Luminescence, magnetism and structures of 1D 3-pyridin-yl-benzoic lanthanide coordination complexes

作者：Hou, Guangfeng; Ding, Ruiqiang; Yan, Pengfei^*; Li, Hongfeng; Chen, Peng; Li, Guangming

来源：Synthetic Metals, 2013, 164: 32-37.

DOI：10.1016/j.synthmet.2012.12.029

• Pyridine benzoate acid
• Lanthanide coordination polymer
• Crystal structure
• Luminescence
• Magnetism

Reactions of 3-pyridin-3-yl-benzoic acid (HL1) and 3-pyridin-4-yl-benzoic acid (HL2) with lanthanide nitrate hexahydrate under hydrothermal conditions yield four new coordination polymers, namely [Sm-2(L-1)(6)(H2O)(4)](n) (1) and [Ln(L-2)(3)(H2O)(2).H2O](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)(H2O)(2).H2O](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 Eu3+ and Tb3+ ions with luminescence lifetime of 386.3 mu s and 715.8 mu s, respectively. Further, magnetic analysis suggests that complex 3 is of an antiferromagnetic character.

• 出版日期2013-1-15
• 单位黑龙江大学