Zhu, Ze-Lin; Chen, Wen-Cheng; Ni, Shao-Fei; Yan, Jie; Wang, Sheng Fu; Fu, Li-Wen; Tsai, Han-Yan; Chi, Yun; Lee, Chun-Sing published their research in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices in 2021. The article was titled 《Constructing deep-blue bis-tridentate Ir(III) phosphors with fluorene-based dianionic chelates》.Electric Literature of C5H3Br2N The article contains the following contents:
High efficiency and stable blue phosphors have been a persistent pursuit in the field of organic light-emitting diodes (OLEDs). Bis-tridentate Ir(III) complexes are considered as promising alternatives because of their excellent emission efficiency and good photostability. However, the emission colors of photostable bis-tridentate Ir(III) emitters reported so far do not reach the deep blue region. Herein, fluorene is introduced in the design of blue bis-tridentate Ir(III) complexes. By modifying a fluorene-based dianionic chelate with tert-Bu, methoxy, pyrrolidinyl and triazolyl appendages, five blue emitting bis-tridentate Ir(III) phosphors were successfully designed and prepared Emissions of the new phosphors exhibited a gradual blue shift from the sky blue to the deep blue region according to the electron donating abilities of the added substituents. A deep blue OLED was successfully fabricated based on Flu-4 and presented an excellent maximum external quantum efficiency of 22.3% with CIE coordinates of (0.17, 0.19), which are comparable to the state-of-the-art deep blue phosphors. In the experiment, the researchers used 2,6-Dibromopyridine(cas: 626-05-1Electric Literature of C5H3Br2N)
2,6-Dibromopyridine(cas: 626-05-1) belongs to pyridine. Pyridines are often used as catalysts or reagents; particular notice has been paid recently to how pyridine coordinates to metal centers enabling a wide range of valuable reactions. Electric Literature of C5H3Br2N