“…In recent years, the investigations on the synthesis of ferrocene-based heterocyclic compounds have been reported frequently due to their potential applications as electrochemical sensors [5][6][7][8][9][10][11][12], fluorescent probe [13,14], metal complexes [15] and heterogeneous catalysts [16,17]. Therefore, the integration of one or more ferrocene units into a heterocyclic compound has been recognized as an attractive way to entitle a molecule with new functions.…”