Transient absorption spectrometer

瞬态吸收光谱仪

• 批准号: 437688665
• 金额: --
• 依托单位: Technische Universität Dortmund
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2020
• 资助国家: 德国
• 起止时间: 2019-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/437688665?language=en
• 关键词: Transient; absorption; spectrometer

The group of Prof. Dr. Andreas Steffen has focussed on the synthesis and photophysical investigation of d10 transition metal complexes of highly abundant elements such as copper, silver and zinc, and their application in light-emitting devices, as sensors and photocatalysts. The appointment of Prof. Steffen at the TU Dortmund is expected to strengthen the activities in the area of functional materials. In order to realize the proposed work and projects, which will be briefly summarized in the following, the purchase of a transient absorption spectrometer is mandatory and the TU Dortmund strongly supports this application.Many of the photoactive metal complexes of interest show, apart from efficient triplet state population, thermally activated delayed fluorescence, by which beneficial fast lifetimes and high luminescence efficiencies can be realized. Also, we realized that multimetallic complexes can emit from several excited states in parallel, which led to the development of molecular white light emitters and stimulus-responsive materials. In another project, highly efficient photocatalysts for borylation and hydroamination reactions based on energy transfer have been developed by a detailed analysis of the excited state properties of the sensitizer units.In order to gain control and to allow for target-oriented design of the excited states with regard to lifetime, energy, efficiency and reactivity, the elucidation not only of the emission properties, but of the population paths including the presence of intermediary states and emission mechanisms of the excited states is of utmost importance. Only then structure-property relationships can be formulated and subsequently ultrafast emitters, highly efficient photocatalysts and sensors can be developed for applications. For a thorough understanding of the intersystem-crossing, internal conversion, energy transfer and single-electron transfer processes, as well as of the intermediates in photocatalytic conversions, kinetic studies of the photoexcited states with a transient absorption spectrometer are absolutely mandatory.An added value results from the purchase of this major instrument due to planned specific collaborations with the groups of Prof. Dr. Guido Clever and Prof. Dr. Carsten Strohmann at the TU Dortmund. The group of Prof. Clever published their first forays in to the field of chiral luminescent platinum complexes as well as of photoactive supramolecular cage structures, and in the future they will investigate photoswitchable and –responsive structures together with the group of Prof. Steffen. With the purchase of the transient absorption spectrometer, the group of Prof. Strohmann has the opportunity to study luminescent copper halide cluster compounds and coordination polymers on-site, so that even highly sensitive compounds can be measured with regard to their photokinetic behaviour.

Andreas Steffen教授的团队专注于高含量元素（如铜、银和锌）的d10过渡金属配合物的合成和光物理研究，以及它们在发光器件中的应用，如传感器和光催化剂。Steffen教授在多特蒙德工业大学的任命预计将加强功能材料领域的活动。为了实现提议的工作和项目，下面将简要总结，购买瞬态吸收光谱仪是强制性的，多特蒙德工业大学强烈支持这一申请。许多感兴趣的光活性金属配合物除了表现出高效的三重态居群外，还表现出热激活的延迟荧光，从而可以实现有益的快速寿命和高发光效率。此外，我们意识到多金属配合物可以从多个激发态并行发射，这导致了分子白光发射器和刺激响应材料的发展。在另一个项目中，通过详细分析敏化剂单元的激发态性质，开发了基于能量转移的高效硼化和氢胺化反应光催化剂。为了在寿命、能量、效率和反应性方面对激发态进行控制和目标导向设计，不仅要阐明发射特性，而且要阐明激发态的居群路径，包括中间态的存在和发射机制，这是至关重要的。只有这样，结构-性能关系才能形成，随后超快发射器，高效光催化剂和传感器才能开发应用。为了深入了解系统间交叉、内部转换、能量转移和单电子转移过程，以及光催化转换中的中间体，用瞬态吸收光谱仪进行光激发态的动力学研究是绝对必要的。由于计划与多特蒙德工业大学的Guido Clever博士教授和Carsten Strohmann博士教授小组进行具体合作，因此购买这一主要仪器产生了附加价值。Clever教授小组发表了他们在手性发光铂配合物和光活性超分子笼结构领域的首次尝试，未来他们将与Steffen教授小组一起研究光开关和响应结构。随着瞬态吸收光谱仪的购买，Strohmann教授的研究小组有机会在现场研究发光的卤化铜簇化合物和配位聚合物，这样即使是高度敏感的化合物也可以测量它们的光动力学行为。