FOM Institute for Atomic and Molecular Physics, Science Park 104, 1098 XG Amsterdam, The Netherlands.
J Chem Phys. 2013 Jul 28;139(4):044505. doi: 10.1063/1.4816370.
We study the influence of Förster energy transfer on the vibrational relaxation dynamics of anionic hydration shells by performing time-resolved mid-infrared spectroscopy on the OH-stretch vibration of water molecules in aqueous solutions of sodium iodide. We observe that the Förster energy transfer leads to a pronounced acceleration of the vibrational relaxation. We describe the observed dynamics with a model in which we include the Förster vibrational energy transfer between the different hydroxyl groups in solution. With this model we can quantitatively describe the experimental data over a wide range of isotopic compositions and salt concentrations. Our results show that resonant energy transfer is an efficient mechanism assisting in the vibrational relaxation of anionic hydration shells.
我们通过对碘化钠水溶液中水分子的 OH 伸缩振动进行时间分辨中红外光谱研究，研究了福斯特能量转移对阴离子水合壳振动弛豫动力学的影响。我们观察到福斯特能量转移导致振动弛豫明显加速。我们用一个模型来描述观察到的动力学，该模型中我们包括了溶液中不同羟基之间的福斯特振动能量转移。通过这个模型，我们可以在很宽的同位素组成和盐浓度范围内定量描述实验数据。我们的结果表明，共振能量转移是一种有效的机制，有助于阴离子水合壳的振动弛豫。
