Ruthenium (II) polypyridyl complexes based on bipyridine and two novel diimine ligands with carrier-transporting unit: synthesis, photoluminescence and redox properties

Wu, Jing; Li, Hongyan; Kang, Lu; Li, Dong-Ping; Xu, Qiu‐Lei; Zhu, Yucheng; Tao, Yun-Mei; Zheng, You‐Xuan; Zuo, Jing‐Lin; You, Xiao‐Zeng

doi:10.1016/j.jorganchem.2010.04.037

Cited by 9 publications

(1 citation statement)

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“…Improvement of absorbance and luminescence intensities of the samples by the presence of carbazole is due to the broad and strong absorption bands of carbazole from 220 to 350 nm, in favor of energy absorption and energy transfer from carbazole units to dipyrido[3,2-a:2′,3′-c]phenazine. Similar results were found in similar carbazole containing rhenium and ruthenium complexes [10,27,34,35]. These results confirm that antenna substitutes can increase the light harvesting efficiency of Re(I) complexes.…”

Section: Optical Propertysupporting

confidence: 85%

Syntheses and photoluminescence properties of rhenium(I) complexes based on dipyrido[3,2-a:2′,3′-c]phenazine derivatives with carbazole moiety

Zhou

Wang

Chen

et al. 2013

Journal of Coordination Chemistry

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2013) Syntheses and photoluminescence properties of rhenium(I) complexes based on dipyrido[3,2-a:2′,3′-c]phenazine derivatives with carbazole moiety, Journal of Coordination Chemistry, 66:6, 958-965, Four rhenium(I) complexes ReL1-ReL4 based on dipyrido[3,2-a:2′,3′-c]phenazine (L1) and derivatives L2-L4 ligands (L2: 10,13-dibromodipyrido[3,2-a:2′,3′-c]phenazine, L3: 10-bromo-13-carbazolyl-dipyrido[3,2-a:2′,3′-c]phenazine, L4: 10,13-dicarbazolyldipyrido[3,2-a:2′,3′-c]phenazine)were synthesized and characterized. The Re(I) complexes ReL1-ReL4 show photoluminescent emissions at 556, 582, 637 and 662 nm, respectively, assigned to dp (Re)→p ⁄ (diimine) MLCT phosphorescence in CH 2 Cl 2 solution. The carbazole containing complexes ReL3 and ReL4, as compared to ReL1, exhibit higher luminescence. These observations imply that modification of diimine rhenium(I) carbonyl complexes with carbazole moiety would lead to efficient phosphorescent properties. IntroductionOrganic light emitting diodes (OLEDs) based on transition metal complexes [1][2][3][4][5] have received considerable attention for high-emission quantum efficiency and rich excited-state behavior. Rhenium complexes [6-11] often exhibit extraordinary luminescent properties and play an important role in the photophysics and photochemistry of transition metal complexes. In particular, the rhenium(I) tricarbonyl complexes fac-Re(CO) 3 (L)X, where L is a bidentate diimine ligand and X is a halogen, have been studied and applied in various areas such as electroluminescent materials in OLED devices [12], solar energy conversion [13] and photocatalytic CO 2 reduction [14,15].However, performances of Re(I) complex-based OLEDs are far from practical application in electroluminescence because of serious triplet-triplet annihilation (TTA) of

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Section: Optical Propertysupporting

confidence: 85%