Copper(I) photosensitizer-silica nanoparticle assembly towards enhanced aqueous photoluminescence

Pati, Palas B.; Phelan, Brian T.; Melinato, Federica; Barandiarán, Estefanía Teruel; Lefèvre, François-Xavier; Rivoal, Marion; La, Carole; Queffélec, Clémence; Blart, Errol; Terrisse, Hélène; Humbert, Bernard; Chen, Lin X.; Forster, Robert J.; Pellegrin, Yann

doi:10.1016/j.jphotochem.2024.115574

Title: Copper(I) photosensitizer-silica nanoparticle assembly towards enhanced aqueous photoluminescence

Journal Article · 10 March 2024 · Journal of Photochemistry and Photobiology. A, Chemistry

DOI: https://doi.org/10.1016/j.jphotochem.2024.115574 · OSTI ID:2566082

Pati, Palas B. ^[1];

^[2]; Melinato, Federica ^[1]; Barandiarán, Estefanía Teruel ^[3]; Lefèvre, François-Xavier ^[1];

^[4];

^[4]; Queffélec, Clémence ^[1]; Blart, Errol ^[1];

^[1]; Humbert, Bernard ^[1]; Chen, Lin X. ^[5]; Forster, Robert J. ^[3];

^[1]

Nantes Univ. (France); Centre National de la Recherche Scientifique (CNRS) (France)
Argonne National Laboratory (ANL), Argonne, IL (United States)
Dublin City University (Ireland)
Nantes Univ. (France); Univ. of Angers (France); Le Mans Univ. (France); Centre National de la Recherche Scientifique (CNRS) (France)
Argonne National Laboratory (ANL), Argonne, IL (United States); Northwestern Univ., Evanston, IL (United States)

Harnessing the luminescence potential of Cu(I) complexes in aqueous media is typically hindered by their poor photostability and altered properties. Here, we report the synthesis, engineering and morphological characterization of a hydrophobic homoleptic copper(I) complex entrapped into silica nanoparticles, Cu-I@SiO₂ (where “Cu-I” designates [Cu(2,9-diiodo-1,10-phenanthroline)₂]⁺), as a promising stabilisation strategy towards water-compatible, Cu(I) complex-based luminescence. The polyether chain-decorated nano-objects are spherical with an average diameter of ca. 10.8 ± 1.9 nm. Upon dispersion in water, clear solution-like suspensions were obtained. Significantly, the aqueous suspensions photo-luminesce (Φ_em = 5×10^-4) upon excitation through the Metal-to-Ligand Charge-Transfer transition (MLCT) of the embedded copper(I) complexes. In contrast, the corresponding silica-free molecular complex dissolved in an aqueous environment revealed fully quenched emission. Finally, the use of Cu-I@SiO₂ suspensions as luminescent probes is reported, first by assessing their potential use as electrochemiluminescent probes, and second by monitoring the photoluminescence from Cu-I@SiO₂ in the presence of whole blood.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: Agence Nationale de la recherche (ANR); Science Foundation Ireland (SFI); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 2566082

Journal Information:: Journal of Photochemistry and Photobiology. A, Chemistry, Journal Name: Journal of Photochemistry and Photobiology. A, Chemistry Vol. 452; ISSN 1010-6030

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
copper(I) complexes
direct microemulsion
dye doped silica nanoparticles
electrochemiluminescence
photoluminescence

Title: Copper(I) photosensitizer-silica nanoparticle assembly towards enhanced aqueous photoluminescence

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References (49)

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