Two New Families of Lanthanide Mixed-Ligand Complexes, Oxalate–Carbonate and Oxalate–Formate: Synthesis and Structure of [Ce(H2O)]2(C2O4)2(CO3)·2.5 H2O and Ce(C2O4)(HCO2)

Roméro, Stéphane; Mosset, A.; Trombe, Jean‐Christian

doi:10.1006/jssc.1996.0382

Cited by 43 publications

(26 citation statements)

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“…9) shows the main exothermic peak at 230 • C due to the residual DEG combustion, and two exothermic peaks centered between 270 and 280 • C that could be assigned to the oxalate-formate and the formate decomposition respectively. 31 On the other hand, TG and DSC curves of CeO 2 (Fig. 10) show, in the same temperature region, two exothermic peaks at 225 and 280 • C with no evidence of a splitting of the peak at 280 • C. Due to the higher quantity of cerium formate and oxalate-formate present, the exothermic peak associated to the decomposition of oxalate-formate species is in this case probably covered by the one relative to the formate combustion.…”

Section: Resultsmentioning

confidence: 89%

Effects of the microwave heating on the properties of gadolinium-doped cerium oxide prepared by polyol method

Gondolini

Mercadelli

Sanson

et al. 2013

Journal of the European Ceramic Society

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Section: Resultsmentioning

confidence: 89%

Effects of the microwave heating on the properties of gadolinium-doped cerium oxide prepared by polyol method

Gondolini

Mercadelli

Sanson

et al. 2013

Journal of the European Ceramic Society

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“…55 Anisotropic mechanical behaviour of crystals has also been demonstrated in a mixed ligand hybrid of cerium oxalate-formate, Ce(C 2 O 4 )(HCO 2 ), 56 which crystallizes with an orthorhombic crystal structure. 57 The structure has unique architecture formed with three distinct basic building blocks, the inorganic M-O-M chains, and the two organic bridging ligands, namely the oxalate (C 2 O 4 2À ) and the formate (HCOO À ) ions, which are effectively oriented perpendicular to one another (Fig. 36).…”

Section: Estimation Of Anisotropic Mechanical Behaviour In Crystalsmentioning

confidence: 99%

Mechanical properties of molecular crystals—applications to crystal engineering

2010

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Image reproduced with permission from Abbie TrewinOther articles published in this issue include:Dipyrrin based homo-and hetero-metallic infinite architectures Stéphane A. Baudron, CrystEngComm, 2010,We present an overview of very recent advances in the understanding of structure-mechanical property correlations in molecular crystals. After the introductory part on some classical twodimensional structures from the literature, we survey recent reports (mostly since 2005) pertinent to the mechanical properties of molecular crystals studied by application of external stress using a range of techniques. This includes both qualitative (shearing, bending and brittle crystals) and quantitative (nanoindentation, powder compaction and high-pressure) studies on establishing the correlation of anisotropic mechanical behaviour with the underlying crystal structure. Section 9, emphasizes on the usefulness of crystal engineering approach to improve the mechanical properties of molecular crystals, particularly the active pharmaceutical ingredients for their better tabletability properties. The parallels of the phenomena in other class of well studied materials are also appropriately drawn and discussed in the context of structure-mechanical property relationship. In the final part we comment on the prospects and ramifications of this emerging field.

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“…Auch der Blick auf die Oxalationen entlang [001] läßt eine "Flächigkeit" erkennen, die der Struktur der Familie leichter Selten-Erdcarbonat-Oxalate [Ln(H 2 O)] 2 (C 2 O 4 ) 2 (CO 3 ) · 2,5H 2 O entspricht[5] und sich auch in Oxalat-Hydraten der Selten Erden findet[3,4,11]. Zwei Formeleinheiten finden in der Elementarzelle Platz, wobei nur eine Er-Lage sowie je ein kristallographisch unabhängiges Carbonat-, ein Oxalation und ein Hydratwasser vorliegen.…”

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“…Zwei Formeleinheiten finden in der Elementarzelle Platz, wobei nur eine Er-Lage sowie je ein kristallographisch unabhängiges Carbonat-, ein Oxalation und ein Hydratwasser vorliegen. Analog zu[5,6] ergibt dies für das an Er koordinierende O-Atom des Hydratwasser-Moleküls aber ein sehr stark gelängtes Schwingungsellipsoid oder aber eine Splitlage mit einer Verteilung von 1:1 bei annehmbaren thermischen Auslenkungsparametern. Sie läßt sich entlang [010] aber auch durch gewellte Schichten aus Carbonationen um Erbiumkationen beschreiben, die ihrerseits durch Oxalationen miteinander verbrückt sind (Abb.…”

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Er2(CO3)2(C2O4)(H2O)2 — Synthese, Kristallstruktur und thermischer Abbau eines Carbonat-Oxalat-Hydrates des ErbiumsProfessor Dieter Naumann zum 60. Geburtstag gewidmet

Müller‐Buschbaum

2002

Z. anorg. allg. Chem.

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The hydrothermal reaction of an equimolar ratio of Er 2 O 3 with the aminoacid L-cysteine in evacuated glass ampoules in H 2 O at 130°C gave transparent, pink crystals of the formula Er 2 (CO 3 ) 2 (C 2 O 4 )(H 2 O) 2 . It crystallises in the monoclinic space group Cm (Z ϭ 2, a ϭ 777.3(2) pm, b ϭ 1492.0(3) pm, Einleitung Basische Selten-Erd Carbonate, Carbonat-Hydrate und Oxalat-Hydrate sind seit längerem bekannt [1Ϫ4]. Verbindungen der Seltenen Erden, die sowohl Carbonat-als auch Oxalat-Anionen enthalten, konnten hingegen erst in jüngster Zeit charakterisiert werden. Zwei Typen von Carbonat-Oxalaten sind als Hydrate erhalten worden: Von den leichten Seltenen Erden La-Dy wurden Verbindungen der allgemeinen Formel [Ln(H 2 O)] 2 (C 2 O 4 ) 2 (CO 3 ) · 2,5H 2 O und von den schwereren Elementen Eu-Ho Verbindungen mit der Formel [Ln(H 2 O)] 2 (C 2 O 4 )(CO 3 ) 2 gefunden [5,6]. Diese weisen einen reziproken Carbonat/Oxalat-Gehalt auf und stammen ebenso aus Precursor-Studien zur Synthese von Keramiken wie alkalimetallhaltige Selten-Erd-Oxalat-Hydrate der Formel [MLn(H 2 O) 2 ](C 2 O 4 ) 2 · H 2 O (mit Ln ϭ LaϪGd, MϭLi,Na und n ϭ 1 oder 2) [7]. Die [Er 2 (CO 3 ) 2 ]-(C 2 O 4 )(H 2 O) 2 zugrundeliegende Synthese zielte nicht auf die Bildung eines Carbonat-Oxalates ab, sondern sollte zur Bildung eines Erbiumsalzes der Aminosäure L-Cystein und

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Two New Families of Lanthanide Mixed-Ligand Complexes, Oxalate–Carbonate and Oxalate–Formate: Synthesis and Structure of [Ce(H2O)]2(C2O4)2(CO3)·2.5 H2O and Ce(C2O4)(HCO2)

Cited by 43 publications

References 4 publications

Effects of the microwave heating on the properties of gadolinium-doped cerium oxide prepared by polyol method

Effects of the microwave heating on the properties of gadolinium-doped cerium oxide prepared by polyol method

Mechanical properties of molecular crystals—applications to crystal engineering

Er2(CO3)2(C2O4)(H2O)2 — Synthese, Kristallstruktur und thermischer Abbau eines Carbonat-Oxalat-Hydrates des ErbiumsProfessor Dieter Naumann zum 60. Geburtstag gewidmet

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