Gold Nanoparticles with N-Heterocyclic Carbene/Triphenylamine Surface Ligands: Stable and Electrochromically Active Hybrid Materials for Optoelectronics.

Autor: Sun N; Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069, Dresden, Germany., Singh S; Chair for Emerging Electronic Technologies, Technical University of Dresden, Nöthnitzer Str. 61, 01187, Dresden, Germany.; Leibniz Institute for Solid State and Materials Research Dresden, Helmholtzstraße 20, 01069, Dresden, Germany., Zhang H; Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069, Dresden, Germany., Hermes I; Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069, Dresden, Germany., Zhou Z; Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069, Dresden, Germany., Schlicke H; Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069, Dresden, Germany., Vaynzof Y; Chair for Emerging Electronic Technologies, Technical University of Dresden, Nöthnitzer Str. 61, 01187, Dresden, Germany.; Leibniz Institute for Solid State and Materials Research Dresden, Helmholtzstraße 20, 01069, Dresden, Germany., Lissel F; Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069, Dresden, Germany.; Hamburg University of Technology, Kasernenstraße 12, 21073, Hamburg, Germany., Fery A; Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069, Dresden, Germany.; Chair for Physical Chemistry of Polymeric Materials, Technische Universität Dresden, Bergstraße 66, 01069, Dresden, Germany.
Jazyk: angličtina
Zdroj: Advanced science (Weinheim, Baden-Wurttemberg, Germany) [Adv Sci (Weinh)] 2024 Aug; Vol. 11 (29), pp. e2400752. Date of Electronic Publication: 2024 May 22.
DOI: 10.1002/advs.202400752
Abstrakt: Organic-hybrid particle-based materials are increasingly important in (opto)electronics, sensing, and catalysis due to their printability and stretchability as well as their potential for unique synergistic functional effects. However, these functional properties are often limited due to poor electronic coupling between the organic shell and the nanoparticle. N-heterocyclic carbenes (NHCs) belong to the most promising anchors to achieve electronic delocalization across the interface, as they form robust and highly conductive bonds with metals and offer a plethora of functionalization possibilities. Despite the outstanding potential of the conductive NHC-metal bond, synthetic challenges have so far limited its application to the improvement of colloidal stabilities, disregarding the potential of the conductive anchor. Here, NHC anchors are used to modify redox-active gold nanoparticles (AuNPs) with conjugated triphenylamines (TPA). The resulting AuNPs exhibit excellent thermal and redox stability benefiting from the robust NHC-gold bond. As electrochromic materials, the hybrid materials show pronounced color changes from red to dark green, a highly stable cycling stability (1000 cycles), and a fast response speed (5.6 s/2.1 s). Furthermore, TPA-NHC@AuNP exhibits an ionization potential of 5.3 eV and a distinct out-of-plane conductivity, making them a promising candidate for application as hole transport layers in optoelectronic devices.
(© 2024 The Authors. Advanced Science published by Wiley‐VCH GmbH.)
Databáze: MEDLINE
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