ChemInform Abstract: The Structures of Lanthanum Hydroxide Nitrates Investigated by the Rietveld Profile Refinement Technique.

Louër, M.; Louër, D.; Delgado, Ana; Martinez, O. García

doi:10.1002/chin.198950008

Cited by 13 publications

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“…Similar X-ray powder study on structural changes of La(OH) 2 (NO 3 )‚H 2 O due to dehydration has been reported earlier. 53 Photoluminescence Study. The luminescence spectra of Pr-(III) compounds are more complex in comparison to that of other lanthanide(III) systems such as Eu 3+ , as Pr(III) can show emission lines originating from three different levels ( 3 P 0 , 1 D 2 and 1 G 4 ) which span the visible and NIR regions.…”

Section: Resultsmentioning

confidence: 99%

A Novel Three-Dimensional Network Containing Pr(III) Ions and Tartrate: Synthesis, Spectroscopic, Thermal, Ab Initio X-ray Powder Structure Analyses, and Photoluminescence Properties

Mondal

Mukherjee

Chakraborty

et al. 2006

Crystal Growth & Design

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A new praseodymium tartrate [Pr(C 4 H 4 O 6 )(C 4 H 5 O 6 )(H 2 O)] has been synthesized under hydrothermal conditions and investigated by UV-Vis, FTIR, X-ray powder diffraction, thermal and photoluminescence analyses. The compound crystallizes in the orthorhombic system with a ) 21.973(4), b ) 7.587(1), c ) 5.958(1) Å, space group P2 1 2 1 2 1 , and Z ) 4. The crystal structure has been solved from laboratory X-ray powder diffraction data using a direct space global optimization technique and refined by the Rietveld method. The Pr atoms in the complex have 9-fold coordination with respect to the oxygens, with the metal center in a distorted monocapped square antiprism coordination. The molecular structure of the complex reveals 22-membered (Pr 4 C 10 O 8 ) nanosized rectangular motifs assembled into helical chains, which are further linked via carboxylate groups of the tartrate ligands forming a novel three-dimensional polymeric framework. A X-ray powder pattern of the anhydrous praseodymium tartrate obtained by heating the title compound at 230°C revealed a monoclinic unit cell with a ) 10.964 (3), b ) 11.612(2), c ) 10.456(4) Å, ) 108.96(2)°. The luminescence spectra of the hydrated Pr complex exhibit a signal at 645 nm due to a 3 P 0 f 3 F 2 transition.

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Section: Resultsmentioning

confidence: 99%

A Novel Three-Dimensional Network Containing Pr(III) Ions and Tartrate: Synthesis, Spectroscopic, Thermal, Ab Initio X-ray Powder Structure Analyses, and Photoluminescence Properties

Mondal

Mukherjee

Chakraborty

et al. 2006

Crystal Growth & Design

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“…Here 25% of the OHions of the M(OH) 2 layers are replaced by NO -3 ions which are coordinated directly to the metal matrix. 7,8 Hydroxy double salts are hydroxysalts of the above-mentioned types containing two different metal ions. A number of hydroxy double salts of the zinc hydroxynitrate type have been studied in the past.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and anion exchange reactions of a layered copper-zinc hydroxy double salt, Cu1.6Zn0.4(OH)3(OAc)·H2O

Rajamathi¹,

Britto²,

Rajamathi³

2005

J Chem Sci

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A mixed-metal hydroxysalt of formula Cu 1⋅6 Zn 0⋅4 (OH) 3 (OAc)⋅H 2 O has been synthesized by an acetate hydrolysis route. Acetate ions can be exchanged with simple inorganic anions such as chloride and nitrate, and organic anions such as benzoate and large surfactant anions such as dodecyl sulphate. Structures of these hydroxysalts are derived from that of Cu 2 (OH) 3 NO 3 ⋅H 2 O with some of the Cu 2+ ions being replaced by Zn 2+ .

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“…Therefore, Sm(OH) 2 NO 3 seems to be correctly described in the acentric space group. Besides, one overcomes the problem of half-occupied sites as discussed in Louer et al (1989).…”

Section: Discussionmentioning

confidence: 99%

“…These chains are additionally edge-linked, thus forming sheets. [For further details see Lundberg and Skarnulis (1976), Mullica et al (1986), and Louer et al (1989).] The sheets are interconnected by hydrogen bonding only, causing the pronounced preferred orientation due to texture observed in the powder pattern.…”

Section: Discussionmentioning

confidence: 99%

“…While single crystal studies (Lundberg andSkarnulis, 1976, Mullica et al, 1986) confirmed the acentric space group (Ln=Pr,Nd,Gd), a al Author to whom correspondence should be addressed. powder investigation by Louer et al (1989) was done in the centric space group (Ln=La). In the course of structure investigations of new Ln-cluster types ([Ln 6 O(OH) 8 (H 2 O) 12 (NO 3 ) 6 ] 2+ ) by Zak et al (1994), singlephase microcrystalline powder of Sm(OH) 2 NO 3 was also obtained, which is characterized by powder methods in the present study.…”

Section: Introductionmentioning

confidence: 99%

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Sm(OH)₂NO₃: Synthesis, characterization, powder diffraction data, and structure refinement by the Rietveld technique

1994

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Sm(OH)2NO3, was prepared by hydrolysis of the corresponding nitrate, leading to a product which is insoluble in water. IR-spectroscopy showed a comparison with the analogous Gd-compound. The temperature of decomposition to SmONO3 is below 573 K. The structure was refined by the Rietveld technique in space group P21, (Z=2), a=6.3852(3) Å, b=3.7784(2) Å, c=7.7402(3) Å, β=97.572(3)°, V=185.11 Å3, Rp=4.9, Rwp=6.3, RB=4.0. The compound is isotypic with Ln(OH)2NO3 (Ln=Pr,Nd,Gd). Infrared spectra and thermal decomposition data are also given for the Gd phase.

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ChemInform Abstract: The Structures of Lanthanum Hydroxide Nitrates Investigated by the Rietveld Profile Refinement Technique.

Abstract: La(OH)2NO3 crystallizes in space group P21/m with Z=2 and La(OH)2NO3·H2O crystallizes in C2/m with Z=4.

Cited by 13 publications

References 0 publications

A Novel Three-Dimensional Network Containing Pr(III) Ions and Tartrate: Synthesis, Spectroscopic, Thermal, Ab Initio X-ray Powder Structure Analyses, and Photoluminescence Properties

A Novel Three-Dimensional Network Containing Pr(III) Ions and Tartrate: Synthesis, Spectroscopic, Thermal, Ab Initio X-ray Powder Structure Analyses, and Photoluminescence Properties

Synthesis and anion exchange reactions of a layered copper-zinc hydroxy double salt, Cu1.6Zn0.4(OH)3(OAc)·H2O

Sm(OH)₂NO₃: Synthesis, characterization, powder diffraction data, and structure refinement by the Rietveld technique

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ChemInform Abstract: The Structures of Lanthanum Hydroxide Nitrates Investigated by the Rietveld Profile Refinement Technique.

Abstract: La(OH)2NO3 crystallizes in space group P21/m with Z=2 and La(OH)2NO3·H2O crystallizes in C2/m with Z=4.

Cited by 13 publications

References 0 publications

A Novel Three-Dimensional Network Containing Pr(III) Ions and Tartrate: Synthesis, Spectroscopic, Thermal, Ab Initio X-ray Powder Structure Analyses, and Photoluminescence Properties

A Novel Three-Dimensional Network Containing Pr(III) Ions and Tartrate: Synthesis, Spectroscopic, Thermal, Ab Initio X-ray Powder Structure Analyses, and Photoluminescence Properties

Synthesis and anion exchange reactions of a layered copper-zinc hydroxy double salt, Cu1.6Zn0.4(OH)3(OAc)·H2O

Sm(OH)2NO3: Synthesis, characterization, powder diffraction data, and structure refinement by the Rietveld technique

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Sm(OH)₂NO₃: Synthesis, characterization, powder diffraction data, and structure refinement by the Rietveld technique