Bispicolyamine-Based Supramolecular Polymeric Gels Induced by Distinct Different Driving Forces with and Without Zn2+open access
- Park, Jaehyeon; Kim, Ka Young; Kang, Seok Gyu; Lee, Shim Sung; Lee, Ji Ha; Jung, Jong Hwa
- Issue Date
- bispicolylamine; complexes; gels; zinc; supramolecular gels
- INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, v.21, no.13
- Journal Title
- INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
- Metal-coordination polymeric gels are interesting areas as organic/inorganic hybrid supramolecular materials. The bispicolylamine (BPA) based gelator (1) showed excellent gelation with typical fibrillar morphology in acetonitrile. Upon complexing1with Zn2+, complexes ([1+ Zn + ACN](2+)and [1+ zinc trifluoromethanesulfonate (ZnOTf)](+)) with four coordination numbers were formed, which determine the gel structure significantly. A gel-sol transition was induced, driven by the ratio of the two metal complexes produced. Through nuclear magnetic resonance analysis, the driving forces in the gel formation (i.e., hydrogen-bonding and pi-pi stacking) were observed in detail. In the absence and the presence of Zn2+, the intermolecular hydrogen-bonds and pi-pi stacking were the primary driving forces in the gel formation, respectively. In addition, the supramolecular gels exhibited a monolayer lamellar structure irrespective of Zn2+. Conclusively, the gels' elasticity and viscosity reduced in the presence of Zn2+.
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- 자연과학대학 > 화학과 > Journal Articles
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