302554-81-0Relevant articles and documents
Conjugated diene monomer 9-9 - dialkyl fluorene as structural unit and synthesis method thereof
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, (2021/10/05)
The invention relates to a conjugated diene monomer 9-9 - dialkyl fluorene as a structural unit and a synthesis method thereof, and belongs to the technical field of organic synthesis. 9, 9 - Dialkyl fluorene is the structural unit of the conjugated diene monomer. Herein R is a linear or branched alkyl group having a different number (6 - 30) of carbon atoms, n Shows functional groups of each intermediate, and a functional ethylenic monomer with Suzuki and 9 dialkyl fluorene as a core with different conjugation lengths can be obtained by repeating the bromination and acetylation reduction of the fluorene or 9 - fluorene oligomer. The problem of flexible expansion of chemical reaction of organic small molecules of fluorene units can be solved.
Bipolar small-molecule luminescent material adopting aromatic heterocyclicindenofluorene unit as core as well as preparation method and application of bipolar small-molecule luminescent material
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, (2017/08/19)
The invention discloses a bipolar small-molecule luminescent materialadopting an aromatic heterocyclicindenofluorene unit as a core as well as a preparation method and an application of the bipolar small-molecule luminescent material. The bipolar small-molecule luminescent material adopting the aromatic heterocyclicindenofluorene unit as the core is prepared through a Suzuki polymerization reaction, the synthetic method is simple, purification is easy, and industrial application is facilitated. The bipolar small-molecule luminescent material adopting the aromatic heterocyclicindenofluorene unit as the core is better in aromatic heterocyclicindenofluorene planarity and has higher fluorescence quantum yield; meanwhile, the bipolar small-molecule luminescent material adopting the aromatic heterocyclicindenofluorene unit as the core has good solubility, film-forming property and film morphology stability, is suitable for solution processing and printing display and is used for preparation of a luminescent layer of an organic light emitting diode, and annealing treatment is not needed when the luminescent layer based on the bipolar small-molecule luminescent material is used for preparing a device, so that the preparation process is simple.
Benzobisoxazole cruciforms: A tunable, cross-conjugated platform for the generation of deep blue OLED materials
Chavez, Ramiro,Cai, Min,Tlach, Brian,Wheeler, David L.,Kaudal, Rajiv,Tsyrenova, Ayuna,Tomlinson, Aimée L.,Shinar, Ruth,Shinar, Joseph,Jeffries-El, Malika
, p. 3765 - 3773 (2016/05/24)
Four new cross-conjugated small molecules based on a central benzo[1,2-d:4,5-d′]bisoxazole moiety possessing semi-independently tunable HOMO and LUMO levels were synthesized and the properties of these materials were evaluated experimentally and theoretically. The molecules were thermally stable with 5% weight loss occurring well above 350 °C. The cruciforms all exhibited blue emission in solution ranging from 433-450 nm. Host-guest OLEDs fabricated from various concentrations of these materials using the small molecule host 4,4′-bis(9-carbazolyl)-biphenyl (CBP) exhibited deep blue-emission with Commission Internationale de L'Eclairage (CIE) coordinates of (0.15 ≤ x ≤ 0.17, 0.05 ≤ y ≤ 0.11), and maximum luminance efficiencies as high as ～2 cd A-1. These results demonstrate the potential of benzobisoxazole cruciforms as emitters for developing high-performance deep blue OLEDs.
