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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >Characterization and photophysical properties of lanthanide macrocyclic complexes derived from (2,1)
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Characterization and photophysical properties of lanthanide macrocyclic complexes derived from (2,1)

机译:衍生自(2,1)的镧系元素大环配合物的表征和光物理性质

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摘要

The isolation and characterization of Ln(NO_3)_3 complexes (Ln = La, Pr, Nd, Eu, Tb, Lu) with 2,3-benzo-1,4,7,13-tetraoxa-10-azacyclopenta-decane (L~1) and two of its N-substituted derivatives (L~2, L~3) are reported, Structural information in the solid state is derived from spectroscopic data (vibrational, absorption, reflectance and luminescence spectra). Both ligand- and metal-centered luminescence of solutions of the complexes in oxygen-free and anhydrous acetonitrile are investigated. Substitution of the N-proton of the crown ether enhances metal emission. Ligand L~2 displays a good antenna effect for Eu~(III)d luminescence, while L~3 is especially effective in transferring energy from its triplet state onto the excited states of Tb~(III). The Eu~(III) site in Eu(NO_3)_3L~2 centre dot 0.5C_2H_5OH centre dot 1.5H_2O possesses a low local symmetry and a relatively long ~5D_o lifetime (1.01 ms).
机译:Ln(NO_3)_3配合物(Ln = La,Pr,Nd,Eu,Tb,Lu)与2,3-苯并-1,4,7,13-四氧杂-10-氮杂环戊烷-癸烷(L的分离和表征)报告了〜1)及其两个N-取代的衍生物(L〜2,L〜3),固态的结构信息来自光谱数据(振动,吸收,反射率和发光光谱)。研究了在无氧和无水乙腈中复合物溶液的配体和金属中心发光。冠醚的N质子取代可增强金属排放。配体L〜2对Eu〜(III)d发光显示出良好的天线效应,而L〜3在将能量从三重态转移到Tb〜(III)的激发态方面特别有效。 Eu(NO_3)_3L〜2中心点0.5C_2H_5OH中心点1.5H_2O中的Eu〜(III)位置具有较低的局部对称性和相对较长的〜5D_o寿命(1.01 ms)。

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