Abstract
The front cover artwork is provided by the Functional Molecules and Inorganic Nanosystems Lab at ICMATE‐CNR and University of Padova (Italy). The image shows a europium luminescent molecular thermometer (LMT) with a maze on the background. It symbolizes the dead‐ends behind the design of new Eu‐LMTs for which we propose a predictive tool, named ThesEuS, developed from a library of Eu(III)‐β‐diketonates, in order to get out of the maze. Read the full text of the Article at 10.1002/cptc.2020000116.