vis/NIR transient absorption spectrometer

在这个项目中，物理化学和理论化学研究所的研究重点“光-物质-相互作用”通过调试可见光和近红外范围的瞬时吸收光谱仪而得到扩大。参与该项目的工作组将使用该设备回答使用泵浦-探测光谱分析分子和固态材料光学性质领域的各种问题。所研究的材料范围从无机半导体纳米晶到等离子体纳米粒子和纳米团簇，再到过渡金属和稀土络合物、并苯或茂金属衍生物和有机硼/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，如长寿命三重态的衰变或光化学反应中高活性中间阶段的形成。对于这一广谱材料和工艺的研究是有保障的，测量时间窗口为150ps到400µs的S，泵浦和探测光的波长范围在350 nm到1600 nm之间可自由选择。这些研究项目的发现将为所研究的材料在发光二极管、光开关和传感器中的优化应用以及阐明新型分子化合物的反应路径提供有价值的信息。

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.