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- Title
Bright Luminescent Platinum(II)‐Biaryl Emitters Synthesized Without Air‐Sensitive Reagents.
- Authors
Wakasugi, Chuei; Yoshida, Masaki; Sameera, W. M. C.; Shigeta, Yasuhiro; Kobayashi, Atsushi; Kato, Masako
- Abstract
Transition‐metal complexes bearing biaryl‐2,2′‐diyl ligands tend to show intense luminescence. However, difficulties in synthesis have prevented their further functionalization and practical applications. Herein, a series of platinum(II) complexes bearing biaryl‐2,2′‐diyl ligands, which have never been prepared in air, were synthesized through transmetalation and successive cyclometalation of biarylboronic acids. This approach does not require any air‐ or moisture‐sensitive reagents and features a simple synthesis even in air. The resulting (Et4N)2[Pt(m,n‐F2bph)(CN)2] (m,n‐F2bph=m,n‐difluorobiphenyl‐2,2′‐diyl) complexes exhibit intense green emissions with high quantum efficiencies of up to 0.80 at 298 K. The emission spectral fitting and variable‐temperature emission lifetime measurements indicate that the high quantum efficiency was achieved because of the tight packing structure and strong σ‐donating ability of bph.
- Subjects
QUANTUM efficiency; TRANSITION metals; PLATINUM; ANTHRACENE derivatives; LUMINESCENCE; LIGANDS (Chemistry)
- Publication
Chemistry - A European Journal, 2020, Vol 26, Issue 24, p5449
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201905821