Luminescence temperature sensing using poly(vinyl alcohol)-encapsulated Ru(bpy)3 2+ films.
Luminescence temperature sensing using poly(vinyl alcohol)-encapsulated Ru(bpy)3 2+ films.
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DOI：
10.1039/b516366h
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发表时间：
2006-03
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影响因子：
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通讯作者：
A. Mills;C. Tommons;R. Bailey;M. C. Tedford;P. Crilly
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文献类型：
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作者：
A. Mills;C. Tommons;R. Bailey;M. C. Tedford;P. Crilly
钌(II)二亚胺络合物，例如钌(II)三(联吡啶)、Ru(bpy)3 2+，具有高度发光的激发态，不仅容易被氧气猝灭，而且还容易被温度升高猝灭。通过将复合物封装在不透氧的聚合物中，可以使前一种效果变得微不足道，尽管封装通常也会导致温度敏感性的损失。研究了封装在 PVA 中的 Ru(bpy)3 2+ 的发光特性作为氧浓度和温度的函数，发现与前者无关，但对后者仍然非常敏感。结果符合已建立的阿伦尼乌斯型方程，该方程基于通过非辐射过程通过略高的（DeltaE = 3100 cm(-1)）3d-d 态对发射态进行热猝灭，该态快速失活（10（-13）s）。
The ruthenium(II) diimine complexes, such as ruthenium(II) tris(bipyridyl), Ru(bpy)3 2+, possess highly luminescent excited states that are not only readily quenched by oxygen but also by an increase in temperature. The former effect can be rendered insignificant by encapsulating the complex in an oxygen impermeable polymer, although encapsulation often leads also to a loss of temperature sensitivity. The luminescence properties of Ru(bpy)3 2+ encapsulated in PVA were studied as a function of oxygen concentration and temperature and found to be independent of the former, but still very sensitive towards the latter. The results were fitted to an established Arrhenius-type equation, based on thermal quenching of the emitting state by a slightly higher (DeltaE= 3100 cm(-1))3d-d state that deactivates very rapidly (10(-13) s)via a non-radiative process.