Synthesis, crystal structure and thermal behavior of two hydrated forms of lanthanide phthalates Ln{sub 2}(O{sub 2}+C{sub 6}H{sub 4}-CO{sub 2}){sub 3}(H{sub 2}O) (Ln=Ce, Nd) and Nd{sub 2}(O{sub 2}C-C{sub 6}H{sub 4}-CO{sub 2}){sub 3}(H{sub 2}O){sub 3}
Journal Article
·
· Journal of Solid State Chemistry
- Unite de Catalyse et Chimie du Solide (UCCS) - UMR CNRS 8181, Universite de Lille Nord de France, USTL-ENSCL, Bat C7, BP 90108, 59652 Villeneuve d'Ascq (France)
New hydrated lanthanide phthalates have been hydrothermally prepared with cerium and neodymium in different reaction media involving water or mixed water-ethanol solvent. The monohydrated Ln{sub 2}(1,2-bdc){sub 3}(H{sub 2}O) (Ln=Ce or Nd) and dihydrated Nd{sub 2}(1,2-bdc){sub 3}(H{sub 2}O){sub 2} forms have been characterized by single-crystal analysis. Their structures consist of infinite inorganic chains of lanthanide-centered polyhedra linked to each other through the phthalate ligands in order to generate mixed organic-inorganic layered structure. The two hydrated structures differ by the number of terminal water species attached to the lanthanide cations, which induce symmetry change from a triclinic (Nd{sub 2}(1,2-bdc){sub 3}(H{sub 2}O){sub 2}) to an orthorhombic (Nd{sub 2}(1,2-bdc){sub 3}(H{sub 2}O){sub 2}) cell for neodymium whereas the cerium-based phase only exists in the monohydrated form, with two distinct symmetries (orthorhombic or triclinic). Structural comparisons with the other members of the lanthanide phthalate series with identical chemical formula are also discussed. Thermal X-ray diffraction experiment indicates that the transformation from dihydrate form into the monohydrated form does not occur during a heating process. - Graphical abstract: New members of the chain-like structures of neodymium phthalates with different hydration states Nd{sub 2}(1,2-bdc){sub 3}(H{sub 2}O){sub x} (x=1 or 2, 1-2bdc=phthalate group) and comparison with cerium-based analogs.
- OSTI ID:
- 21432463
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 9 Vol. 183; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
ALCOHOLS
CARBOXYLIC ACID SALTS
CARBOXYLIC ACIDS
CERIUM COMPOUNDS
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DICARBOXYLIC ACIDS
DIFFRACTION
ETHANOL
HEATING
HYDRATES
HYDRATION
HYDROGEN COMPOUNDS
HYDROTHERMAL SYNTHESIS
HYDROXY COMPOUNDS
LIGANDS
MONOCRYSTALS
NEODYMIUM COMPOUNDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORTHORHOMBIC LATTICES
OXYGEN COMPOUNDS
PHTHALATES
PHTHALIC ACID
POLYMERS
RARE EARTH COMPOUNDS
SCATTERING
SOLVATION
SYNTHESIS
WATER
X-RAY DIFFRACTION
ALCOHOLS
CARBOXYLIC ACID SALTS
CARBOXYLIC ACIDS
CERIUM COMPOUNDS
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DICARBOXYLIC ACIDS
DIFFRACTION
ETHANOL
HEATING
HYDRATES
HYDRATION
HYDROGEN COMPOUNDS
HYDROTHERMAL SYNTHESIS
HYDROXY COMPOUNDS
LIGANDS
MONOCRYSTALS
NEODYMIUM COMPOUNDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORTHORHOMBIC LATTICES
OXYGEN COMPOUNDS
PHTHALATES
PHTHALIC ACID
POLYMERS
RARE EARTH COMPOUNDS
SCATTERING
SOLVATION
SYNTHESIS
WATER
X-RAY DIFFRACTION