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  • 09월 05일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제120회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Probing kinetic stability of supramolecular polymers in terms of their composition

2017년 8월 23일 22시 39분 39초
POLY.P-21 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 20일 (금요일) 13:00~14:30
Polymer Chemistry
저자 및
Sung Ho Jung, Kazunori Sugiyasu*, Masayuki Takeuchi*
Supramolecular Design & Function Group, National Institute for Materials Science, Japan
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승인 3건

Kinetic insight into supramolecular polymerization allows for the control over self-assembled nanostructures. For example, we have recently achieved living supramolecular polymerization, which enabled us to synthesize supramolecular polymers with controlled length and narrow polydispersity.[1,2] This method is expected to lead to the synthesis of supramolecular block copolymers, yet doing so remains a great challenge. Herein, supramolecular copolymerization of two different porphyrin derivatives complexed with either zinc or copper (1TZn or 1TCu, respectively) as metal core was investigated. These two different porpyrins can coassemble because of their structural similarity. Through the seeded-growth approach, which we have previously established[1,2], we succeeded in the extension of the block of 1TCu stack from the 1TZn seed, thereby creating the supramolecular block copolymer (1TCu-1TZn-1TCu) Interestingly, the end-capped supramolecular block copolymer (1TCu-1TZn-1TCu) showed the enhanced kinetic stability in comparison with non-protected supramolecular polymer at terminal part (1TZn-1TZn-1TZn) against axial ligand (DMAP). We believe that this approach will expand the understanding on kinetic insight and potential application of supramolecular polymerization. [1] S. Ogi, K. Sugiyasu, S. Manna, S. Samitsu, M. Takeuchi, Nat. Chem., 2014, 6, 188-195. [2] T. Fukui, S. Kawai, S. Fujinuma, Y. Matsushita, T. Yasuda, T. Sakurai, S. Seki, M. Takeuchi, K. Sugiyasu, Nat. Chem., 2017, 9, 493-499.