000184320 001__ 184320
000184320 005__ 20181203023013.0
000184320 0247_ $$2doi$$a10.1021/om300557d
000184320 022__ $$a0276-7333
000184320 02470 $$2ISI$$a000308513000040
000184320 037__ $$aARTICLE
000184320 245__ $$aBlue Phosphorescence of Trifluoromethyl- and Trifluoromethoxy-Substituted Cationic Iridium(III) Isocyanide Complexes
000184320 260__ $$aWashington$$bAmerican Chemical Society$$c2012
000184320 269__ $$a2012
000184320 300__ $$a9
000184320 336__ $$aJournal Articles
000184320 520__ $$aWe report the first comprehensive comparative synthetic, structural, electrochemical, and spectroscopic study of an extended series of fluorocarbon-modified iridium(III) complexes. We prepared seven new cationic Ir(III) complexes with tert-butyl isocyanide and trifluoromethyl- or trifluoromethoxy-substituted cyclometalating 2-phenylpyridines, [(C boolean AND N)(2)Ir(CNtBu)(2)](CF3SO3), and characterized five of them by crystal structure analysis. The redox potentials and photophysical properties of Ir(III) complexes are determined by the type, position, and number of fluorocarbon groups in the cyclometalating ligand. The complexes exhibit pale blue to yellow-green phosphorescence at room temperature with quantum yields and excited-state lifetimes up to 73% and 84 mu s in solution (under argon) and 7.5% and 4.3 mu s in neat solid (under air). The structured and solvent-independent phosphorescence spectra, with 0-0 emission transition at 445-467 nm, and the long calculated radiative lifetimes, 43-160 mu s, indicate that the complexes emit from a cyclometalating-ligand-centered triplet excited state. Bulky fluorocarbon groups prevent intermolecular interaction (aggregation) of the complexes, thereby minimizing red-shift of phosphorescence color in going from solution to neat solid.
000184320 700__ $$0244226$$aShavaleev, Nail M.$$g178166$$uEcole Polytech Fed Lausanne, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland
000184320 700__ $$aMonti, Filippo
000184320 700__ $$0240189$$aScopelliti, Rosario$$g148592$$uEcole Polytech Fed Lausanne, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland
000184320 700__ $$aArmaroli, Nicola
000184320 700__ $$0240191$$aGraetzel, Michael$$g105292$$uEcole Polytech Fed Lausanne, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland
000184320 700__ $$0240422$$aNazeeruddin, Mohammad K.$$g105958$$uEcole Polytech Fed Lausanne, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland
000184320 773__ $$j31$$k17$$q6288-6296$$tOrganometallics
000184320 909C0 $$0252060$$pLPI$$xU10101
000184320 909CO $$ooai:infoscience.tind.io:184320$$pSB$$particle
000184320 917Z8 $$x105528
000184320 937__ $$aEPFL-ARTICLE-184320
000184320 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000184320 980__ $$aARTICLE