Sun Li-Ning, Zhang Hong-Jie, Meng Qing-Guo, Liu Feng-Yi, Fu Lian-She, Peng Chun-Yun, Yu Jiang-Bo, Zheng Guo-Li, Wang Shu-Bin
Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of China.
J Phys Chem B. 2005 Apr 7;109(13):6174-82. doi: 10.1021/jp044591h.
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.
报道了三元Ln(DBM)₃phen配合物（DBM = 二苯甲酰甲烷，phen = 1,10 - 菲咯啉，Ln = Nd、Yb）的晶体结构及其通过溶胶 - 凝胶法的原位合成。研究了Ln(DBM)₃phen配合物及其通过原位方法（Ln - D - P凝胶）获得的相应Ln³⁺/DBM/phen共掺杂发光杂化凝胶的性质。结果表明，镧系配合物在相应的Ln - D - P凝胶中成功原位合成。Ln(DBM)₃phen配合物和Ln - D - P凝胶在配体的最大吸收波长处激发时均显示出敏化近红外（NIR）发光，这有助于从配体到Ln³⁺离子（Ln = Nd、Yb）的有效能量转移，即天线效应。使用Judd - Ofelt分析讨论了Nd - D - P凝胶中Nd³⁺离子的辐射性质，这表明Nd - D - P凝胶中Nd³⁺离子的⁴F₃/₂→⁴I₁₁/₂跃迁可被视为一种可能的激光跃迁。
