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Eunyoung Noh, Dr. Sunhong Park, Sunwoo Kang, Prof. Dr. Jin Yong Lee and Prof. Dr. Jong Hwa Jung Remarkable Reinforcement of a Supramolecular Gel Constructed by Heteroditopic [18]Crown-6-Based Molecular Recognition Chemistry - A European Journal 19

Version of Record online: 16 JAN 2013 | DOI: 10.1002/chem.201202710

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Crown gels: A heteroditopic [18]crown-6-based ligand in the presence of Zn2+ can form gels with and without Cs+. Interestingly, the remarkable gelation reinforcement of the ligand is shown with Cs+ in the presence of Zn2+, which is due to the formation of a sandwich complex. According to DFT calculations, one of the Zn2+ ions is bound to two diazafluorenylimino moieties by a tetrahedral structure. In addition, one of the Cs+ ions is bound to two crown-rings (see picture).

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