Details

Autor(en) / Beteiligte

• Li, Jiayi
• Wang, Liding
• Zhao, Zifeng
• Li, Xiaoyue
• Yu, Xiao
• Huo, Peihao
• Jin, Qionghua
• Liu, Zhiwei
• Bian, Zuqiang
• Huang, Chunhui

Titel

Two‐Coordinate Copper(I)/NHC Complexes: Dual Emission Properties and Ultralong Room‐Temperature Phosphorescence

Ist Teil von

• Angewandte Chemie International Edition, 2020-05, Vol.59 (21), p.8210-8217

Auflage

International ed. in English

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• As a kind of photoluminescent material, CuI complexes have many advantages such as adjustable emission, variable structures, and low cost, attracting attention in many fields. In this work, two novel two‐coordinate CuI‐N‐heterocyclic carbene complexes were synthesized, and they exhibit unique dual emission properties, fluorescence and phosphorescence. The crystal structure, packing mode, and photophysical properties under different conditions were systematically studied, proving the emissive mechanism to be the locally excited state of the carbazole group. Based on this mechanism, ultralong room‐temperature phosphorescence (RTP) with a lifetime of 140 ms is achieved by selective deuteration of the carbazole group. These results deepen the understanding of the luminescence mechanism and design strategy for two‐coordinate CuI complexes, and prove their potential in applications as ultralong RTP materials. Two CuI‐N‐heterocyclic carbene complexes were designed and they demonstrated dual emission properties. A series of spectral, crystal, and theoretical studies proved the novel luminescence nature of the locally excited state in the complexes. Ultralong room‐temperature phosphorescence emission of 140 ms and a total photoluminescence quantum yield of 36.3 % were achieved by selective deuteration of the carbazole group.