Luminescent Gold(I)-Thiophenolate Coordination Polymers as Phase Change Materials and Precursors for the Formation of Multifunctional Nanocomposites - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2017

Luminescent Gold(I)-Thiophenolate Coordination Polymers as Phase Change Materials and Precursors for the Formation of Multifunctional Nanocomposites

A. Demessence
  • Fonction : Orateur
O. Veselska
  • Fonction : Auteur
  • PersonId : 1005446
N. Guillou
  • Fonction : Auteur
M. Monge
  • Fonction : Auteur
G. Ledoux,
A. Fateeva,
P. Bordet,

Résumé

Hybrid Au(I) compounds exhibit a large domain of applications such as electronic devices, contrast agents, sensors or photocatalysts. These applications are related to the ability of gold(I) to form aurophilic interactions implying self-assembly and luminescence.1 Among them, gold(I) thiolates are an important class of materials due to the high affinity of gold for sulfur atoms that can generate oligomers or polymers. However due to the fast precipitation and the insolubility of these solids, a little is known about their structure and the origin of the photoluminescence. We present the syntheses and the first structure resolutions, by powder X-Ray diffraction, of series of gold(I)-thiophenolate-based compounds. Depending on the substituent different structures are obtained: lamellar, helicoidal or cyclic (Fig. 1a). The photophysical properties of these hybrid materials are studied in solid-state and coupled with DFT calculations. These analyses show that the charge transfer from Ligand-to-Metal or Metal-to-Ligand and the quantum yield from few percentage to 70 %, can be tuned with the electrophilicity of the thiolates.2-3 Among those coordination polymers, two exhibit dynamic OFF/ON emission switching, one associated with a thermally induced solid-state phase change from amorphous to crystalline2 and the other one from a reversible esterification/saponification. Finally we synthesized luminescent, crystalline and flexible fibers of [Au(SPh)]n and generated by calcination composite materials mixing gold nanoparticles (GNP) and fibers (Fig. 1b and c). This study shows the great potential of gold thiolates as phosphorescent hybrid materials and as precursors for the formation of multifunctional nanocomposites coupling plasmonic and luminescence in electronic devices or photocatalysis.
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Dates et versions

hal-01559050 , version 1 (10-07-2017)

Identifiants

  • HAL Id : hal-01559050 , version 1

Citer

A. Demessence, O. Veselska, N. Guillou, M. Monge, G. Ledoux,, et al.. Luminescent Gold(I)-Thiophenolate Coordination Polymers as Phase Change Materials and Precursors for the Formation of Multifunctional Nanocomposites. 13th International Conference on Materials Chemistry, MC13, Jul 2017, Liverpool, United Kingdom. ⟨hal-01559050⟩
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