Syntheses, structures and luminescent properties of new lanthanide-based coordination polymers based on 1,4-benzenedicarboxylate (bdc)

Abstract

Reaction of 1,4-benzenedicarboxylic acid (1,4-H2BDC) with EuCl(3).6H2O in MeOH in the presence of Et3N and MeCN gives a mixture of the 3-D metal-organic-framework (MOF) materials [Eu2(1,4-BDC)3(MeOH)4].8MeOH (1) and 2-D [Eu(1,4-BDC)(MeOH)4].Cl.MeOH.0.25H2O (2). Similar reactions afforded the isomorphous Gd (3) and Tb (4) analogs of 2. Reaction of 1,4-H2BDC with Ln(NO3)(3).6H2O under similar conditions gave [Ln(BDC)NO3(MeOH)2].MeCN.H2O (Ln = Eu (5) and Gd (6)), which have 2-D framework structures. The structures of 1-6 were determined by single crystal X-ray crystallographic studies and the luminescence properties of 1 and 4 in DMF solution were determined.

Three‐Dimensional Open‐Frameworks Based on LnIIIIons and Open‐/Closed‐Shell PTM Ligands: Synthesis, Structure, Luminescence, and Magnetic Properties

“…The first one is responsible for the green luminescence observed in 4'. [65,66] Photoemission/-excitation spectra for compound 2' are shown in Figure 6. The low-resolution PL spectrum obtained at 298 K was improved by working at 10 K (Figure 6a) F n metal transitions (for n = 0-5, respectively).…”

Extending the lanthanide–terephthalate system: Isolation of an unprecedented Tb(III)-based coordination polymer with high potential porosity and luminescence properties

“…This rode-like non-toxic ligand has led to numerous archetypical transition metal-based coordination polymers [3][4][5][6]. Since the pioneer work of Reineke et al [7,8], this ligand also allows to elaborate lanthanide-based compounds [9][10][11][12][13][14][15][16][17][18] with interesting potential porosity [8,[19][20][21][22][23][24][25][26] and/or luminescent [7,[27][28][29][30][31][32][33] properties (Table 1). On the other hand our group is involved for several years in the synthesis of octahedral hexanuclear lanthanide-based complex and their use as molecular Table 1 Reported structural properties of lanthanide-based coordination polymers involving bdc [2-7-33,36].…”

Frameworks by Solvent‐Free Synthesis of Rare Earth Chlorides with Molten 1,3‐Benzodinitrile and Tailoring of the Particle Size: ∞3[LnCl3{1,3‐C6H4(CN)2}], Ln = Y, Dy, Ho, Er, Yb

“…[1,2] Nonetheless, particle size is important as it can directly influence the properties of a compound. This treatment is especially useful for the highly oxophilic rare earth elements, [9][10][11] if cocoordination of solvents is to be avoided, as shown for organic amides of the rare earth elements. In the domain of coordination polymer, framework and MOF chemistry including rare earth compounds, nearly all treatments and reactions are carried out in solution and either give crystalline or microcrystalline products.…”