新型磷光红光激发铂(II)和钯(II)配合物的合成与性质，用于氧传感和三重态-三重态湮灭上转换的席夫碱。

Synthesis and properties of new phosphorescent red light-excitable platinum(II) and palladium(II) complexes with Schiff bases for oxygen sensing and triplet-triplet annihilation-based upconversion.

机构信息

Institute of Analytical Chemistry and Food Chemistry, Graz University of Technology, Stremayrgasse 9, 8010, Graz, Austria.

出版信息

Inorg Chem. 2013 Feb 4;52(3):1206-16. doi: 10.1021/ic301440k. Epub 2012 Dec 11.

DOI:10.1021/ic301440k

PMID:23231719

Abstract

New Pt(II) and Pd(II) complexes with donor-acceptor Schiff bases are conveniently prepared in only two steps. The complexes efficiently absorb in the red part of the spectrum (ε > 10(5) M(-1) cm(-1)) and show moderate to strong room-temperature phosphorescence in the near-infrared (NIR) region. Particularly, Pt(II) complexes possess phosphorescence quantum yields (Φ) of ~10%, but the emission of the respective Pd(II) complexes is less efficient (Φ ≈ 1%-2%). The complexes exhibit solvatochromic behavior, in which the absorption and emission spectra shift bathochromically in polar solvents. The Pt(II) complexes are embedded in polystyrene to produce oxygen-sensing materials. The Pd(II) and Pt(II) complexes are demonstrated to be efficient sensitizers in triplet-triplet annihilation-based upconversion systems.

摘要

新型 Pt(II) 和 Pd(II) 配合物通过供体-受体席夫碱的两步法合成。这些配合物在红光部分有高效吸收（ε > 10(5) M(-1) cm(-1)），在近红外（NIR）区域有中等至强的室温磷光。特别是 Pt(II) 配合物的磷光量子产率（Φ）约为 10%，而相应的 Pd(II) 配合物的发射效率较低（Φ≈1%-2%）。这些配合物表现出溶剂化变色行为，其中吸收和发射光谱在极性溶剂中发生红移。Pt(II) 配合物被嵌入聚苯乙烯中，以制备氧敏材料。Pd(II) 和 Pt(II) 配合物被证明是三重态-三重态湮灭上转换系统中的高效敏化剂。