MOF Based Sorption Sensors by Rare Earth Luminescence

该项目的重点是两个属性的组合：发光和吸附，其依赖性呈现一个新的传感器吸附通过观察发射访问。在前期的研究中，人们成功地证明了发光可以作为一种内在的性质被应用到Ln-N-MOFs中，从而导致了今天已知的具有最高量子效率的MOFs。还证明了在相同的MOF材料中观察到微孔与发光的组合，并且发光可以被某些吸附剂淬灭。为了提高选择性，第二阶段的目标是具有既适合作为天线又适合作为孔系统改性剂的连接剂的新的MOF。包括基于官能化富勒烯的新型反式MOFs，其中有机连接体构成由金属离子互连的连接中心。这提供了两个视角：在吸附时具有改进的猝灭选择的固有发光以及将发光纳米颗粒包含到反MOF中。与不包含这些颗粒的传统MOF和ZIF相比，官能化富勒烯提供了与其自身延伸的纳米间距。将通过光致发光光谱、量子产率、衰减测定和孔隙率（使用BET和漂移天平，压力高达200 bar）来表征发光。该项目的最终目标是通过同时进行荧光/孔隙度研究来量化发光与吸附的相关性，以评估传感器的效果。

The project focuses on a combination of two properties: luminescence and sorption, with their depen-dency rendering a new sensoring for sorption accessible via observation of an emission. In the prelim-inary period it was successfully shown that luminescence can be implemented into Ln-N-MOFs as an intrinsic property leading to the MOFs with the highest quantum efficiencies known today. It was also proven that microporosity is observed in combination with luminescence in the same MOF material and that luminescence can be quenched by certain adsorbants. To improve the selectivity, new MOFs with linkers suitable both as antennas as well as modifiers of the pore systems are aims of the second period. Novel inverse MOFs based on functionalized fullerenes are included in which the organic linker constitutes the connectivity centers interlinked by metal ions. This offers two perspectives: Intrinsic luminescence with improved quenching options upon sorption as well as the inclusion of luminescent nanoparticles into the inverse MOF. Functionalized fullerenes offer nanometer spacing from their own extensions in contrast to conventional MOFs and ZIFs that do not incorporate these particles. Lumi-nescence will be characterized by photoluminescence spectroscopy, quantum yield, decay determina-tions, and porosity utilizing BET and drifting balances for pressures up to 200 bar. Quantification of the dependency luminescence versus sorption to evaluate the sensor effect by simultaneous fluorescence / porosity studies is the final goal of the project.