Variable Dimensionality of Europium(III) and Terbium(III) Coordination Compounds with a Flexible Hexacarboxylate Ligand

Abstract

A reaction between 4,4′,4″-(benzene-1,3,5-triyltris(oxy))triphthalic acid (H6L) and lanthanide(III) nitrates (Ln = Eu3+, Tb3+) in water under the same conditions gave a molecular coordination compound [Tb(H4.5L)2(H2O)5]∙6H2O in the case of terbium(III) and a one-dimensional linear coordination polymer {[Eu2(H3L)2(H2O)6]∙8H2O}n in the case of europium(III). The crystal structures of both compounds were established by single-crystal X-ray diffraction, and they were further characterized by powder X-ray diffraction, thermogravimetric analysis and infrared spectroscopy. The compounds demonstrated characteristic lanthanide-centered photoluminescence. The lanthanide-dependent dimensionality of the synthesized compounds, which are the first examples of the coordination compounds of hexacarboxylic acid H6L demonstrates its potential as a linker for new coordination polymers.

Highly Luminescent Lanthanide Metal‐Organic Frameworks with Tunable Color for Nanomolar Detection of Iron(III), Ofloxacin and Gossypol and Anti‐counterfeiting Applications

“…In our previous work, [22] a 3D Tb‐based MOF showed excellent detection of gossypol with very low detection limits in water (LOD 0.76 nM), but the sensing response was slow, requiring at least 20 min for each measurement. Taking into account the fast response of NIIC‐1‐Tb towards Fe 3+ and OFX, its sensing performance for gossypol was evaluated.…”

“…For the luminescent detection of gossypol, a problem of low detection limit is also faced, and an example of gossypol detection in water was only reported in our previous work, [22] but the sensing response was rather long (20 min), so a sensing material for rapid detection of gossypol in water is still in demand.…”

Luminescent metal–organic frameworks as optical sensors for selective sensing towards Fe3+ and Cu2+

“…7). 74 NIIC-1-Tb exhibits excellent sensing properties through a luminescence quenching effect and has extremely low detection limits for Fe 3+ (LOD = 8.62 nM), OFX antibiotics (LOD = 3.91 nM), and cotton toxin gossypol (LOD = 2.27 nM). In addition to low detection limits and high selectivity, NIIC-1-Tb has a fast sensing response (within 60-90 seconds), making it superior to other MOFbased metal cation and organic poison sensors.…”

An acid-chromic luminescent lanthanide metallogel for time-dependent information encryption and anti-counterfeiting

“…Lanthanide metallogels, driven by dynamic coordination interactions, π-π stacking, hydrogen bonding, van der Waals forces, or other intermolecular non-covalent interactions, offer distinct advantages in the realms of information encryption and anti-counterfeiting. [7][8][9] These advantages stem not only from their unique optical properties-long luminescence lifetimes, good monochromaticity, and large Stokes shifts-but also from their stimulus-responsive characteristics. 10,11 Several studies have provided inspiring ideas for designing lanthanide metallogels to enhance information security.…”