In:
International Journal of Molecular Sciences, MDPI AG, Vol. 21, No. 13 ( 2020-06-29), p. 4617-
Abstract:
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 complexing 1 with 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 π–π stacking) were observed in detail. In the absence and the presence of Zn2+, the intermolecular hydrogen-bonds and π–π 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+.
Type of Medium:
Online Resource
ISSN:
1422-0067
DOI:
10.3390/ijms21134617
Language:
English
Publisher:
MDPI AG
Publication Date:
2020
detail.hit.zdb_id:
2019364-6
SSG:
12
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