Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Avenida Fuentenueva s/n, 18071 Granada, Spain.
Université Bordeaux/CNRS, ISM, 351 cours de la Libération, 33405 Talence Cedex, France.
Analyst. 2016 May 10;141(10):3090-7. doi: 10.1039/c6an00497k.
A doubly pyrene-grafted bis-cyclometallated iridium complex with engineered electronically excited states demonstrates reversible electronic energy transfer between adjacent chromophores giving rise to extremely long-lived red luminescence in solution (τ = 480 μs). Time-resolved spectroscopic studies afforded determination of pertinent photophysical parameters including rates of energy transfer and energy distribution between constituent chromophores in the equilibrated excited molecule (ca. 98% on the organic chromophores). Incorporation into a nanostructured metal-oxide matrix (AP200/19) gave highly sensitive O2 sensing films, as the detection sensitivity was 200-300% higher than with the commonly used PtTFPP and approaches the sensitivity of the best O2-sensing dyes reported to date.
具有双芘基取代的双环金属铱配合物，具有工程化的电子激发态，可在相邻发色团之间实现可逆的电子能量转移，从而在溶液中产生极长寿命的红色发光（τ=480μs）。时间分辨光谱研究提供了相关光物理参数的测定，包括平衡激发分子中组成发色团之间的能量转移速率和能量分布（约有机发色团的 98%）。将其掺入纳米结构的金属氧化物基质（AP200/19）中，得到了高灵敏度的 O2 传感膜，因为检测灵敏度比常用的 PtTFPP 高 200-300%，接近迄今为止报道的最佳 O2 传感染料的灵敏度。
