Zeolite-like Nanoporous Gadolinium Complexes Incorporating Alkaline Cations

详细信息    查看全文

• 作者：Laura Cañ ; adillas-Delgado ; Ó ; scar Fabelo ; Catalina Ruí ; z-Pé ; rez ; Fernando S. Delgado ; Miguel Julve ; Marí ; a Herná ; ndez-Molina ; M. Milagros Laz ; and Pablo Lorenzo-Lui
• 刊名：Crystal Growth & Design
• 出版年：2006
• 出版时间：January 2006
• 年：2006
• 卷：6
• 期：1
• 页码：87 - 93
• 全文大小：621K
• 年卷期：v.6,no.1(January 2006)
• ISSN：1528-7505

文摘

In this article, we describe the synthesis and single-crystal X-ray structural studies of two new lanthanide complexesof formula [M^ILn^III(bta)(H₂O)₃]·nH₂O, (M = Na (1), K (2); Ln = Gd; H₄bta = 1,2,4,5-benzenetetracarboxylic acid) to check theability of rare earth ions to lead to high-dimensional materials. The crystal structures of 1 and 2 can be described as a successionof layers made up of chains with regular alternation of pairs of Gd³⁺ and Na⁺ or K⁺ ions that are connected by bta^4- groups. Bothstructures contain a nine-coordinated gadolinium(III) cation ion and fully deprotonated bta^4- anion. However, the alkaline cationsexhibit different coordination numbers, seven (Na⁺) and nine (K⁺). The structures accommodate crystallization and coordinationwater molecules, and it was observed that the water molecules have a significant influence on the coordination geometry and on theoverall extended structure. These compounds may be considered as novel nanocomposites of unusual structures within thebenzenetetracarboxylate frameworks.