1. Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec H4B 1R6, Canada, Department of Photonics, Institute of Physics, St.-Petersburg State University, St.-Petersburg, Russia, Department of Physics, Ulyanovsk State University Branch in Dimitrovgrad, Dimitrovgrad, Russia, and Dipartimento di Chimica Organica, Universita di Pavia, Via Taramelli 10, Pavia 27100, Italy