The front cover artwork is provided by the Chemistry for Optics group at the Laboratory of Chemistry, ENS Lyon, University of Lyon, France (Homepage:
http://www.ens-lyon.fr/CHIMIE). The image shows how complexation of a simple chromophore with boron results in a spectacular improvement of its linear and nonlinear optical properties both in solution and in the solid state. Read the full text of the article at
10.1002/cphc.201600178.