Synthesis, structural characterization and photophysical properties of highly photoluminescent crystals of Eu(III), Tb(III) and Dy(III) with 2,5-thiophenedicarboxylate

Controlling dimensionality via a dual ligand strategy in Ln-thiophene-2,5-dicarboxylic acid-terpyridine coordination polymers

“…While there have been a number of studies on Ln 3+ -2,5-TDC hybrids, [37][38][39][40][41][42][43][44] this is the first series of Ln 3+ -2,5-TDC materials where one can evaluate the effects of the addition of a coligand (terpy) on both the local structures and their subsequent modes of supramolecular assembly. We recently examined the evolution of local coordination geometries and modes of supramolecular assembly in a series of molecular Ln 3+ -p-chlorobenzoic acid-terpy materials, 49 and herein we extend this concept to coordination polymers, explored via the family of Ln 3+ -2,5-TDC-terpy hybrids described throughout.…”

“…25 800 cm −1 ) and has been used in a wide array of lanthanide coordination polymers over the past decade. First incorporated in a lanthanide hybrid material by Yaghi and colleagues in MOF-75, 37 2,5-TDC has remained a organic linker of interest in lanthanide hybrids due to the interesting luminescent [38][39][40][41][42] and magnetic properties 43,44 displayed by these materials. Structurally, all 54 Ln-2,5-TDC materials in the CSD (v. 5.36, Nov. 2014) 45 are three dimensional coordination polymers, and approximately onethird (17/54) of these materials feature some Ln 3+ oligomerization (dimers, chains, etc.).…”

Construction of a series of rare earth metal-organic frameworks supported by thiophenedicarboxylate linker: Synthesis, characterization, crystal structures and near-infrared/visible luminescence

“…It is important to emphasize that several previous reports of Metal-Organic Frameworks of rare earths with this ligand, discuss briefly the photophysical investigations presenting only the excitation/emission spectra [27][28][29][30][31][32][33][34]. The compounds studied in this work, together with the congeners reported by our group [11][12][13] presents a more detailed study of energy transfer process. Thus, in order to confirm the possibility of occurrence of antenna effect, the identification of the lowest triplet state of 2,5-tdc 2À ligand, was obtained from the emission phosphorescence spectrum (Fig.…”

“…The literature reports similar REMOFs containing 2,5-tdc 2À anion [11][12][13][27][28][29][30][31][32][33][34], with these species being highly crystalline, allowing the structural determination through single crystal X-ray diffraction analysis. However, in the present case, the crystallization process for the {[Pr 2 (2,5-…”

“…Taking advantage of the high affinity of rare earth ions for oxygen, a number of REMOFs with various dimensionality and topologies have been synthesized from multicarboxylate ligands [9,10]. In this paper, we chose the rigid ligand 2,5-thiophenedicarboxylic acid (2,5-H 2 tdc) to promote the formation of extended REMOFs structures, which exhibit high connectivity, stabilize bridges among several metal centers [11][12][13], adopting several coordination modes, and producing multidimensional networks, including 2D and 3D structures. Given the important potential applications, we described the synthesis, characterization, structures and luminescence properties of rare earth metal-organic frameworks of general formula {[RE 2 (2,5-tdc) 3 (dmso) 2 ]ÁH 2 O} n (RE = Y III , Pr III , Nd III , Sm III , Er III and Tm III ; 2,5-tdc 2À = 2,5-thiophenedicarboxylate anion; dmso = dimethylsulfoxide).…”