Layered Porphyrin Coordination Polymers Based on Zinc···Nitro Recognition: Reversible Intercalation of Nitrobenzene

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• 作者：Salimgerey Adilov ; Venkat R. Thalladi
• 刊名：Crystal Growth & Design
• 出版年：2007
• 出版时间：March 2007
• 年：2007
• 卷：7
• 期：3
• 页码：481 - 484
• 全文大小：286K
• 年卷期：v.7,no.3(March 2007)
• ISSN：1528-7505

文摘

A new coordination synthon, Zn···NO₂ recognition, is used in the synthesis of a layered porphyrin coordination polymer(Zn-5,15-di(4-nitrophenyl)-10,20-di(p-tolyl)-porphyrin, 1-Zn) with 4⁴ topology. This solid is thermally stable and incorporates nitrobenzenemolecules between the layers to form 1-Zn-PhNO₂. The Zn···NO₂ recognition exists in 1-Zn and 1-Zn-PhNO₂; it is formed by coordinationbonding between a Zn²⁺ ion embedded in a porphyrin core and one of the O-atoms of the nitro group. The structure of 1-Zn-PhNO₂ isalso layered and contains 4⁴ networks such as those found in 1-Zn. The two structures, however, differ significantly in several intra- andinterlayer parameters. Despite these differences, removal of nitrobenzene from the crystals of 1-Zn-PhNO₂ yields crystalline 1-Zn. Whensoaked in nitrobenzene, these desolvated 1-Zn crystals yield crystalline 1-Zn-PhNO₂. These reversible solid-to-solid transformationsdemonstrate the robustness of Zn···NO₂ recognition in holding the 4⁴ networks together in the solid state.