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Tunable Self-Assembled Nanostructures of Electroactive PEGylated Tetra(Aniline) Based ABA Triblock Structures in Aqueous Medium
Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan.
Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0003-3652-7798
2019 (English)In: Frontiers in Chemistry, E-ISSN 2296-2646, Vol. 7, p. 1-10, article id 518Article in journal (Refereed) Published
Abstract [en]

PEGylated tetra(aniline) ABA triblock structure PEG-TANI-PEG (2) consisting of tetra(aniline) (TANI) and polyethylene glycol (PEG) was synthesized by coupling the tosylated-PEG to boc-protected NH2/NH2 TANI (1) through a simple nucleophilic substitution reaction. Deprotection of 2 resulted in a leucoemeraldine base state of TANI (2-LEB), which was oxidized to stable emeraldine base (2-EB) state. 2-EB was doped with 1 M HCl to emeraldine salt (2-ES) state. FTIR, 1H and 13C NMR and UV-Vis-NIR spectroscopy, and MS (ESI) was used for structural characterization. The synthesized triblock structure exhibited good electroactivity as confirmed by CV and UV-Vis-NIR spectroscopy. Self-assembling of the triblock structure in aqueous medium was assessed by DLS, TEM, and SEM. Spherical aggregates were observed with variable sizes depicting the effect of concentration and oxidation of 2-LEB. Further, the aggregates showed acid/base sensitivity as evaluated by doping and dedoping of 2-EB with 1 M HCl and 1 M NH4OH, respectively. Future applications in drug delivery and sensors are envisaged for such tunable self-assembled nanostructures in aqueous media.

Place, publisher, year, edition, pages
Frontiers Media S.A., 2019. Vol. 7, p. 1-10, article id 518
Keywords [en]
triblock nanostructures, PEGylation, redox activity, aqueous self-assembly, tunable self-assembled structures
National Category
Polymer Chemistry Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
URN: urn:nbn:se:ltu:diva-75367DOI: 10.3389/fchem.2019.00518ISI: 000477062400001PubMedID: 31403042Scopus ID: 2-s2.0-85072212160OAI: oai:DiVA.org:ltu-75367DiVA, id: diva2:1339289
Note

Validerad;2019;Nivå 2;2019-08-06 (johcin)

Available from: 2019-07-29 Created: 2019-07-29 Last updated: 2019-09-23Bibliographically approved

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