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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Ruthenium Dye Excitations and Relaxations in Natural Sunlight
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Ruthenium Dye Excitations and Relaxations in Natural Sunlight

机译：钌染料激动和放松在自然阳光下

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摘要

Solar harvesting devices using dyes convert the sun's energy to usable forms. The photophysics involved are generally investigated using time-resolved spectroscopic experiments with femto-second to nanosecond resolution. We show that a kinetic framework constructed from transient and linear absorption measurements of metal-ligand charge transfer states for a set of ruthenium complexes in solution can be used to simulate the steady-state dynamics of dyes adsorbed on a substrate under diffuse solar radiation. Even though the intensity of sunlight is relatively low, double excitations to higher excited states can occur. The steady-state populations show that the dyes' triplet state is the main species present besides the ground state. While small, these persistent excited populations can influence reactivity over the extended periods of time that the systems operate. The results show that non-radiative and optical events (dye(-1) s(-1)) within the singlet manifold and from the triplet state exhibit a dependence on ligand substituents.
机译：使用染料的太阳能收集装置将太阳能转化为可用形式。所涉及的光物理通常使用飞秒到纳秒分辨率的时间分辨光谱实验进行研究。我们证明，通过对溶液中一组钌配合物的金属配体电荷转移态的瞬态和线性吸收测量构建的动力学框架可用于模拟染料在漫太阳辐射下吸附在基底上的稳态动力学。即使太阳光的强度相对较低，也可能发生对更高激发态的双重激发。稳态种群表明，除了基态外，染料的三重态是主要的物种。尽管这些持续激发的粒子数很小，但它们可以在系统运行的较长时间内影响反应性。结果表明，单重态流形和三重态中的非辐射和光学事件（染料（-1）s（-1））表现出对配体取代基的依赖性。

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