From Event: SPIE Organic Photonics + Electronics, 2017
The photophysical properties of cyclometallated iridium compounds are beneficial for nonlinear optical (NLO) applications, such as the design of reverse saturable absorption (RSA) materials. We report on the NLO characterization of a family of compounds of the form [Ir(pbt)2(LX)], where pbt is 2-phenylbenzothiazole and LX is a beta-diketonate ligand. In particular, we investigate the effects of trifluoromethylation on compound solubility and photophysics compared to the parent acetylacetonate (acac) version. The NLO properties, such as the singlet and triplet excited-state cross sections, of these compounds were measured using the Z-scan technique. The excited-state lifetimes were determined from visible transient absorption spectroscopy.
Michael J. Ferry, Ryan M. O'Donnell, Neal Bambha, Trenton R. Ensley, William M. Shensky, and Jianmin Shi, "Reverse saturable absorption (RSA) in fluorinated iridium derivatives," Proc. SPIE 10360, Light Manipulating Organic Materials and Devices IV, 1036004 (Presented at SPIE Organic Photonics + Electronics: August 06, 2017; Published: 25 August 2017); https://doi.org/10.1117/12.2272715.
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