Infinite coordination polymer networks: metallogelation of aminopyridine conjugates and in situ silver nanoparticle formation

Rajendhraprasad Tatikonda, Evgeny Bulatov, Zulal Özdemir, Nonappa Nonappa, Matti Haukka

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

1 Sitaatiot (Scopus)
22 Lataukset (Pure)

Abstrakti

Herein we report silver(I) directed infinite coordination polymer network (ICPN) induced self-assembly of low molecular weight organic ligands leading to metallogelation. Structurally simple ligands are derived from 3-aminopyridine and 4-aminopyridine conjugates which are composed of either pyridine or 2,2′-bipyridine cores. The cation specific gelation was found to be independent of the counter anion, leading to highly entangled fibrillar networks facilitating the immobilization of solvent molecules. Rheological studies revealed that the elastic storage modulus (G′) of a given gelator molecule is counter anion dependent. The metallogels derived from ligands containing a bipyridine core displayed higher G′ values than those with a pyridine core. Furthermore, using single crystal X-ray diffraction studies and 1H–15N two-dimensional (2D) correlation NMR spectroscopy, we show that the tetracoordination of silver ions enables simultaneous coordination polymerization and metallosupramolecular cross-linking. The resulting metallogels show spontaneous, in situ nanoparticle (d < 2–3 nm) formation without any additional reducing agents. The silver nanoparticle formation was followed using spectroscopic studies, and the self-assembled fibrillar networks were imaged using transmission electron microscopy (TEM) imaging.
AlkuperäiskieliEnglanti
Sivut442-451
Sivumäärä10
JulkaisuSoft Matter
Vuosikerta15
Numero3
DOI - pysyväislinkit
TilaJulkaistu - 1 tammikuuta 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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  • Projektit

    • 1 Päättynyt

    HYBER: Suomen Akatemian Biosynteettisten hybridimateriaalien molekyylimuokkauksen huippuyksikkö (2014-2019)

    Cherian, T., Nonappa, N., Ikkala, O., Bertula, K., Poutanen, M., Morits, M., Hynninen, V., Myllymäki, T., Toivonen, M., Sohrabi, F., Haataja, J., Sanchez Sanchez, A. & Rissanen, S.

    01/01/201730/06/2020

    Projekti: Academy of Finland: Other research funding

    Laitteet

    OtaNano

    Anna Rissanen (Manager)

    Aalto-yliopisto

    Laitteistot/tilat: Facility

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