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Use of a bis-1,2,3-triazole gelator for the preparation of supramolecular metallogels and stabilization of gold nanoparticles

AuthorsTautz, Markus; Saldías, César; Lozano-Gorrín, Antonio Diego; Díaz Díaz, David
Issue Date14-Aug-2019
PublisherRoyal Society of Chemistry (UK)
CitationNew Journal of Chemistry 43: 13850-13856 (2019)
AbstractIn this work we have applied a double isosteric substitution of the amide groups presented in the gelator N,N′-((1S,2S)-cyclohexane-1,2-diyl)didodecanamide (C-Cyc) by 1,2,3-triazole rings affording the corresponding isosteric gelator (click-C-Cyc). This approach enabled the preparation of different metallogels and fine-tuning their properties. In particular, C-Cyc was found to form stable and reversible metallogels with Pd and Au in DMSO and DMF, whereas click-C-Cyc formed metallogels in these solvents only in the presence of Au. Comparing the gels made of C-Cycvs.click-C-Cyc in the presence of HAuCl·3HO, the former showed higher T values and 5-8 times slower gelation kinetics. Furthermore, the incorporation of EtN as reducing agent in the formulations facilitated the in situ formation of non-aggregated gold nanoparticles embedded in the viscoelastic networks made of either pure isosteres or with an equimolar mixture of click-C-Cyc and C-Cyc. So-formed NPs showed similar size distribution regardless the gold concentration and the nature of the gelator system.
Publisher version (URL)https://pubs.rsc.org/en/content/articlelanding/2019/nj/c9nj03427g
Identifiersdoi: 10.1039/c9nj03427g
e-issn: 1369-9261
issn: 1144-0546
Appears in Collections:(IPNA) Artículos
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