S 1 Supporting Information : Size-Independent Energy Transfer in Biomimetic Nanoring Complexes

B1. Synthesis of known compounds .......................................................................................... 2 B2. Synthesis of free-base dipyridyl-substituted porphyrin dimer (P2py2) ................................. 3 5-(3,5-Bis(dodecyloxy)-4-pyridyl)-15-(3,5-bis(trihexylsilyl)phenyl)-porphyrin (1) ......................... 3 [5-(3,5-Bis(dodecyloxy)-4-pyridyl)-15-(3,5-bis(trihexylsilyl)-phenyl)-porphyrinato]-zinc(II) (2) .... 4 [5,15-Dibromo-10-(3,5-bis(dodecyloxy)-4-pyridyl)-20-(3,5-bis(trihexylsilyl)-phenyl)porphyrinato]-zinc(II) (3) ................................................................................................................ 4 [5-(3,5-Bis(dodecyloxy)-4-pyridyl)-15-(3,5-bis(trihexylsilyl)-phenyl)-10,20-(trihexylsilylethynyl)porphyrinato]-zinc(II) (4) ................................................................................................................ 4 [5-(3,5-Bis(dodecyloxy)-4-pyridyl)-10-ethinyl-15-(3,5-bis(trihexylsilyl)-phenyl)20(trihexylsilylethynyl)-porphyrinato]-zinc(II) (5) .............................................................................. 5 Dimerization of [5-(3,5-bis(dodecyloxy)-4-pyridyl)-10-ethinyl-15-(3,5-bis(trihexylsilyl)-phenyl)20-(trihexylsilylethynyl)-porphyrinato]-zinc(II) (synthesis of dimer (6), P2py2-Zn) ...................... 5 Demetallation of zinc dimer P2py2-Zn (6) (synthesis of free-base dimer (7), P2py2) ................... 6 C. Determination of stoichiometries of complexes ................................................................................ 8

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