Synthesis and Photophysical Properties of Eu(III) Complexes with Phosphine Oxide Ligands including Metal Ions
Synthesis and Photophysical Properties of Eu(III) Complexes with Phosphine Oxide Ligands including Metal Ions
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DOI：
10.1246/bcsj.20170241
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发表时间：
2018-01
影响因子：
4
通讯作者：
Masanori Yamamoto;T. Nakanishi;Y. Kitagawa;T. Seki;Hajime Ito;K. Fushimi;Y. Hasegawa
中科院分区：
文献类型：
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作者：
Masanori Yamamoto;T. Nakanishi;Y. Kitagawa;T. Seki;Hajime Ito;K. Fushimi;Y. Hasegawa
报道了由发光Eu~(3+)络合物和金属块(Al~(3+)、Zn~(2+)、Pd~(2+)络合物)组成的稀土(Ln~(3+))配合物。通过[Eu(HFA)3(Dppy)2PdCl2]n(Eu-Pd)、[Eu(HFA)3(Dppy)2ZnCl2]n(Eu-Zn)和[Eu(HFA)3(Dppy)4AlCl3]n(Eu-Al)(HFA：六氟乙酰丙酮酸，dppy：4-吡啶基二苯基氧膦)与[MCln(Dppy)m](M=Pd2+，Zn2+和Al3+)的络合反应合成了Eu3+的配合物[Eu(HFA)3(Dppy)2PdCl2]n(Eu-Pd)，[Eu(HFA)3(Dppy)2ZnCl2]n(Eu-Zn)和[Eu(HFA)3(Dppy)4AlCl3]n(Eu-Al)。用单晶X射线结构分析和密度泛函理论计算对这些预测结构进行了估算。根据发射寿命和发射量子产率对这些配合物的光物理性质进行了评价。发射量子产额与连接金属块的含量有关。Eu-Al络合物具有最大的发射量子产率(Φff=72%)。相比之下，Eu-Pd的发射量子产率为1.3%。研究了Eu~(3+)与金属链节相连的配合物的结构和光物理性质。
Lanthanide (Ln3+) complexes composed of luminescent Eu3+ complex and joint metal blocks (Al3+, Zn2+ and Pd2+ complexes) are reported. The Eu3+ complexes [Eu(hfa)3(dppy)2PdCl2]n (Eu-Pd), [Eu(hfa)3(dppy)2ZnCl2]n (Eu-Zn) and [Eu(hfa)3(dppy)4AlCl3]n (Eu-Al) (hfa: hexafluoroacetylacetonato, dppy: 4-pyridyldiphenylphosphine oxide) were synthesized by the complexation of [Eu(hfa)3(H2O)2] with [MCln(dppy)m] (M = Pd2+, Zn2+ and Al3+). These predicted structures were estimated using single-crystal X-ray structural analyses and DFT calculations. Photophysical properties of these complexes were evaluated based on the emission lifetimes and emission quantum yields. The emission quantum yields are dependent on the moiety of the joint metal blocks. Eu-Al complex shows the largest emission quantum yield (Φff = 72%). In contrast, the emission quantum yield of Eu-Pd is found to be 1.3%. The structures and photophysical properties of Eu3+ complexes linked with joint metal blocks are demonstrated.