一种新型乙二氧基噻吩衍生的双（吡唑基）吡啶配体的铕配合物，具有高效的镧系元素敏化作用。

Europium complexes of a novel ethylenedioxythiophene-derivatized bis(pyrazolyl)pyridine ligand exhibiting efficient lanthanide sensitization.

机构信息

Department of Chemistry and Biochemistry and Center for Electrochemistry, The University of Texas at Austin, 1 University Station, A5300, Austin, Texas 78712-0165, USA.

出版信息

Inorg Chem. 2010 Mar 1;49(5):2035-7. doi: 10.1021/ic902481y.

DOI:10.1021/ic902481y

PMID:20112958

Abstract

A new class of highly luminescent nine-coordinated europium(III) tris(beta-diketonate) bis[(ethylenedioxythiophene)pyrazolyl]pyridine (L) complexes has been synthesized and the photophysical properties studied: 1 = Eu(hfac)(3)(L); 2 = Eu(tta)(3)(L); 3 = Eu(btfac)(3)(L). The solid-state structure of complex 1 has been determined by single-crystal X-ray crystallography and shows the geometry of the local coordination environment around the Eu(III) ion to be a slightly distorted tricapped trigonal prism. Luminescence lifetimes were found to be 581, 473, and 576 micros for complexes 1-3, respectively. Absolute quantum yields for complexes 1-3 were measured as 16.4 +/- 1.4%, 27.5 +/- 1.2%, and 22.2% +/- 0.3%, respectively.

摘要

一种新型的高发光九配位铕(III)三(β-二酮)双[(乙二氧基噻吩)吡唑基]吡啶(L)配合物已被合成，并研究了其光物理性质：1 = Eu(hfac)(3)(L)；2 = Eu(tta)(3)(L)；3 = Eu(btfac)(3)(L)。配合物 1 的单晶 X 射线结构已确定，显示出 Eu(III)离子局部配位环境的几何形状为略微扭曲的三角双锥。发现配合物 1-3 的荧光寿命分别为 581、473 和 576 微秒。配合物 1-3 的绝对量子产率分别测量为 16.4% +/- 1.4%、27.5% +/- 1.2%和 22.2% +/- 0.3%。