Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/19187
Title: Layered Metal-Organic Frameworks Based on Octahedral Lanthanides and a Phosphonate Linker: Control of Crystal Size
Author: Paz, Filipe A. Almeida
Vilela, Sergio M. F.
Tome, Joao P. C.
Keywords: COORDINATION POLYMERS
MAGNETIC-PROPERTIES
OXALIC-ACID
CAPTURE
CONTRACTION
COMPLEXES
LUMINESCENCE
TOPOLOGIES
LIGANDS
STORAGE
Issue Date: 2014
Publisher: AMER CHEMICAL SOC
Abstract: The hydrothermal reaction between lanthanide salts and residues of (benzene-1,3,5-triyltris(methylene))triphosphonic acid (H(6)bmt) promotes the formation of a new series of isotypical layered lanthanideorganic frameworks (LnOFs), [Ln(2)(H(3)bmt)(2)]center dot H2O [where Ln(3+) = Eu3+ (1), Gd3+ (2), Tb3+ (3), Dy3+ (4), Ho3+ (5), Er3+ (6), Tm3+ (7), and Yb3+ (8)]. The crystal structure was unveiled from powder X-ray diffraction data (both laboratory and synchrotron) in tandem with other characterization techniques (namely thermogravimetry, thermodiffractometry, vibrational spectroscopy, and elemental analysis). It is shown that the lanthanide contraction leads, on average, to a reduction of the average crystallite size, up to the nanometer scale in the case of compound 8. The unique structural features of the (2)(infinity)[Ln(2)(H(3)bmt)(2)] layers are discussed in detail, in particular, the six-coordination environment of the lanthanide cations and its topological relationship with the formation of the first 5,5L4 binodal network based on chelating phosphonate groups.
Peer review: yes
URI: http://hdl.handle.net/10773/19187
DOI: 10.1021/cg500875m
ISSN: 1528-7483
Publisher Version: 10.1021/cg500875m
Appears in Collections:CICECO - Artigos



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