Platinum Complexes from C–H Activation of Sterically Hindered [C^N] Donor Benzothiophene Imine Ligands: Synthesis and Photophysical Properties

• Published in: ACS omega Vol. 5; no. 41; pp. 26855 - 26863
• Main Authors: Anderson, Craig M., Coffey, Belle, Morales, Leslie, Greenberg, Matthew W., Norman, Matthew, Weinstein, Michael, Brown, Garrett, Tanski, Joseph M.
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 20.10.2020
• ISSN: 2470-1343; 2470-1343
• DOI: 10.1021/acsomega.0c03993

Primary amines and benzothiophene-3-carboxaldehyde were reacted to give four large, bulky imine ligands. These imine ligands were reacted with a tetramethyl platinum dimer and by heteroatom-assisted C-H activation, both monometalated compounds and bismetalated compounds were synthesized. In all cases, five-membered platinacycles were formed. The compounds were characterized by NMR spectroscopy, and one bismetalated compound was characterized by single-crystal X-ray diffraction. The UV-vis absorption and emission spectra and the excited-state lifetimes were recorded for these complexes. Density functional theory (DFT) and time-dependent-DFT calculations were performed to aid in the assignment of the absorption and emission spectra of the newly synthesized complexes.