Two New Adenine-Based Co(II) Coordination Polymers: Synthesis, Crystal Structure, Coordination Modes, and Reversible Hydrochromic Behavior

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• 作者：Iv谩n Burneo ; Kyriakos C. Stylianou ; Sabina Rodr铆guez-Hermida ; Jordi Juanhuix ; Xavier Fontrodona ; Inhar Imaz ; Daniel Maspoch
• 刊名：Crystal Growth & Design
• 出版年：2015
• 出版时间：July 1, 2015
• 年：2015
• 卷：15
• 期：7
• 页码：3182-3189
• 全文大小：550K
• ISSN：1528-7505

文摘

We report the synthesis of two new three-dimensional coordination polymers (CPs) based on Co(II), adenine, and aromatic tetracarboxylate linkers. Adenine exhibits bidentate binding modes in both CPs, coordinating through the N₃ and N₉ sites in a first compact CP and through the more rare N₃ and N₇ sites in a second open, flexible, and H₂O-responsive CP. These differences together with an analysis of the extended coordination structures made of adenine reported in the Cambridge Structural Database illustrate the rich coordination versatility of adenine as a building block for CPs. Although the latter CP is nonporous to N₂ or CO₂, it shows a reversible and detectable color change from pink to purple, and vice versa, upon hydration and dehydration, respectively.