Ultrabright Lanthanide Nanoparticles

Joan Goetz, Aline Nonat, Abdoulaye Diallo, Mohamadou Sy, Ildan Sera, Alexandre Lecointre, Christophe Lefevre, Chi Fai Chan, Ka-Leung WONG*, Loïc J. Charbonnière

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Tb-doped La0.9Tb0.1F3 nanoparticles were prepared by a simple and reproducible microwave-assisted synthetic protocol in water. The nanoparticles were characterized by XRD, TEM, dynamic light scattering and inductively coupled plasma atomic emission spectroscopy elemental analysis. Eleven ligands with varying coordination and photosensitizing abilities were designed to bind at the surface of the Tb-doped nanoparticles. The photosensitizing behavior was monitored by electronic absorption spectroscopy and steady-state and time-resolved emission spectroscopy. The two most effective photosensitizing ligands were used to isolate and purify the capped nanoparticles. The composition and spectroscopic properties of these nanoparticles were measured, which revealed either 2660 and 5240 ligands per nanoparticle, molar absorptivities of 7.6×106 and 1.6×107 m−1 cm−1 and luminescence quantum yields of 0.29 and 0.13 in water, respectively. These data correspond to exceptional brightness values of 2.2×106 and 2.1×106 m−1 cm−1, respectively. The as-prepared nanoparticles were imaged in HeLa cells by fluorescence microscopy, which showed their specific localization in lysosomes.

Original languageEnglish
Pages (from-to)526-534
Number of pages9
JournalChemPlusChem
Volume81
Issue number6
DOIs
Publication statusPublished - 1 Jun 2016

Scopus Subject Areas

  • Chemistry(all)

User-Defined Keywords

  • antenna effects
  • lanthanides
  • luminescence
  • microscopy
  • nanoparticles

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