科研之友
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摘要
Lanthanide complexes with a one-dimensional chain, [Ln(2)(dpdC)(3)(H2O)(2)](n) [Ln = La (1), Pr (2), Eu (3), Tb (4); dpdc = 2,2'-diphenyldicarboxylate] were obtained by hydrothermal reaction of lanthanide(III) chlorides and 2,2'-diphenyldicarboxylic acid, and characterized by X-ray diffraction. The crystal structure data reveal that they are isostructural. In the asymmetric unit, the two Ln(3+) ions are both eight-coordinate but they have different coordination environments. Lanthanide ions arranged in a zigzag manner are bridged by the Lanthanide complexes with a one-dimensional chain, [Ln(2)(dpdc)(3)(H2O)(2)](n) [Ln = La (1), Pr (2), Eu (3), Tb (4); dpdc = 2,2'-diphenyldicarboxylatel were obtained by hydrothermal reaction of lanthanide(III) chlorides and 2,2'-diphenyldicarboxylic acid, and characterized by X-ray diffraction. The crystal structure data reveal that they are isostructural. In the asymmetric unit, the two Ln(3+) ions are both eight-coordinate but they have different coordination environments. Lanthanide ions arranged in a zigzag manner are bridged by the dpdc ligands into a 1-D chain, while the structure appears like a pinwheel viewed along the c axis. In these complexes, 2,2'-diphenyldicarboxylate anions exhibit tetradentate and pentadentate coordination modes. A laser-induced high-resolution spectrum (resolution: 0.2 cm(-1)) of 3 was obtained, which shows two Eu3+ sites in 3. This is in agreement with the results of single-crystal X-ray diffraction studies of 3.
- 出版日期2003-4
- 单位北京师范大学
