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

被引:95
作者
Borisov, Sergey M. [1 ]
Saf, Robert [2 ]
Fischer, Roland [3 ]
Klimant, Ingo [1 ]
机构
[1] Graz Univ Technol, Inst Analyt Chem & Food Chem, A-8010 Graz, Austria
[2] Graz Univ Technol, Inst Chem & Technol Mat, A-8010 Graz, Austria
[3] Graz Univ Technol, Inst Inorgan Chem, A-8010 Graz, Austria
基金
欧洲研究理事会;
关键词
NEAR-IR PHOSPHORESCENCE; LOW-POWER; EXCITED-STATES; VISIBLE-LIGHT; EMITTING-DIODES; HIGH-EFFICIENCY; QUANTUM YIELDS; TEMPERATURE; POLYMER; SENSITIZERS;
D O I
10.1021/ic301440k
中图分类号
O61 [无机化学];
学科分类号
070301 [无机化学];
摘要
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 (epsilon > 10(5) M-1 cm(-1)) and show moderate to strong room-temperature phosphorescence in the near-infrared (NIR) region. Particularly, Pt(H) complexes possess phosphorescence quantum yields (Phi) of similar to 10%, but the emission of the respective Pd(II) complexes is less efficient (Phi approximate to 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.
引用
收藏
页码:1206 / 1216
页数:11
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