1. Contribution from the Institut de Ciencia Molecular (IcMol), Universitat de Valencia, 46100-Burjassot, Valencia, Spain, Centre for Electronic Materials and Devices, Department of Chemistry, Imperial College London, Exhibition Road, London SW7 2AY, U.K., ICREA and Institute of Chemical Research of Catalonia (ICIQ), 43007 Tarragona, Spain, and Laboratory for Photonics and Interfaces, Institute of Molecular and Biological Chemistry, School of Basic Sciences, Swiss Federal Institute of Technology, CH-1015...