@article{jiang_cañada_nguyen_halamicek_nguyen_teets_2023, title={Substituent-Dependent Azide Addition to Isocyanides Generates Strongly Luminescent Iridium Complexes}, volume={145}, url={http://dx.doi.org/10.1021/jacs.2c11062}, DOI={10.1021/jacs.2c11062}, abstractNote={Ligand-centered functionalization reactions offer diverse strategies to prepare luminescent organometallic compounds. These compounds can have unique structures that are not accessible via traditional coordination chemistry and can possess enhanced or unusual photophysical properties. Here we show that bis-cyclometalated iridium bis-isocyanide complexes (1) react with azide (N3-) to form novel luminescent structures. The fate of the reaction with azide is determined primarily by the substituent on the aryl isocyanide. Those with electron-withdrawing substituents (CF3 or NO2) react with 1 equiv of azide followed by N2 extrusion, forming aryl cyanamido products (2). With electron-donating groups on the aryl isocyanide the reactivity is more diverse, and three outcomes are possible. In two cases, the isocyanide and azide undergo a [3 + 2] cycloaddition to form a C-bound tetrazolato structure (3). In three other cases, 2 equiv of azide are involved in the formation of a previously unobserved structure, where a tetrazolato and aryl cyanamido couple and rearrange to form a chelating ligand comprised of an N-bound tetrazolato and an acyclic diaminocarbene (4). Finally, a bimetallic aryl cyanamido complex (5) is isolated in one case. All compounds are luminescent, some with exceptional photoluminescence quantum yields as high as 0.81 in solution for sky-blue emission, and 0.87 for yellow emission and 0.65 for orange-red emission in polymer films.}, number={2}, journal={Journal of the American Chemical Society}, publisher={American Chemical Society (ACS)}, author={Jiang, Chenggang and Cañada, Louise M. and Nguyen, Ngoc Bao and Halamicek, Michael D. S. and Nguyen, Sami H. and Teets, Thomas S.}, year={2023}, month={Jan}, pages={1227–1235} }
 @article{wu_sutton_halamicek_xing_bao_teets_2022, title={Cyclometalated iridium-coumarin ratiometric oxygen sensors: improved signal resolution and tunable dynamic ranges}, volume={13}, url={http://dx.doi.org/10.1039/d2sc02909j}, DOI={10.1039/d2sc02909j}, abstractNote={Cyclometalated iridium(iii) coumarin complexes with improved signal resolution for ratiometric oxygen sensing are described. Dynamic ranges are tunable over >2 orders of magnitude.}, number={30}, journal={Chemical Science}, publisher={Royal Society of Chemistry (RSC)}, author={Wu, Yanyu and Sutton, Gregory D. and Halamicek, Michael D. S. and Xing, Xinxin and Bao, Jiming and Teets, Thomas S.}, editor={Halamicek, MichaelEditor}, year={2022}, month={Jul}, pages={8804–8812} }