Charge Transfer Photochemistry in Metal-Organic Complexes

在无机化学、生物无机化学和金属有机化学计划中，这个项目涉及使用电子给体配体，这些配体在光化学诱导电子转移后经历不可逆的碎裂，以探索激发态过渡金属系统的动力学。原则上，使用电子转移后发生的不可逆化学反应将允许确定激发态动力学，这是直接时间分辨光谱方法无法获得的。该方法将应用于使用纳秒/皮秒瞬时吸收光谱和量子产额测量的分子和离子配对系统。电磁辐射的吸收是随着吸收分子激发态的形成而发生的。这种吸收的能量发生了什么，很大程度上取决于激发态的寿命。这个项目旨在获得关于各种过渡金属化合物中激发态行为的基本信息。归根结底，从这些研究中获得的信息可能有助于开发更好的太阳能转换化学方法。

This project, in the Inorganic, Bioinorganic, and Organometallic Chemistry Program, is concerned with the use of electron donor ligands that undergo irreversible fragmentation after photochemically induced electron transfer to probe the dynamics of excited state transition metal systems. In principle, the use of an irreversible chemical reaction that occurs after the electron transfer will allow for the determination of excited state dynamics that cannot be obtain by direct time resolved spectroscopic methods. The method will be applied to molecular and ion paired systems using nanosecond/picosecond transient absorption spectroscopy and quantum yield measurements. Absorption of electromagnetic radiation occurs with the formation of an excited state of absorbing molecule. What happens to this absorbed energy very much depends upon the lifetime of the excited state. This project is designed to acquire fundamental information about the behavior of excited states in a variety of transition metal compounds. Ultimately the information obtained from these studies may prove useful in developing better chemical methods of solar energy conversion.