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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Evaluation of quinoline as a remote sensitiser for red and near-infrared emissive lanthanide(iii) ions in solution and the solid state
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Evaluation of quinoline as a remote sensitiser for red and near-infrared emissive lanthanide(iii) ions in solution and the solid state

机译：评价喹啉作为溶液和固态中红色和近红外发射镧系元素（iii）离子的远程敏化剂

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摘要

In order to evaluate quinoline as a remote sensitiser, we have prepared a DTPA based ligand, H_3L, bearing quinoline bisamide arms for the complexation of a range of lanthanide(iii) ions to give the neutral complexes LnL where Ln~(3+) = Y~(3+), Eu~(3+), Sm~(3+), Tb~(3+), Er~(3+), Yb~(3+), Nd~(3+), Gd~(3+). Detection of the phosphorescence signal exhibited by the GdL complex at 77 K confirmed that the triplet energy level of the sensitiser at 21190 cm~(-1) was suitable for the indirect population of a range of lanthanide luminescent states. A full photophysical analysis of the complexes reveals that SmL and EuL display red emission when excited through the ligand-based absorption band centred at 330 nm, extending the excitation to violet light around 370 nm. We demonstrate that quinoline sensitizes near-infrared emission in the YbL, ErL and NdL complexes, in powder form as well as in solution. Most importantly, the luminescence for YbL and NdL was sufficiently efficient to be detected in non-deuterated solvent.
机译：为了评价喹啉作为远程敏化剂，我们制备了一种基于DTPA的配体H_3L，带有喹啉双酰胺臂，用于使一系列镧系元素（iii）离子络合，得到中性络合物LnL，其中Ln〜（3+）= Y〜（3 +），Eu〜（3 +），Sm〜（3 +），Tb〜（3 +），Er〜（3 +），Yb〜（3 +），Nd〜（3 +），Gd 〜（3+）。对GdL配合物在77 K处显示的磷光信号的检测证实，敏化剂在21190 cm〜（-1）处的三重态能级适用于一系列镧系元素发光态的间接填充。对该配合物的完整光物理分析表明，当通过以330 nm为中心的基于配体的吸收带激发时，SmL和EuL显示红色发射，从而将激发扩展到370 nm附近的紫光。我们证明喹啉在粉末形式以及溶液形式的YbL，ErL和NdL复合物中能敏化近红外发射。最重要的是，YbL和NdL的发光足够有效，可以在非氘代溶剂中检测到。

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