Thermodynamics of complexation of lanthanides by 3-fluoro- 4-fluoro- and 3-nitrobenzoic acids

Abstract

of 2, 4, 5, and 7, tables of rms amplitudes of thermal vibration for 2, 4, position region for 4 (23 pages); tables of structure factors (58 pages), and 5, and figures showing the special position and general equivalent Ordering information is given on any current masthead page.

2-Chloro-5-nitrobenzoato complexes of Eu(III) and Tb(III) – A 1D coordination polymer and enhanced solution luminescence

“…Only recently did our group describe a nitrobenzoic acid derivative as a sensitizer for luminescent lanthanide complexes [3]. Ferenc and co-workers [4,5] as well as Choppin and co-workers [6] have been previously interested in nitrobenzoic acid derivatives, chloronitrobenzoic acid and fluoronitrobenzoic acid, as ligands for lanthanide ions but did not report any luminescence behavior. Ferenc found evidence, through elemental analysis results, of the formation of 3:1 complexes (L:M) [4] in the solid state and Choppin noted that in solution the 1:1 species form preferentially, with the 2:1 species being present in only negligible amounts [6].…”

“…Ferenc and co-workers [4,5] as well as Choppin and co-workers [6] have been previously interested in nitrobenzoic acid derivatives, chloronitrobenzoic acid and fluoronitrobenzoic acid, as ligands for lanthanide ions but did not report any luminescence behavior. Ferenc found evidence, through elemental analysis results, of the formation of 3:1 complexes (L:M) [4] in the solid state and Choppin noted that in solution the 1:1 species form preferentially, with the 2:1 species being present in only negligible amounts [6]. Our previous report of complexes of 2-nitro-4-thiophen-3-ylbenzoate with Eu(III) and Tb(III) agrees with those findings, as in the solid state three ligands are present for each metal ion and in solution 1:1 species are preferentially formed [3].…”

Luminescent Ln3+ nitrobenzoato complexes: first examples of sensitization of green and red emissionElectronic supplementary information (ESI) available: absorption and excitation spectra of 1 and 2 in ethanol. See http://www.rsc.org/suppdata/cc/b4/b402038c/

“…4 Other studies involving nitrobenzoic acid derivatives dealt only with the thermal stability of lanthanide complexes of 4-and 5-chloro derivatives of 2-, 3-and 5-nitrobenzoic acid, 5 and the thermodynamics of complexation of lanthanide complexes of 3-nitrobenzoic acid. 6 To date, the modus of coordination of the ligand to the lanthanide has been the subject of speculation.…”

Crystal structure of bis-aqua(μ4-pyridine-2,4,6-tricarboxylato-κ3N,O,O') cerium(III)-water(1:1), {[Ce(ptc)(H2O)2]·H2O}n, C8H8CeNO9

“…In recent years, the design and construction of metal-organic frameworks (MOF)isone of the most active areas of materials research owingtotheir fascinatingstructuraltopologies [2][3] and thepotential functional applications in magnetism [4], electrical conductivity, ion exchange, biology and molecular recognition [5],sensors [6],phase separation [7],luminescent materials [8][9][10], molecular adsorption [11],n onlinear optics and catalysis [12].Ingeneral, arational strategy for the preparation of MOFs is the careful selection of asuitable organic ligands and functional metal ions under hydrothermalc onditions. Among the organic ligands, pyridinylcarboxylic acids as amember of the multidentate aromatic polycarboxylic acids are good candidates for constructingMOFsdue to theexistenceofbothNand Oatoms in the ligands, which can link 3d,4for either both types of metal ions [20],and gives versatile coordination modes for ptc 3-.Herein, we present the synthesis, characterization and crystal structure of a novell anthanide-organicf ramework {[Ce(ptc)(H 2 O) 2 ]·H 2 O} n .…”