Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Marc Kielmann and Mathias O. Senge,Molecular Engineering of Free‐Base Porphyrins as Ligands—The N−H⋅⋅⋅X Binding Motif in Tetrapyrroles,Angewandte Chemie International Edition,1433-7851,Wiley,2018-11-05,58,2,418-441,https://cir.nii.ac.jp/crid/1363670320061365760,https://doi.org/10.1002/anie.201806281