کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1327325 | 977475 | 2009 | 13 صفحه PDF | دانلود رایگان |
New pyrimidine derivatives (pyr) have been synthesized using palladium-catalyzed Suzuki coupling reaction. These compounds can undergo cyclometalation with iridium trichloride to form bis-cyclometalated iridium complexes, (pyr)2Ir(acac) (acac = acetylacetonate; pyr = cyclometalated pyr). The substituents at the both cyclometalated phenyl ring and pyrimidine ring were found to affect both electrochemical and photophysical properties of the complexes. Computation results on these complexes are consistent with the electrochemical and photophysical data. The complexes are green-emitting with good solution quantum yields at ∼0.30. Light-emitting devices using these complexes as dopants were fabricated, and the device performance at 100 mA/cm2 are moderate: 9 (17 481 cd/m2, 4.8%, 18 cd/A, 5.1 lm/W); 10 (18 704 cd/m2, 4.9%, 18.9 cd/A, 4.7 lm/W); 13 (20 942 cd/m2, 5.4%, 21.0 cd/A, 6.1 lm/W).
Cyclometalated iridium complexes based on pyrimidine derivatives have been synthesized. Green-emitting OLEDs were fabricated using these complexes as the dopants. Computations were also carried out for the complexes.Figure optionsDownload as PowerPoint slide
Journal: Journal of Organometallic Chemistry - Volume 694, Issue 17, 1 August 2009, Pages 2757–2769