Magnetism of metal cyanide networks assembled at interfaces

Culp, Jeffrey T.; Park, Ju‐Hyun; Frye, F.; Huh, Young‐Duk; Meisel, Mark W.; Talham, Daniel R.

doi:10.1016/j.ccr.2005.05.011

Cited by 63 publications

(46 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[1][2][3][4][5][6][7][8] Our real-space configurations do show a reproducible difference in Ni-C and Ni-N bond lengths ͓1.880͑9͒ and 1.834͑9͒ Å, respectively͔. Moreover, when we interchange C and N atoms in our configurations, further refinement also interchanges the mismatched bond lengths so that the same average values are obtained again on convergence ͑Fig.…”

Section: B Metal-c/n Bond Lengthsmentioning

confidence: 82%

“…One of the most appealing aspects of the cyanide ion as a coordinating ligand is its ability to promote the growth of low-dimensional crystalline phases through its linear coordination motif M-CN-M. [1][2][3][4][5][6][7][8] Nickel͑II͒ cyanide, Ni͑CN͒ 2 , is a particularly topical example because it has been proposed as an inorganic analog of graphene, 9 capable of forming intercalates 10,11 and even nanotubular structures. 9 Quite remarkably, however, key aspects of its crystal structure remain unknown.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Aperiodicity, structure, and dynamics inNi(CN)2

et al. 2009

View full text Add to dashboard Cite

By combining the results of both x-ray diffraction and neutron total-scattering experiments, we show that Ni͑CN͒ 2 exhibits long-range structural order only in two dimensions, with no true periodicity perpendicular to its gridlike layers. Reverse Monte Carlo analysis gives an experimental distinction between M-C and M-N bond lengths in a homometallic cyanide framework and identifies the vibrational modes responsible for anomalous positive and negative thermal expansion in the title compound.

show abstract

Section: B Metal-c/n Bond Lengthsmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Aperiodicity, structure, and dynamics inNi(CN)2

et al. 2009

View full text Add to dashboard Cite

show abstract

“…An important feature of especially Co-Fe Prussian blue systems is the phenomenon of photoinduced magnetization or photoreversible enhancement of magnetization [19-21] which has been observed in e.g. Rb 1.8 Co III 3.3 Co II 0.7 [Fe II (CN) 6 ] 3.3 · 13H 2 O [22,23], Na 0.34 Co 1.33 [Fe(CN) 6 ] · 4.5H 2 O [19], or K 0.4 Co 1.4 [Fe(CN) 6 ] · 5H 2 O [20].…”

Section: Introductionmentioning

confidence: 99%

Thermal decomposition of [Co(en)3][Fe(CN)6]∙ 2H2O: Topotactic dehydration process, valence and spin exchange mechanism elucidation

Trávníček

Zbořil

Matiková-Maľarová

et al. 2013

Chemistry Central Journal

View full text Add to dashboard Cite

BackgroundThe Prussian blue analogues represent well-known and extensively studied group of coordination species which has many remarkable applications due to their ion-exchange, electron transfer or magnetic properties. Among them, Co-Fe Prussian blue analogues have been extensively studied due to the photoinduced magnetization. Surprisingly, their suitability as precursors for solid-state synthesis of magnetic nanoparticles is almost unexplored.In this paper, the mechanism of thermal decomposition of [Co(en)3][Fe(CN)6] ∙∙ 2H2O (1a) is elucidated, including the topotactic dehydration, valence and spins exchange mechanisms suggestion and the formation of a mixture of CoFe2O4-Co3O4 (3:1) as final products of thermal degradation.ResultsThe course of thermal decomposition of 1a in air atmosphere up to 600°C was monitored by TG/DSC techniques, 57Fe Mössbauer and IR spectroscopy. As first, the topotactic dehydration of 1a to the hemihydrate [Co(en)3][Fe(CN)6] ∙∙ 1/2H2O (1b) occurred with preserving the single-crystal character as was confirmed by the X-ray diffraction analysis. The consequent thermal decomposition proceeded in further four stages including intermediates varying in valence and spin states of both transition metal ions in their structures, i.e. [FeII(en)2(μ-NC)CoIII(CN)4], FeIII(NH2CH2CH3)2(μ-NC)2CoII(CN)3] and FeIII[CoII(CN)5], which were suggested mainly from 57Fe Mössbauer, IR spectral and elemental analyses data. Thermal decomposition was completed at 400°C when superparamagnetic phases of CoFe2O4 and Co3O4 in the molar ratio of 3:1 were formed. During further temperature increase (450 and 600°C), the ongoing crystallization process gave a new ferromagnetic phase attributed to the CoFe2O4-Co3O4 nanocomposite particles. Their formation was confirmed by XRD and TEM analyses. In-field (5 K / 5 T) Mössbauer spectrum revealed canting of Fe(III) spin in almost fully inverse spinel structure of CoFe2O4.ConclusionsIt has been found that the thermal decomposition of [Co(en)3][Fe(CN)6] ∙∙ 2H2O in air atmosphere is a gradual multiple process accompanied by the formation of intermediates with different composition, stereochemistry, oxidation as well as spin states of both the central transition metals. The decomposition is finished above 400°C and the ongoing heating to 600°C results in the formation of CoFe2O4-Co3O4 nanocomposite particles as the final decomposition product.

show abstract

“…PBA is a family of molecule‐based magnetic compounds of general formula A x M y [M’(CN) 6 ] z (where A is an alkali‐metal cation and M and M’ are transition metal ions) whose magnetism can be tuned by an external stimulus. Even though the study of PBA has traditionally been limited to bulk compounds, lately they have also been processed onto surfaces as films7 and more recently into nanoparticles8 opening the possibility of using them for the development of new electronic or spintronic devices. However, there are still several limitations to overcome in order to accomplish this objetive.…”

Section: Introductionmentioning

confidence: 99%

Nanopatterning of Anionic Nanoparticles based on Magnetic Prussian‐Blue Analogues

Coronado

Forment‐Aliaga

Pinilla-Cienfuegos

et al. 2012

Adv Funct Materials

View full text Add to dashboard Cite

Prussian‐blue analogues (PBA) are a family of molecule‐based magnetic compounds of general formula AxMy[M’(CN)6]z, whose magnetic properties can be tuned by an external stimulus. This tunability makes PBA good candidates for their integration into new electronic or spintronic devices. As a previous step to accomplish this integration, PBA need to be deposited onto surfaces in controllable ways and if possible into specific positions on the surface. Even though the study of PBA has traditionally been limited to bulk, lately they have also been processed as nanoparticles (NPs). Here an efficient approach is presented for the accurate deposition and organization of PBA‐NPs of different sizes (from ∼6 to ∼25 nm) over silicon surfaces. The approach used in this work, relies on a combination of surface functionalization with local oxidation nanolithography (LON) and uses electrostatic interactions between PBA‐NPs and a charged self‐assembled monolayer patterned on specific parts of the silicon surface. By using atomic force microscopy (AFM), magnetometry, infrared spectroscopy (IR) and auger electron spectroscopy (AES) we show that the deposition process does not affect NPs properties. In addition, we present a study on the evolution of AFM nanolithographed SiO2 patterns under sonication.

show abstract

Magnetism of metal cyanide networks assembled at interfaces

Cited by 63 publications

References 42 publications

Aperiodicity, structure, and dynamics inNi(CN)2

Aperiodicity, structure, and dynamics inNi(CN)2

Thermal decomposition of [Co(en)3][Fe(CN)6]∙ 2H2O: Topotactic dehydration process, valence and spin exchange mechanism elucidation

Nanopatterning of Anionic Nanoparticles based on Magnetic Prussian‐Blue Analogues

Contact Info

Product

Resources

About