Crystal Engineering Gone Awry. What a Difference a Few Methyl Groups Make in Fullerene/Porphyrin Cocrystallization

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• 作者：Kamran B. Ghiassi ; Xian B. Powers ; Joseph Wescott ; Alan L. Balch ; Marilyn M. Olmstead
• 刊名：Crystal Growth & Design
• 出版年：2016
• 出版时间：January 6, 2016
• 年：2016
• 卷：16
• 期：1
• 页码：447-455
• 全文大小：617K
• ISSN：1528-7505

文摘

Two related nickel(II) porphyrins, etioporphyrin-I (Etio-I) and octaethylporphyrin (OEP), were cocrystallized with C₇₀ to produce the new cocrystal structures C₇₀·Ni(Etio-I)·2C₆H₆ and C₇₀·Ni(OEP)·2C₆H₆. Etio-I is a variant of OEP, where four alternating ethyl groups from OEP are replaced with methyl substituents. This isomer of etioporphyrin has the potential to act as an agent in chiral sorting of asymmetric fullerenes. However, the replacement of four ethyl groups has nontrivial structural consequences. Further host–guest investigation of M(Etio-I) (M = Co, Ni, Cu, Zn) with C₆₀ or C₇₀ was conducted, producing new X-ray structures of Co(Etio-I) and Zn(Etio-I), and a redetermination of Ni(Etio-I). Despite numerous and varied attempts, C₆₀ cocrystallized with M(Etio-I) could not be obtained.