Synthesis, Characterisation and Luminescent Properties of Lanthanide‐Organic Polymers with Picolinic and Glutaric Acids

Abstract

Three new lanthanide(III) complexes (Ln = Sm, Tb and Eu) of picolinic and glutaric acid were prepared and characterised. The crystal structure of the complex [Sm(glu)(pic)(H2O)2] (where Hpic and H2glu stand for picolinic and glutaric acid, respectively) was determined by single‐crystal X‐ray diffraction. All the Ln complexes were characterised by elemental analysis, infrared spectroscopy, X‐ray powder diffraction and thermoanalytical measurements. The combined data show that these Ln complexes are isostructural. The effect of both organic ligands on the photoluminescent behaviour of the Sm3+, Eu3+ and Tb3+ complexes is discussed and we anticipate the possibility of controlling the photoluminescence of picolinic‐containing lanthanide compounds by systematically varying the length of the bridging ligand. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)

Three‐Dimensional Porous Metal–Radical Frameworks Based on Triphenylmethyl Radicals

“…The room-temperature excitation spectrum of 1' for l em = 543 nm shows two absorption bands at 275 and 321 nm, corresponding to pÀp* transitions in the aHÀPTMTC ligand and to 4dÀ5f transitions for the Tb III ion, respectively. [48] The emission spectrum obtained upon excitation at 323 nm shows the typical emission bands for Tb III at 488, 543, 584, 620, 649, 658, and 681 nm, which correspond to the well-documented [49] The Tb III ion ( 5 D 4 ) lifetime of compound 1' at an excitation of 350 nm and emission of 543 nm is 0.59 ms (see the Supporting Information, Figure S7). Photoemission/excitation spectra for compound 3' are shown in Figure 6.…”

Synthesis, structure and luminescence of a new series of rigid–flexible lanthanide coordination polymers constructed from benzene sulfonic acid and glutaric acid

“…These complexes only contain flexible ligand as lanthanide metal linkers. (ii) Ln-glu-aromatic/heterocyclic, such as: [Ln(2,2-bipy)(glu)(NO 3 )] (Ln = Eu, Tb, Sm, and Pr) [34]; Ln(H 2 O)(ip) 0.5 (glu 2 ) (Ln = Gd, Dy, and Y; H 2 ip = m-phthalic acid) [35]; [Ln(glu) (pic)(H 2 O) 2 ] (Hpic = picolinic acid; Ln = Sm, Tb, and Eu) [36]; Ln(2,5-pydc)(Hglu)(H 2 O) (Ln = Nd, Pr; 2,5-pydc = 2,5-pyridine dicarboxylic acid) [37]. In these complexes, both rigid and flexible polycarboxylates as mixed linkers connected the lanthanide metals.…”

Synthesis, Crystal Structure and Antimicrobial Properties of an Anhydrous Copper(II) Complex of Pyridine-2-Carboxylic Acid

“…) show interesting photoluminescent behaviour (Girginova et al 2007). Iron, manganese, cobalt, nickel, zinc and copper picolinates do exhibit antimicrobial properties against some pathogens (Kalinowska et al 2007, Oladipo et al 2013.…”

“…A literature survey of the reported crystal structures of picolinic acid with diverse metal ions indicates picolinic acid exhibits different bonding modes which include monodentate through oxygen atom of the carboxyl group or through its pyridine nitrogen atom and bidentate through nitrogen and oxygen atoms (Yasui et al 2002, Kalinowska et al 2007. The ligand can also form polynuclear complexes in which it acts as a bridge between metal ions (Wu et al 2005, Girginova et al 2007. The N, O-chelating bonding mode and H-bonding between the carboxylate moiety and water molecules are predominant (Kalinowska et al 2007, Kukovec et al 2013).…”