Tossing and Turning: Guests in the Flexible Frameworks of Metal(III) Dicarboxylates

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• 作者：Marie Vougo-Zanda ; Jin Huang ; Ekaterina Anokhina ; Xiqu Wang ; Allan J. Jacobson
• 刊名：Inorganic Chemistry
• 出版年：2008
• 出版时间：December 15, 2008
• 年：2008
• 卷：47
• 期：24
• 页码：11535-11542
• 全文大小：312K
• 年卷期：v.47,no.24(December 15, 2008)
• ISSN：1520-510X

文摘

Single crystals of Ga(OH)(C₈H₄O₄)·0.74C₈H₆O₄ (2) and Ga(OH,F)(C₈H₄O₄)·0.74C₈H₆O₄ (3) were obtained under hydrothermal conditions. The structures of 2 and 3 have the same topological framework as the previously reported aluminum 1,4-benzenedicarboxylate (BDC), Al(OH)(C₈H₄O₄)·0.7C₈H₆O₄ (1). The frameworks are built by interconnecting M−OH−M chains (M = Al, Ga) with BDC anions to form large diamond-shaped one-dimensional channels filled with additional H₂BDC guest molecules occupying disordered positions in the channels. Upon removal of H₂BDC, other guest molecules such as H₂O and pyridine can be inserted. In this work, we present a study of the intercalation of aromatic guests (BDC and pyridine) into frameworks of 1−3 by liquid and vapor diffusion into the empty channels of 1 and by single-crystal-to-single-crystal solvothermal guest exchange for 2 and 3. In the case of Al(OH)BDC and Ga(OH,F)BDC, two interconvertible, guest-concentration-dependent phases with different orientations of the pyridine guests have been observed, while only one pyridine orientation is found in Ga(OH)BDC.