1. Department of Chemistry; Texas A&M University-Kingsville; Kingsville Texas 78363
2. Dipartimento di Scienza Applicata e Tecnologia; Politecnico di Torino, Alessandria campus, Viale Teresa Michel 5; 15121 Alessandria Italy
3. Department of Chemistry; Texas A&M University-Qatar; Doha Qatar
4. Department of Chemistry; Sam Houston State University; Huntsville Texas 77341