Synthesis, crystal structure and luminescent properties of new lanthanide-containing coordination polymers involving 4,4′-oxy-bis-benzoate as ligand

• DOI: 10.1039/c2ce26390d
• Publication Date: 2012-11-07T16:02:29Z
• Authors: Yun Luo; Yanjun Zheng; Guillaume Calvez; Stéphane Freslon; Kevin Bernot; Carole Daiguebonne; Thierry Roisnel; Olivier Guillou
• Keywords: Isostructural; Monoclinic crystal system; Benzoic acid

Reactions in water between the disodium salt of 4,4′-oxy-bis-benzoic acid (H2oba) and lanthanide chlorides lead to three families coordination polymers with respective general chemical formulae [Ln2(oba)3(H2O)5·H2O]∞ Ln = La–Nd (Family 1), [Ln2(oba)3(H2O)6·3H2O]∞ Sm–Ho or Y 2) [Ln2(oba)3(H2O)5.5·0.5H2O]∞ Sm–Dy 3). Compounds that belong Family 1 are isostructural. The crystal structure has been solved on basis La-containing compound. This compound crystallizes monoclinic system, space group P2/n (no. 13) a 23.622(4) Å, b 6.066(1) c 29.414(6) β 102.034(7)°, V 4129.0(13) Å3 Z 4. 2 Gd-containing P2/a 14) 9.9474(1) 15.6416(2) 28.7511(4) 95.117(1)°, 4455.65(10) 3 C2/c 15) 59.6523(11) 8.2064(1) 16.9558(2) 95.447(1)°, 8262.9(2) structures three-dimensional rather compact. Their potential porosities low. They have estimated as 95 m2 g−1, 113 36 g−1 respectively. luminescent properties under UV irradiation these compounds explored. In particular, quantum yields, lifetimes colorimetric coordinates Tb- Eu-containing determined. A heteronuclear polymer formula [EuTb(oba)3(H2O)5.5·0.5H2O]∞ synthesized characterized. It belongs structural family 3. Its explored detail order better understand energy transfer mechanisms evaluate tunability compounds.