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Department of Chemistry and Chemical Biology
Studenten im Sommer auf dem Campus Nord, rote Zahnräder im Hintergrund © Roland Baege​/​TU Dortmund

FOR 5781

The image shows a blue icosahedron — a polyhedron with twenty faces — which serves as a representation of solids in the crystalline phase. The face in the center of the icosahedron shows a green luminescence spectrum that transitions to a red spectrum under the influence of an external stimulus. That means it changes its characteristic photophysical properties — such as the lifetime of the emitting state, the quantum yield, the emission wavelength, or the dissymmetry factor g lum. The outermost surfaces feature lettering that names various stimuli — namely pressure, tensile and shear forces, friction, electric and magnetic fields. The surfaces between the spectra and lettering depict three simplified complex structures of copper, platinum, and chromium — including the number of d electrons: a linear copper one complex with a d ten configuration, a tetrahedral platinum two complex with a d eight configuration, and an octahedral chromium three complex with a d three configuration. These are prototypical classes of compounds that are being investigated as part of this research group. © Andreas Steffen​/​TU Dortmund

Being globally the first collaborative network on this topic, the DFG Research Unit FOR 5781 “STIL-COCOs” aims to establish structure-property relationships of luminescent stimuli-responsive (SR) metal complexes for future application in photonic key technologies, such as advanced device technologies, multi-parameter sensing, anticounterfeiting methods, and quantum IT. To this end, our team of 9 research groups combines their expertise to investigate pressure, stress, magnetic and electric field effects on the photophysical properties of the most fundamental coordination geometries.