Optical Sensing and Energy Transfer in Luminescent and Conductive COORNET Mixed-Matrix Membranes

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The objective of this joint proposal is to study the fundamental photophysical-properties and energy transfer in luminescent coordination networks (COORNETs) and in luminescent SURMOF thin films as well as the embedding of both into polymer membranes including conductive polymer matrixes. In addition to analytical investigations, simulation and modeling of energy transfer mechanisms will be performed. Furthermore, the photophysical processes accompanying the interaction of COORNETs/SURMOFs/composites with the relevant atmospheric gases moisture and oxygen will be investigated in comparison, as a sensor read out by modulation of the luminescence by energy transfer to or from analytes acts as the main sensor function. Oxygen and water sensitivity of COORNET/SURMOF luminescence shall be controlled, modulated and utilized by embedding them in organic polymer films, as photophysical parameters (processes, intensity, energy transfer in pathways and mechanism, lifetimes and efficacy) can be affected by such embedding of COORNETs/SURMOFs into polymer films. Thereby, the project addresses fundamental science by mechanistic investigation and modulation of photophysical properties. This will lead to a better understanding of the processes involved including energy transfer and its nature for the property modulation used for sensing. Furthermore, the project also contributes to the fundamental aspect of COORNET shaping and addresses parameters such as COORNET/SURMOF-polymer compatibility, chemical stability and polymer permeability. All of them are relevant for the sensing/detection of small molecules. Thereby, composites are aimed at that exceed classic complexes and the bulk COORNETs in stability, handling and long-term monitoring while retaining the general sensitivity of the luminescence sensing process. By combining conductive polymers with luminescent COORNETs and SURMOFs, novel optoelectronic components and devices shall be developed ranging from new sensors to novel MOF based electroluminescence devices. Electro¬luminescence constitutes a major achievement for coordination chemistry.