Hydrothermal Synthesis and Characterization of Novel Lanthanide 2,2′-Diphenyldicarboxylate Complexes

✍ Scribed by Yi-Bo Wang; Xiang-Jun Zheng; Wen-Juan Zhuang; Lin-Pei Jin

• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 141 KB
• Volume: 2003
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/ejic.200390175

✦ Synopsis

Abstract

Lanthanide complexes with a one‐dimensional chain, [Ln~2~(dpdc)~3~(H~2~O)~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 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 highresolution spectrum (resolution: 0.2 cm^−1^) of 3 was obtained, which shows two Eu^3+^ sites in 3. This is in agreement with the results of single‐crystal X‐ray diffraction studies of 3. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)