Nitroaromatic sensing with a new lanthanide coordination polymer [Er₂(C₁₀H₄O₄S₂)₃(H₂O)₆]_n assembled by 2,2′-bithiophene-5,5′-dicarboxylate

Abstract

A new three dimensional lanthanide-containing coordination polymer assembled from 2,2′-bithiophene-5,5′-dicarboxylic acid ([Ln2(C10H4O4S2)3(H2O)6]n, Ln = Sm–Yb) was solvothermally synthesized and used as a sensor to detect nitroaromatic compounds via luminescence quenching.

3D Metal–Organic Frameworks Based on Co(II) and Bithiophendicarboxylate: Synthesis, Crystal Structures, Gas Adsorption, and Magnetic Properties

“…All title MOFs share the same trinuclear carboxylate building blocks {Co 3 (RCOO) 6 }, connected in three dimensions either by btdc 2-ligands (1, 3) or by both btdc 2and pz bridging ligands (2). The metal-organic frameworks in 1 and 3 belong to primitive cubic topology while 2 features complex 6-connected network with point symbol 4 10 .6 5 . The permanent porosity of the thermally-activated framework 1 was confirmed by N 2 , CO 2 , CO, O 2 and CH 4 adsorption isotherm measurements at various temperatures.…”

“…Red 2-and pz bridging ligands in three directions (Figure 3). Despite a higher number of potential linkers, the connectivity of the {Co 3 (btdc) 3 (pz)} complexes in 2 is 6 because four btdc 2ligands form two double bridges, which results in a complex uninodal 6-connected topology of the framework with point symbol 4 10 .6 5 . To the best of our knowledge, such topology has never been mentioned or characterized in the literature.…”

“…The ligand synthesis was carried out according to the known methodology [10]. The starting substances were used as commercially available reagents without further purification.…”

“…Such type of ligands can also support the magnetic interaction between the paramagnetic centers; however, the corresponding constants of the magnetic exchange in e.g., terephthalate-based MOFs are, typically, rather low [6][7][8]. Recently several research groups synthesized a number of MOFs using rigid thiophene-and selenophene-based heterocyclic carboxylate ligands [9][10][11][12][13]. The introduction of such heterocyclic aromatic moieties was shown to remarkably improve the adsorption properties of the MOFs [14][15][16][17][18] and also enhances their luminescence [19][20][21][22][23][24].…”

Tuning the Behavior of a Hydrotalcite-Supported Sulfonated Bithiophene from Aggregation-Caused Quenching to Efficient Monomer Luminescence

“…and CSD-QEDMAQ (containing the anion 2,2′-bithiophene-5,5′-dicarboxylate). 41 A credible model for the interlayer orientation of the bithiophene guest in a2-SO 3-LDH can be advanced by considering that the following criteria must be met: (i) hydrogen-bonding interactions between the sulfonate oxygen atoms and the layer hydroxyl groups should be maximized, while positioning the hydrophobic bithiophene moiety in the centre of the interlayer region; (ii) the orientation must be consistent with a gallery height of 9.0 Å (taking into account van der Waals (vdW) radii for the sulfonate oxygen atoms); (iii) the anionic guest must be spatially capable of compensating the host layer positive charge.…”