A C boolean AND N Cycloplatinated(II) Fluoride Complex: Photophysical Studies and C-sp(3)-F Bond Formation

by Hu, Jiyun; Nikravesh, Mahshid; Shahsavari, Hamid R.; Aghakhanpour, Reza Babadi; Rheingold, Arnold L.; Alshami, Mia; Sakamaki, Yoshie; Beyzavi, Hudson

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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 C-sp(3)-F bond formation at room temperature.

Journal
Inorganic Chemistry
Volume
59
Issue
22
Year
2020
Start Page
16319
ISBN/ISSN
0079-6123
PMID
33135890
DOI
10.1021/acs.inorgchem.0c02115