1. Multifunctional Optical Materials Group, Instituto de Ciencia de Materiales de Sevilla (Consejo Superior de Investigaciones Científicas-Universidad de Sevilla), Calle Américo Vespucio 49, 41092 Sevilla, Spain
2. Theoretical Chemistry, Chemical Center, Lund University, SE-223 62 Lund, Sweden
3. School of Engineering and IT, Murdoch University, 90 South Street, Murdoch, Western Australia 6150, Australia
4. Department of Energy and Process Engineering, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway