Spectroscopy of Eu3+ and Tb3+ pyridine- and pyrazine-2-carboxylates

Thermodynamic study of Eu(III) complexation by pyridine monocarboxylates

“…Pyridine monocarboxylates, such as, picolinate, nicotinate and isonicotinate have been widely used to build lanthanide complexes and coordination networks [8] because those molecules with nitrogen and oxygen atoms could efficiently transfer energy to lanthanide ion [9][10][11][12][13][14]. Also the lanthanide complexes of polydentate ligands containing picolinate pendants are of potential interest for application in time-resolved luminescence imaging [15,16].…”

“…Most of the studies on determining thermodynamic quantities of the complexation of pyridine monocarboxylic acids in solution are concerned with transition metals [24][25][26][27][28][29]. A large number of crystallographic and spectroscopic studies on lanthanides pyridine carboxylates and their derivatives were done to explore their luminescence properties for various applications [8][9][10][11][12][13][14][15][16][17], and there are only few studies on the thermodynamics of complexation of rare earths with picolinate [30][31][32][33] and nicotinate [34]. But the log K values differ significantly from one another and the uncertainty in determining the values of formation constants for higher complexes are also high.…”

A facile building-block synthesis of multifunctional lanthanide MOFs

“…The lifetimes obtained for Euand Tb-MOFs are slightly shorter than those observed for compounds involving organic ligands with similar excited triplet state levels (de-excitation process involving the excited triplet state of the ligands). 26,27 This reflects the direct coordination of water molecules to the Eu(III) and Tb(III) ions.…”

Novel solid-state compounds of heavy rare-earth (III) picolinates. A pyrolytic study using: TG-DSC-IR, HSM-MS and GC-MS

“…europium and terbium), which affords mechanoluminescent complexes [10]. Studies implementing the complexation of trivalent rare-earth with derivatives of picolinate have also been explored, aiming to further improve the luminescence and the energy transfer between the ligand and lanthanide [11][12]. The literature reports the functionalization of picolinates to form compounds such as; dipicolinate, N-oxide picolinate [13][14][15][16][17][18], 3hydroxypicolinate, and 3,5-dipicolinate, as well as the introduction of picolinate on a triazacyclononane ring system [13][14][15][16][17], studies about picolinate salts with rare-earth were also found [19].…”