Supramolecular polymerization based on the metalation of porphyrin nanosheets in aqueous media
- Kim, Sukyoung; Kim, Ka Young; Jung, Jong Hwa; Jung, Sung Ho
- Issue Date
- ROYAL SOC CHEMISTRY
- INORGANIC CHEMISTRY FRONTIERS, v.9, no.8, pp.1630 - 1635
- Journal Title
- INORGANIC CHEMISTRY FRONTIERS
- Start Page
- End Page
- Despite its great potential in supramolecular chemistry to achieve structural complexity and sophisticated functionality, the kinetic control over molecular self-assembly in coordination with supramolecular polymerization still constitutes a challenge. Herein, the kinetically controlled supramolecular polymerization of porphyrin derivatives was achieved in aqueous media by a seeding method based on a metastable state generated by synergistic metalation and Lewis acid-base complexation. As a monomer, free-base porphyrin 1(free) bearing four amide-linked ethylene glycol side chains was synthesized. In aqueous media, monomeric 1(free) self-assembles into H-type aggregates, which then transformed into J-type aggregates in the presence of Zn(s) ions via metalation of 1(free), affording Zn-porphyrin complex 1(Zn). The distinct porphyrin cores of 1(free) and 1(Zn) undergo different aggregation pathways. In the presence of ZnOi) ions, the H-type aggregation formed by lees is in the metastable state, and the synthesis of monomeric 1(Zn) via metalation retards the spontaneous J-aggregation. The seeding method was successfully applied to produce two-dimensional nanosheets in the presence of Zn(s) ions. This kinetically controlled metalation provides a platform for the development of supramolecular metal-based structures with controlled size, morphology, and chemical properties.
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- 자연과학대학 > 화학과 > Journal Articles
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