Supplementary information files for 'Energy and electron transfer reactions on silica gel and titania-silica mixed oxide surfaces'

Supplementary information files for 'Energy and electron transfer reactions on silica gel and titania-silica mixed oxide surfaces'<br>Abstract:The energy and electron transfer reactions of anthracene co-adsorbed with an electron donor on silica gel and titania-silica mixed oxides have been studied by a combination of steady state reflectance, emission spectroscopy, and nanosecond diffuse reflectance laser flash photolysis. Bimolecular rate constants for energy and electron transfer between anthracene and azulene have been measured; kinetic analysis of the decay of the anthracene triplet state and radical cation show that the kinetic parameters depend on the titania content of the sample and the azulene loading. The rate of energy and electron transfer reactions increases as a function of azulene loading and decreases with increasing titania content in titania-silica mixed oxides. These findings indicate that the observed rate of reaction is determined by the rate of diffusion of anthracene on the titania-silica surfaces whereas, in contrast, the observed rate of reaction on silica gel is predominantly governed by the rate of diffusion of azulene.<br>

《硅胶与钛硅混合氧化物表面的能量与电子转移反应》补充信息文件
摘要：本研究结合稳态反射光谱、发射光谱与纳秒漫反射激光闪光光解技术，对硅胶及钛硅混合氧化物表面上与电子给体共吸附的蒽所发生的能量转移与电子转移反应展开了探究。本研究测定了蒽与薁之间能量转移与电子转移的双分子速率常数；通过对蒽三重态与自由基阳离子的衰减动力学分析发现，动力学参数取决于样品的二氧化钛含量与薁负载量。在钛硅混合氧化物表面，能量与电子转移反应速率随薁负载量升高而增大，随二氧化钛含量提升而降低。上述研究结果表明，钛硅混合氧化物表面的表观反应速率由蒽在该表面的扩散速率决定；与之相反，硅胶表面的表观反应速率则主要由薁的扩散速率主导。