1 Supplementary Material High Nuclearity Assemblies and One-Dimensional (1D) Coordination Polymers Based on Lanthanide−Copper 15-Metallacrown-5 Complexes (Ln III = Pr, Nd, Sm, Eu) Anna V. Pavlishchuk, a, b * Sergey V. Kolotilov, b Matthias Zeller, c Samuel E. Lofland, d Laurence K. Thompson, e Anthony W. Addison f * and Allen D. Hunter c a Department of Chemistry, Taras Shevchenko National University of Kyiv, Volodymyrska str. 62, Kiev, 01601, Ukraine; b L.V. Pisarzhevskii Institute of Physical Chemistry of the National Academy of Sciences of the Ukraine, Prospect Nauki 31, Kiev 03028, Ukraine; c STaRBURSTT CyberInstrumentation Consortium and Department of Chemistry, Youngstown State University, One University Plaza, Youngstown Ohio 44555-3663, U.S.A.; Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IA 47907-2084 U.S.A.; Email: zeller4@purdue.edu d Department of Physics and Astronomy, Rowan University, Glassboro, New Jersey 08028, U.S.A.; e Department of Chemistry, Memorial University, St. John’s, Newfoundland, A1B 3X7, Canada; f Department of Chemistry, Drexel University, Philadelphia, PA 19104-2816, U.S.A.