Near-Infrared Luminescent Hybrid Materials Doped with Lanthanide (Ln) Complexes (Ln = Nd, Yb) and Their Possible Laser Application

Abstract

The crystal structures of ternary Ln(DBM)(3)phen complexes (DBM = dibenzoylmethane, phen = 1,10-phenanthroline, and Ln = Nd, Yb) and their in situ syntheses via the sol-gel process are reported. The properties of the Ln(DBM)(3)phen complexes and their corresponding Ln(3+)/DBM/phen-co-doped luminescent hybrid gels obtained via an in situ method (Ln-D-P gel) have been studied. The results reveal that the lanthanide complexes are successfully in situ synthesized in the corresponding Ln-D-P gels. Both Ln(DBM)(3)phen complexes and Ln-D-P gels display sensitized near-infrared (NIR) luminescence upon excitation at the maximum absorption of the ligands, which contributes to the efficient energy transfer from the ligands to the Ln(3+) ions (Ln = Nd, Yb), an antenna effect. The radiative properties of the Nd(3+) ion in a Nd-D-P gel are discussed using Judd-Ofelt analysis, which indicates that the (4)F(3/2) --> (4)I(11/2) transition of the Nd(3+) ion in the Nd-D-P gel can be considered as a possible laser transition.

Visible‐Light Excitation of Infrared Lanthanide Luminescence via Intra‐Ligand Charge‐Transfer State in 1,3‐Diketonates Containing Push‐Pull Chromophores

“…Comparison of the structure of [NdL 3 phen] with that reported for a model complex [Nd(dbm) 3 phen] (dbm = dibenzoylmethane, Scheme 2) [25] reveals somewhat slightly longer bonds in the case of [Nd(dbm) 3 At last, it may be noted that intermolecular interaction observed in the crystal structures of ligand HL and its Nd III complex may explain the low solubility of these compounds in common organic solvents.…”

Syntheses, crystal structures and near-infrared luminescent properties of holmium (Ho) and praseodymium (Pr) ternary complexes

“…The introduction of the synergic ligands to the complexes can effectively saturate the coordination sphere of lanthanide ions and shield the lanthanide ions from the water molecules that may quench the luminescence. The synergic ligands can also absorb excitation energy that can be transferred to the excited states of lanthanide ions.With respect to NIR luminescent lanthanide complexes, most researches are limited to the Er 3+ , Nd 3+ , and Yb 3+ ions [11,12]. Yet, the development and exploitation of the NIR luminescent Ho and Pr complexes [13,14] lag a way behind those of the lanthanide ions mentioned above.…”

“…With respect to NIR luminescent lanthanide complexes, most researches are limited to the Er 3+ , Nd 3+ , and Yb 3+ ions [11,12]. Yet, the development and exploitation of the NIR luminescent Ho and Pr complexes [13,14] lag a way behind those of the lanthanide ions mentioned above.…”

Synthesis, crystal structure, and optical properties of a novel rare-earth complex Nd(C2F5COO)3 · Phen

“…In this case, the r of the 4 F 3/2 ? 4 I 11/2 fluorescence transition of the Nd(III) ions is 1.92 9 10 -20 cm 2 , which is higher than some previous works which are listed in Table 3 [29,30]. This complex will be a promising material for liquid laser application.…”