the NO-induced HA modification/fragmentation was inhibited in the presence of hemin, a NO-scavenging compound. Collectively, these results help toward understanding the involvement of HA in the • NO-induced cell migration and suggest the possible modification of HA, used as one of the main materials in different biomedical applications.

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Direct Preparation and Characterization of Copper Pentacyanonitrosylferrate Nanoparticles

Cited by 12 publications

References 26 publications

Transition-Metal Nitroprussides Examined for Water Harvesting and Sorption Cooling

Transition-Metal Nitroprussides Examined for Water Harvesting and Sorption Cooling

Low-Cost and Efficient Nickel Nitroprusside/Graphene Nanohybrid Electrocatalysts as Counter Electrodes for Dye-Sensitized Solar Cells

Interactions between Nitric Oxide and Hyaluronan Implicate the Migration of Breast Cancer Cells

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