Infrared spectra of Cu(II)-Co(II) mixed hydroxide nitrates

Zotov, Ν.; Petrov, Κ.; Dimitrova-Pankova, M.

doi:10.1016/0022-3697(90)90102-l

Cited by 54 publications

(55 citation statements)

References 23 publications

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“…Free nitrate ion shows two active vibration modes, where as the nitrate ion present in the interlayers shows four vibrational modes [66]. These four vibrations have been observed in the IR spectrum of CuO precursor; the peak at 1043 cm À1 , one singlet at 875 cm À1 , doublet at 1418 and 1340 cm À1 and another doublet at 750 and 700 cm À1 [67]. The IR spectral features observed in the case of the mixed metal oxide precursor consist of a combination of bands due to copper hydroxy nitrate and nickel hydroxide with minor changes in the band positions.…”

Section: Resultsmentioning

confidence: 89%

Synthesis of CuO@NiO core-shell nanoparticles by homogeneous precipitation method

Bayal

Jeevanandam

2012

Journal of Alloys and Compounds

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Section: Resultsmentioning

confidence: 89%

Synthesis of CuO@NiO core-shell nanoparticles by homogeneous precipitation method

Bayal

Jeevanandam

2012

Journal of Alloys and Compounds

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“…The intense band at 1421 cm À1 is a characteristic of well crystallized copper hydroxide nitrate [3]. The broad band about 3435 cm À1 is ascribed to the presence of the hydroxyl groups within the layers of CHN and/or physically adsorbed water molecule stretching [3,4,28]. This broadness can indicate the existence of the hydrogen bonding between the layers [4,6].…”

Section: Pxrd Of Chn and The Nanohybrid Cslhmentioning

confidence: 93%

“…[3,4,6]. The band at 675 cm À1 can be attributed to the d-mode of the O-H groups [4,28]. The bands at 877 and 1383 cm À1 show the t 2 and t 3 vibrational modes of the interlayer anion, nitrate in CHN [3,4].…”

Section: Pxrd Of Chn and The Nanohybrid Cslhmentioning

confidence: 95%

Large pore volume mesoporous copper particles and scaffold microporous carbon material obtained from an inorganic–organic nanohybrid material, copper-succinate-layered hydroxide

Ghotbi

Bagheri

Sadrnezhaad

2011

Journal of Colloid and Interface Science

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“…Then, noticeable structural modification might be expected under pressure depending on the compressibility of the carbon chain. In fact, it appears from XRD under isostatic pressure (up to 35 kbar) that the interlayer distance d 001 is not significantly affected by the compression [24]. In turn, only the diffraction lines related to the in-plane periodicities are shifted towards smaller distances under pressure.…”

Section: Spectroscopy Analysismentioning

confidence: 94%

Structural and spectroscopic study of organic-inorganic transition metal based layered magnets

Rabu¹,

Drillon²,

Hornick³

2000

Analusis

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IntroductionRecently, a novel trend of investigation has been the combination of both molecular and solid state chemistry to build hybrid organic-inorganic materials [1]. Clearly, the research on hybrid compounds is very appealing for the design of novel 3d networks in which the physical properties of both assemblies, that are normally found in distinct materials, are in close conjunction [2][3][4][5].Smectite clay minerals (montmorillonite for instance), in which silicate layers are negatively charged by substituting divalent metal ions for trivalent ones, constitute versatile host layer structures for organic or inorganic species. A large number of such cation exchangeable layer compounds are known in which the intercalated species favor pillared structures.Anion exchangeable layered compounds are less common, probably because the anions are usually strongly bound to the metal ions, and form the framework of the crystal. Exchange of interlamellar anions by organic species (dicarboxylic acid anions) was first reported by Miyata and Kumura [6]. Then, the interlayer arrangement of anionic surfactants has been extensively studied in layered double-consisting of positively charged hydroxide layers, separated by A -anions counter-balancing the positive charge of the hydroxy layers [3,4,7,8]. In such compounds, the counterion A -is located in between the hydroxy layers, and no real chemical bond exists usually between the guest and host sub-networks. The cohesion is basically due to electrostatic interactions, and when available to weak hydrogen bond couplings.On the other hand, new hybrid magnetic materials have been prepared by anion exchange reaction, in which the exchangeable anion A -is coordinated to the divalent metal ion. The layered compounds M 2 (OH) 3 A (M = Co, Cu, and A = NO 3 -or OAc -) are shown to be well adapted for substitution reactions [9][10][11][12]. The exchange for large organic species (i.e. aliphatic chain anions) coordinating the metal ion enables to tune the basal spacing, and accordingly to modify drastically the magnetic properties [11,12]. Thus, nalkyl chain molecules involving a single anionic function (carboxylate or sulfate anion), have been used to separate basic layers (Fig. 1a).In that case, the organic spacers exhibit a saturated carbon chain, whose length is mediated by the number of carbon atoms, up to 40 Å [10]. The magnetic interaction within layers is highly dependent on the nature of the anionic function and the chain stacking, so that ferro-, ferri-or antiferromagnetic behavior may be stabilized. Clearly, the n-alkyl chains do not participate directly to interlayer interactionthey may be viewed as "neutral'' pillars -but they modulate the distance between magnetic sheets, and as a result influence through-space magnetic interactions. We have shown that, due to dipolar coupling [13], ferromagnetic 3d order is stabilized when basal spacing becomes large enough (> 10 Å). The interaction mechanism between ferromagnetic layers is then mainly driven by the divergence of the inpl...

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Infrared spectra of Cu(II)-Co(II) mixed hydroxide nitrates

Cited by 54 publications

References 23 publications

Synthesis of CuO@NiO core-shell nanoparticles by homogeneous precipitation method

Synthesis of CuO@NiO core-shell nanoparticles by homogeneous precipitation method

Large pore volume mesoporous copper particles and scaffold microporous carbon material obtained from an inorganic–organic nanohybrid material, copper-succinate-layered hydroxide

Structural and spectroscopic study of organic-inorganic transition metal based layered magnets

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