Assembly of Dynamic Heterometallic Oligoporphyrins Using Cooperative Zinc−Nitrogen, Ruthenium−Nitrogen, and Tin−Oxygen Coordination KimHee-Joon BamposNick K. M. SandersJeremy 1999 Assembly of Dynamic Heterometallic Oligoporphyrins Using Cooperative Zinc−Nitrogen, Ruthenium−Nitrogen, and Tin−Oxygen Coordination