Klaus Muellen: The Chemistry Got to Be RightLives in ChemistryLebenswerke in der Chemie Klaus Muellen, born in Cologne in 1947, is what locals proudly call a true klsche Boysomeone deeply shaped by his hometown. As a young student, he discovered the world of delocalized electron systems; his doctoral work in Switzerland triggered his love for spectroscopic methods. After academic wanderings along the Rhine, he eventually turned to macromolecules at the Max Planck Institute for Polymer Research