General. Unless otherwise mentioned, all chemicals were obtained from Merck. For spectroscopic studies, HPLC grade solvents were used. Free-base 5,10,15-tris(4cyanophenyl)corrole was prepared previously reported. Elemental analyses were carried out with a Euro EA elemental analyser. UV-vis absorption spectra were acquired on a Perkin-Elmer LAMBDA-750 spectrophotometer. Emission spectra were recorded on an Edinburgh FLS920 spectrofluorimeter equipped with a Ge-detector using an optical cell with . The data were corrected for Lorentz polarization and absorption effects. The structure was solved with intrinsic phasing methods (SHELXT40 80 ) and refined by full matrix least squares on F 2 (SHELXL-201841 ). Hydrogen atoms were included in the refinement as riding atoms. Contributions of H atoms for the water molecules were included but were not fixed. Disordered solvent molecules were taken out using the SQUEEZE command in PLATON. The corresponding CCDC no of TBA + [H2Cor -] is 2258522.