1. Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
2. Department of Chemistry, University of Central Florida, P.O. Box 162366, Orlando, Florida 32816, United States
3. Departamento de Química, Universidad Simón Bolívar, Caracas 1080-A, Venezuela
4. CREOL/The College of Optics and Photonics, University of Central Florida, P.O. Box 162366, Orlando, Florida 32816, United States