1. Department
of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
2. Spectroscopy
Laboratory for Functional π-Electronic Systems and Department
of Chemistry, Yonsei University, Seoul 03722, Korea
3. Department of Materials Science & Engineering, National University of Singapore, 119260 Singapore
4. Department
of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
5. Departament
de Ciència de Materials i Química Física, Institut
de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, Martí i Franquès 1-11, Barcelona 08028, Spain
6. Kimika Fakultatea, Euskal Herriko Unibertsitatea & Donostia International Physics Center, Paseo Manuel de Lardizabal, 4, 20018 Donostia-San Sebastián, Euskadi, Spain
7. IKERBASQUE - Basque Foundation for Science, Bilbao 48013, Euskadi, Spain