5-(Hetero)aryl-Substituted 9-Hydroxyphenalenones: Synthesis and Electronic Properties of Multifunctional Donor-Acceptor Conjugates
作者:Lisa Bensch、Irina Gruber、Christoph Janiak、Thomas J. J. Müller
DOI:10.1002/chem.201700553
日期:2017.8.4
5-(Hetero)aryl-substituted 9-hydroxyphenalenones (9-HP) can be readily synthesized by Suzuki coupling of 5-bromo 9-HP with (hetero)aryl boronic acid (derivatives) without protection of the hydroxyl functionality in moderate to excellent yields (57–94 %). A library of 5-(hetero)aryl substituted 9-HP with broad substituent variation was studied with respect to their electronic properties (absorption
9-dithiophenalenylium salt with benzene spacer has been prepared as the precursor for a phenalenyl-based high spin radical. Electrochemical studies show that this salt undergoes two three-electron reduction steps and generate its corresponding neutralradical, which has been studied by quantum chemical calculations. The investigation of the spin density distribution of the radical revealed that the spin and