Lanthanide–organic assemblies with pyrazinetetracarboxylic and benzophenone-3,3′,4,4′-tetracarboxylic acids

An electrodeposited lanthanide MOF thin film as a luminescent sensor for carbonate detection in aqueous solution

“…As reported in the literature, 37 the powder of Eu-HBPTC was prepared as follows: 32 mg (0.1 mmol) benzophenone-3,3 0 ,4,4 0tetracarboxylic dianhydride (BTDA), 45 mg (0.1 mmol) europium nitrate hexahydrate and demineralized 2 mL water were placed in a 10 mL Teon-lined stainless-steel vessel and heated at 180 C for 3 days under autogenous pressure. Aer the reaction mixture was cooled down to room temperature, the powder of Eu-HBPTC was ltered off, washed with distilled water, and dried in air.…”

“…However, the XRD patterns show poor crystallinity but generally matches the theoretical spectrum. 37,45 The lack of crystallinity could be due to the lm drying before or during XRD analysis, leading to lm degradation. 23 Attempts to improve crystallinity of Eu-HBPTC lms and powder have thus far been unsuccessful.…”

“…The resulting packing forms a narrow channel to accommodate the solvent molecules. 37 However, the study on Eu-HBPTC was limited to investigations of the fundamental synthesis and structural analysis. The detailed spectroscopic analyses, such as excitation spectra and some other functions interrelated with the luminescence spectra, are still unknown.…”

Complex three-dimensional lanthanide metal–organic frameworks with variable coordination spheres based on pyrazine-2,3,5,6-tetracarboxylate

“…24,[28][29][30][31][32][33] Also, in our attempts to synthesize structures that incorporate 3,6-dimethylpyrazine-2,5-dicarboxylate and/or 2,2′-bpyridine as co-ligands in similar mole ratios as above, it was observed that the structures were resistant to incorporating these additional ligands under the synthesis conditions explored, as indicated by single crystal X-Ray analysis. In addition to the ligand to metal mole ratio of 1 : 0.75 used for the structures of 1 and 2, syntheses were also conducted using ratios of 1 : 1.3, 1 : 1.5 and 1 : 2.0.…”

“…The fully deprotonated ligand is widely reported for the synthesis of CPs and MOFs mainly in combination with selected s-and d-block metal ions. 30 They also reported the use of the actinide element, uranium, (as UO 2 species) in the synthesis of a 3-D IJUO 2 ) 2 -pztc MOF structure. 27 All, except Cd, crystallize as 1-D chains or 2-D layered CPs.…”