Guangfeng Hou, Ruiqiang Ding, Pengfei Yan
Jan 15, 2013
Citations
0
Influential Citations
4
Citations
Journal
Synthetic Metals
Abstract
Abstract Reactions of 3-pyridin-3-yl-benzoic acid (HL 1 ) and 3-pyridin-4-yl-benzoic acid (HL 2 ) with lanthanide nitrate hexahydrate under hydrothermal conditions yield four new coordination polymers, namely [Sm 2 (L 1 ) 6 (H 2 O) 4 ] n ( 1 ) and [Ln(L 2 ) 3 (H 2 O) 2 ·H 2 O] n (Ln = Nd ( 2 ), Gd ( 3 ) and Er ( 4 )). X-ray diffraction analysis reveals that 1 is of one-dimensional (1D) zigzag chain arrays featuring two different lanthanide ion centers. In contrast, complexes 2 – 4 exhibit 1D linear chain arrays exhibiting only one crystallographically distinct lanthanide ion. In addition, two known complexes [Ln(L 2 ) 3 (H 2 O) 2 ·H 2 O] n (Ln = Eu ( 5 ), Tb ( 6 )), are also synthesized as well as their triplet energy-levels are investigated, the results reveal that both complexes 5 and 6 are able to emit intensively characteristic red and green luminescence of the Eu 3+ and Tb 3+ ions with luminescence lifetime of 386.3 μs and 715.8 μs, respectively. Further, magnetic analysis suggests that complex 3 is of an antiferromagnetic character.