Luminescence spectrometer

发光光谱仪

• 批准号: 461842662
• 金额: --
• 依托单位: Johannes Gutenberg-Universität Mainz
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2021
• 资助国家: 德国
• 起止时间: 2020-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/461842662?language=en
• 关键词: Luminescence; spectrometer

With the requested instrumentation, the applicants will characterize discrete luminescent complexes and molecules or ensembles thereof in fluid and frozen solutions, solids and films. Samples will be investigated at variable temperatures down to 77 K to suppress vibrational relaxation, geometric distortion and thermally activated surface crossing and to study thermal equilibration of close-lying excited states, in particular spin-flip states, and thermally-activated delayed fluorescence processes. Besides photoluminescence spectra, (absolute) luminescence quantum yields and excited state lifetimes of novel luminophores, we will also determine time-resolved decays in the absence and presence of potential quenchers and substrates for the advancement of photochemical reactions with transition metal complexes and organic photocatalysts (intensity and lifetime-based Stern-Volmer analyses). High spectral resolution and broad excitation and detection ranges (UV/Vis/NIR) will be combined with high temporal resolution (from sub-ns to seconds) to cover all diverse investigated systems of the applicants.

利用所需的仪器，申请人将表征流体和冷冻溶液、固体和薄膜中离散的发光复合物和分子或其整体。样品将在低至 77 K 的可变温度下进行研究，以抑制振动弛豫、几何畸变和热激活表面交叉，并研究紧密激发态（特别是自旋翻转态）和热激活延迟荧光过程的热平衡。除了新型发光体的光致发光光谱、（绝对）发光量子产率和激发态寿命之外，我们还将确定在不存在和存在潜在猝灭剂和底物的情况下的时间分辨衰变，以促进过渡金属配合物和有机光催化剂的光化学反应。基于强度和寿命的 Stern-Volmer 分析）。高光谱分辨率和宽激发和检测范围（紫外/可见/近红外）将与高时间分辨率（从亚纳秒到秒）相结合，以覆盖申请人的所有不同的研究系统。