Green-to-Red Electrochromic Fe(II) Metallo-Supramolecular Polyelectrolytes Self-Assembled from Fluorescent 2,6-Bis(2-pyridyl)pyrimidine Bithiophene
By Pai, Sandesh; Moos, Michael; Schreck, Maximilian H.; Lambert, Christoph; Kurth, Dirk G.
Published in Inorganic Chemistry
The structure and properties of metallo-supramolecular polyelectrolytes (MEPEs) self-assembled from rigid 2,6-bis(2-pyridyl)pyrimidine and the metal ions FeII and CoII are presented. While FeL1-MEPE (L1 = 1,4-bis[2,6-bis(2-pyridyl)pyrimidin-4-yl]benzene) is deep blue, FeL2- and CoL2-MEPE (L2 = 5,5?-bis[2,6-bis(2-pyridyl)pyrimidin-4-yl]-2,2?-bithiophene) are intense green and red in color, respectively. These novel MEPEs display a high extinction coefficient and solvatochromism. Ligand L2 shows a high absolute fluorescence quantum yield (?f = 82%). Viscosity and static light-scattering measurements reveal that the molar masses of these MEPEs are in the range of 1
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