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meso ‐(2‐Pyridyl)‐boron(III)‐subporphyrin: Perimeter Iridium(III) Coordination
Author(s) -
Lavarda Giulia,
Shimizu Daiki,
Torres Tomás,
Osuka Atsuhiro
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201914853
Subject(s) - iridium , phosphorescence , diastereomer , chemistry , boron , yield (engineering) , catalysis , photochemistry , crystallography , medicinal chemistry , stereochemistry , materials science , organic chemistry , fluorescence , physics , metallurgy , quantum mechanics
Peripherally metalated porphyrinoids are promising functional π‐systems displaying characteristic optical, electronic, and catalytic properties. In this work, 5‐(2‐pyridyl)‐ and 5,10,15‐tri(2‐pyridyl)‐B III ‐subporphyrins were prepared and used to produce cyclometalated subporphyrins by reactions with [Cp*IrCl 2 ] 2 , which proceeded through an efficient C−H activation to give the corresponding mono‐ and tri‐Ir III complexes, respectively. While the mono‐Ir III complex was obtained as a diastereomeric mixture, a C 3 ‐symmetric tri‐Ir III complex with the three Cp*‐units all at the concave side was predominantly obtained in a high yield of 90 %, which displays weak NIR phosphorescence even at room temperature in degassed CH 2 Cl 2 , differently from the mono‐Ir III complexes.