期刊
JOURNAL OF PHYSICAL CHEMISTRY B
卷 109, 期 13, 页码 6174-6182出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp044591h
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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 lantharride 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 Nd3+ ion in a Nd-D-P gel are discussed using Judd-Ofelt analysis, which indicates that the F-4(3/2) -> I-4(11/2) transition of the Nd3+ ion in the Nd-D-P gel can be considered as a possible laser transition.
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