A C^N Cycloplatinated(II) Fluoride Complex: Photophysical Studies and C <sub> sp <sup>3</sup> </sub> –F Bond Formation
Ji‐Yun Hu, Mahshid Nikravesh, Hamid R. Shahsavari, Reza Babadi Aghakhanpour, Arnold L. Rheingold, Mia Alshami, Yoshie Sakamaki, M. Hassan Beyzavi
Abstract
This work reports the synthesis and characterization of a new C^N-based cycloplatinated(II) fluoride complex, [Pt(ppy)(PPh3)F] (2; ppy = 2-phenylpyridinate), involving a Pt–F bond. The new complex is highly luminescent in the green area with a high quantum yield of 94.6% at 77 K. A comparison study of the heavier halogen derivatives reveals a descending emission quantum yield order of F > Cl > Br > I. Time-dependent density functional theory calculations ascribe the decreased emission efficiency to the decreasing trend of an intraligand (IL) transition from F to I, which accounts for the major radiative pathway. In addition, 2 is capable of the fluorinating alkyl halides, leading to Csp3–F bond formation at room temperature.