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Updated: Oct 1, 2026

Using Polystyrene-block-poly(acrylic acid)-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization
Published on: July 9, 2015
Generating, visualizing and tuning π-π interactions in metal-induced supramolecular assembly
Giau Le-Hoang1, Laure Guénée2, Claude Piguet1
1Department of Inorganic and Analytical Chemistry, University of Geneva 30 Quai E. Ansermet CH-1211 Geneva 4 Switzerland Hoang.Le@unige.ch Claude.Piguet@unige.ch.
Abstract:
This work emphasizes the role of metal complexation for controlling and tuning static/dynamic π-stacked organizations responsible for the programmed light emission of the bichromophoric pyrene-terimine ligand L2 upon photoexcitation. Its binding to the closed-shell trivalent yttrium guest [Y(hfac)3] (hfac = 1,1,1,5,5,5-hexafluoro-pentane-2,4-dione) provides a diamagnetic heteroleptic [L2Y(hfac)3] adduct for which the static intramolecular pyrene-pyrene excimer emission operating in the free ligand L2 is transformed into a dynamic intramolecular pyrene-pyrene excimer emission in the resulting complex. The transition from static-to-dynamic intramolecular excimers results in an enhanced sensitivity toward interactions with electron-poor nitrobenzene guests, which is supported by a considerable Stern-Volmer quenching constant measured for [L2Y(hfac)3]. This demonstrates that the metal-directed organization of the polyaromatic ligand in [L2Y(hfac)3] can boost the excimeric chemical sensing of target aromatic analytes.
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