Ligand-sensitized fluorescence of Eu3+ using naphthalene carboxylic acids as ligands

Light-Emitting Polymer Nanocomposites

“…The light-harvesting ligand capped nanocrystal complex is considered to be the complete nanoparticle. Aromatic acids have been used as ligands to sensitize and enhance lanthanide fluorescence by reducing the probability of radiationless (heat) energy transfer from the RE ion to the solvent [12]. Both acetylsalicylic acid (ASA) and 2-picolinic acid (PA) are aromatic acids and bidentate ligands.…”

Luminescent properties of encapsulation of europium complex into meso-structured silica monoliths

“…The dominating band at about 350 nm can be ascribed to electric transition of 1,10-phenanthroline ligands as research work showed its absorption in the similar range [7]. The other relatively weaker band appearing at the high-energy side of excitation spectrum (about 290 nm) is assigned to benzoic acid ligands, since the absorption band of aromatic carboxylic groups appear in the range 270-300 nm [8]. According to the Dexter's theory [9], the suitability of Ln 3+ of the energy difference DE ¼ E L ÀE Ln between the first excited energy level of the Ln 3+ ion E Ln and the triplet state energy level of the ligand E L is a critical factor for efficient energy transfer.…”

The Influence of Synthesis Parameters on Particle Size and Photoluminescence Characteristics of Ligand Capped Tb3+:LaF3

“…More specifically, the function of a surface organic ligand (acetylsalicylic acid; ASA) is used to absorb and transfer UV light to RE ions that are doped into inorganic nanocrystals dispersed into PMMA. ASA is an aromatic carboxylic acid and aromatic acids have been used as ligands to coordinate, to sensitize and to enhance lanthanide fluorescence of RE ions [9][10][11]. The inorganic nanocrystal (lanthanum trifluoride; LaF 3 ) provides a low phonon energy environment (350 cm −1 ) and offers channels for charge transfer excitations from near anionic ligands [12,13].…”