1. Department of Chemistry Wayne State University 5101 Cass Avenue Detroit MI 48202 USA
2. College of Chemistry, Chemical Engineering and Materials Science Collaborative Innovation Center of Functionalized Probes for, Chemical Imaging Key Laboratory of Molecular and Nano Probes Ministry of Education Shandong Normal University Jinan 250014 P. R. China
3. Dipartimento di Scienze e Innovazione Tecnologica Università del Piemonte Orientale “Amedeo Avogadro” Viale T. Michel 11 15121 Alessandria Italy