S1 Supporting Information Synthesis and characterization of pyrrolidin-2-one fused N-confused calix[4]phyrins Xiaofang Li, 1 Piotr J. Chmielewski, 2 Junfeng Xiang, 3 Jialiang Xu, 1 Yuliang Li*, 1 Huibiao Liu, 1 Daoben Zhu* 1 1 CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P.R. China 2 Department of Chemistry, University of Wroclaw, 14 F. Joliot-Curie Street, 50 383 Wroclaw,Poland 3 Center for Physiochemical Analysis & Measurement, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P.R. China E-mail: ylli@iccas.ac.cn