[EN] METHOD FOR THE SYNTHESIS AND ISOLATION OF FACIAL-TRIS-HOMOLEPTIC PHENYLPYRIDINATO IRIDIUM (III) PHOTOCATALYSTS<br/>[FR] PROCÉDÉ DE SYNTHÈSE ET D'ISOLEMENT DE PHOTOCATALYSEURS AU PHÉNYLPYRIDINATO-IRIDIUM (III) FACIAL-TRIS-HOMOLEPTIQUE
申请人:THJE BOARD OF REGENTS OF OKLAHOMA STATE UNIV
公开号:WO2018165134A1
公开(公告)日:2018-09-13
Methods of synthesizing and isolating facial-tris-homoleptic phenylpyridinato iridium (III) photocatalysts are disclosed. Also disclosed are methods of recovering excess 2- phenylpyridine ligands from said syntheses.
Ligand functionalization as a deactivation pathway in a fac-Ir(ppy)<sub>3</sub>-mediated radical addition
作者:James J. Devery III、James J. Douglas、John D. Nguyen、Kevin P. Cole、Robert A. Flowers II、Corey R. J. Stephenson
DOI:10.1039/c4sc03064h
日期:——
Kinetic, synthetic, and spectroscopic evidence demonstrates the instability of fac-Ir(ppy)3 under visible light-mediated photoredox conditions resulting from in situ functionalization.
Facile synthesis and complete characterization of homoleptic and heteroleptic cyclometalated Iridium(III) complexes for photocatalysis
作者:Anuradha Singh、Kip Teegardin、Megan Kelly、Kariate S. Prasad、Sadagopan Krishnan、Jimmie D. Weaver
DOI:10.1016/j.jorganchem.2014.10.037
日期:2015.1
Herein we describe an improved synthesis for homoleptic iridium(III) 2-phenylpyridine based photocatalysts that allows rapid access to these compounds in good to high yields which have recently become a vital component within the field of catalysis. In addition, we synthesized a number of heteroleptic iridium(III) 2-phenylpyridine photocatalysts and report their photophysical and electrochemical properties. The emission energies span the range of 473-560 nm and reduction potentials from -2.27 V to -1.23 V and oxidation potentials ranging from 1.81 V to 0.69 V. Additionally, we provide the calculated excited state properties and comment on the role of these properties in designing catalytic cycles. (C) 2014 Elsevier B.V. All rights reserved.
Luminescent Ir(C^N)3 complexes (C^N = cyclometalated arylpyridine ligand) exist in the form of two stable isomers with distinct photophysical and electrochemical properties: fac and mer. Herein, we show that fac-Ir(C^N)3 complexes can be converted into the thermodynamically less stable mer forms by a consecutive reaction with first acid and then base. The chemically induced isomerization is fast, quantitative