Ambient-temperature near-IR phosphorescence and potential applications of rhenium-oxo corroles
Ambient-temperature near-IR phosphorescence and potential applications of rhenium-oxo corroles
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DOI：
10.1039/c8pp00473k
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发表时间：
2019-05-01
影响因子：
3.1
通讯作者：
Ghosh, Abhik
中科院分区：
文献类型：
--
作者：
Borisov, Sergey M.;Einrem, Rune F.;Ghosh, Abhik
本文首次报道了一系列双（V）-氧代三（对-X-苯基）吡咯类化合物Re[TpXPC]（O）（其中X = CF_3、F、H、CH_3和OCH_3）的化学物理研究。配合物在室温下在缺氧甲苯中均表现出近红外磷光，最大发射波长为780 +/- 10 nm，磷光衰减时间为56-74 μ s，量子产率为1.07- 1.52%，这是迄今为止报道的最高的磷光吡咯衍生物。我们还表明，染料可以作为指示剂在光学氧传感器和敏化剂在三重态-三重态-湮灭为基础的上转换。虽然ReO corroles不是上级基准苯并卟啉络合物，目前在这些应用中使用，他们可能会证明在某些领域，如光学多分析物传感由于染料的可用光谱特性的灵活性提高有用。配合物的高热和光化学稳定性也预示着它们作为新的磷光敏化剂在光动力治疗中的部署。
Presented herein is a first photophysical investigation of a series of rhenium(V)-oxo tris(p-X-phenyl) corroles, Re[TpXPC](O), where X = CF3, F, H, CH3, and OCH3. The complexes all exhibit near-IR phosphorescence in anoxic toluene at room temperature, with emission maxima at 780 +/- 10 nm, phosphorescence decay times of 56-74 mu s and quantum yields of 1.07-1.52%, the highest reported to date for phosphorescent corrole derivatives. We have also demonstrated that the dyes may serve as indicators in optical oxygen sensors and as sensitizers in triplet-triplet-annihilation-based upconversion. Although the ReO corroles are not superior to benchmark benzoporphyrin complexes that are currently used in these applications, they may prove useful in certain areas such as optical multianalyte sensing owing to improved flexibility in the available spectral properties of the dyes. The high thermal and photochemical stability of the complexes also bodes well for their deployment as new, phosphorescent sensitizers in photodynamic therapy.