vis/NIR transient absorption spectrometer

通过该项目，物理和理论化学研究所的研究重点“光物质相互作用”通过对可见光和近红外范围的瞬态吸收光谱仪的调试而得到扩展。参与该项目的工作组将使用该设备来回答使用泵浦探测光谱学的分子和固态材料的光学特性领域的各种问题。所研究的材料范围从无机半导体纳米晶体到等离子体纳米颗粒和纳米团簇到过渡金属和镧系元素络合物、并苯或二萘嵌苯衍生物和有机硼/硼-氮化合物。超快的电子过程，如热电子的转移和相对较慢的过程，如长寿命的三重态的衰变或在光化学反应中形成高活性的中间阶段进行检查。通过150 fs至400 µs的宽测量时间窗口和350 nm至1600 nm之间的泵浦和探测光束的大范围自由选择波长，可以保证对这种宽范围材料和工艺的研究。这些研究项目的结果将为所研究材料在发光二极管中的优化应用提供有价值的信息，光学开关和传感器以及阐明新分子化合物的反应路径。

With this project, the research focus “Light-Matter-Interactions” at the Institute for Physical and Theoretical Chemistry is expanded by the commissioning of a transient absorption spectrometer for the visible as well as the near infrared range. The working groups involved in the project will use the device to answer various questions in the field of the optical properties of molecular and solid-state materials using pump-probe spectroscopy. The investigated materials range from inorganic semiconductor nanocrystals to plasmonic nanoparticles and nanoclusters to transition metal and lanthanoid complexes, acene or perylene derivatives and organic boron / boron-nitrogen compounds. Ultra-fast electronic processes such as the transfer of hot electrons and relatively slow processes such as the decay of long-lived triplet states or the formation of highly reactive intermediate stages in photochemical reactions are examined. Research into this broad spectrum of materials and processes is guaranteed by a wide measurement time window of 150 fs to 400 µs and a large range of freely selectable wavelengths for the pump and probe beam between 350 nm and 1600 nm.The findings from these research projects will provide valuable information for the optimized application of the investigated materials in light-emitting diodes, optical switches and sensors as well as the elucidation of reaction paths to novel molecular compounds.