Metal Organic Frameworks Assembled from Y(III), Na(I), and Chiral Flexible-Achiral Rigid Dicarboxylates

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• 作者：Zakariae Amghouz ; Laura Roces ; Santiago Garca-Granda ; Jos R. Garca ; Badredine Souhail ; Lus Mafra ; Fa-nian Shi ; Joo Rocha
• 刊名：Inorganic Chemistry
• 出版年：2010
• 出版时间：September 6, 2010
• 年：2010
• 卷：49
• 期：17
• 页码：7917-7926
• 全文大小：1325K
• 年卷期：v.49,no.17(September 6, 2010)
• ISSN：1520-510X

文摘

New chiral metal organic frameworks, assembled from Y(III), Na(I), and chiral flexible-achiral rigid dicarboxylate ligands, formulated as [NaY(Tart)(BDC)(H₂O)₂] (1) and [NaY(Tart)(biBDC)(H₂O)₂] (2) (H₂Tart = Tartaric acid; H₂BDC = Terephthalic acid; H₂biBDC = Biphenyl-4,4′-dicarboxylic acid), were obtained as single phases under hydrothermal conditions. Their structures were solved by single-crystal X-ray diffraction (XRD), and characterized by ¹³C CPMAS NMR, thermal analyses (thermogravimetry-mass spectrometry (TG-MS) and differential scanning calorimetry (DSC)), and X-ray thermodiffractometry. Both compounds crystallize in the orthorhombic chiral space group C222₁ with a = 6.8854(2) Å, b = 30.3859(7) Å, c = 7.4741(2) Å for 1, and a = 6.8531(2) Å, b = 39.0426(8) Å, c = 7.4976(2) Å for 2. 1 and 2 are layered structures whose three-dimensional stability is ensured by strong hydrogen bond interactions. The dehydration of both compounds is accompanied by phase transformation, while the spontaneous rehydration process is characterized by different kinetics, fast in the case of 1 and slow for 2.