000202966 001__ 202966
000202966 005__ 20181203023644.0
000202966 0247_ $$2doi$$a10.1021/ic200704s
000202966 022__ $$a0020-1669
000202966 02470 $$2ISI$$a000294242700042
000202966 037__ $$aARTICLE
000202966 245__ $$aPhosphorescent Binuclear Iridium Complexes Based on Terpyridine-Carboxylate: An Experimental and Theoretical Study
000202966 260__ $$c2011
000202966 269__ $$a2011
000202966 336__ $$aJournal Articles
000202966 520__ $$aThe phosphorescent binuclear iridium(III) complexes tetrakis(2- phenylpyridine)μ-(2,2′:6′,2″-terpyridine-6, 6″-dicarboxylic acid)diiridium (Ir1) and tetrakis(2-(2,4-difluorophenyl) pyridine))μ-(2,2′:6′,2″-terpyridine-6,6″- dicarboxylic acid)diiridium (Ir2) were synthesized in a straightforward manner and characterized using X-ray diffraction, NMR, UV-vis absorption, and emission spectroscopy. The complexes have similar solution structures in which the two iridium centers are equivalent. This is further confirmed by the solid state structure of Ir2. The newly reported complexes display intense luminescence in dichloromethane solutions with maxima at 538 (Ir1) and 477 nm (Ir2) at 298 K (496 and 468 nm at 77 K, respectively) and emission quantum yields reaching ∼18% for Ir1. The emission quantum yield for Ir1 is among the highest values reported for dinuclear iridium complexes. It shows only a 11% decrease with respect to the emission quantum yield reported for its mononuclear analogue, while the molar extinction coefficient is roughly doubled. This suggests that such architectures are of potential interest for the development of polymetallic assemblies showing improved optical properties. DFT and time-dependent-DFT calculations were performed on the ground and excited states of the complexes to provide insights into their structural, electronic, and photophysical properties. © 2011 American Chemical Society.
000202966 700__ $$aAndreiadis, Eugen S.
000202966 700__ $$aImbert, Daniel
000202966 700__ $$aPecaut, Jacques
000202966 700__ $$aCalborean, Adrian
000202966 700__ $$aCiofini, Ilaria
000202966 700__ $$aAdamo, Carlo
000202966 700__ $$aDemadrille, Renaud
000202966 700__ $$0248440$$g166619$$aMazzanti, Marinella
000202966 773__ $$j50$$tInorganic Chemistry$$k17$$q8197-8206
000202966 909C0 $$xU12966$$0252515$$pGCC
000202966 909CO $$pSB$$particle$$ooai:infoscience.tind.io:202966
000202966 917Z8 $$x249835
000202966 937__ $$aEPFL-ARTICLE-202966
000202966 973__ $$rREVIEWED$$sPUBLISHED$$aOTHER
000202966 980__ $$aARTICLE