226946-20-9Relevant articles and documents
A novel dibenzosuberenone bridged D-A-π-A type dye: Photophysical and photovoltaic investigations
Erdo?an, Musa
, (2021)
In this study, a novel dibenzosuberenone based organic dye comprising triphenylamine (TPA) as the electron-rich unit and a dibenzosuberenone as the central core and an additional acceptor and, benzene as the π linker unit, and an aldehyde as the electron-
Electron delocalization in vinyl ruthenium substituted cyclophanes: Assessment of the through-space and the through-bond pathways
Mücke, Philipp,Zabel, Manfred,Edge, Ruth,Collison, David,Clément, Sébastien,Záli?, Stanislav,Winter, Rainer F.
, p. 3186 - 3197 (2011)
Pseudo-para[2.2]paracyclophane- and [2.1]orthocyclophane-bridged diruthenium complexes 2 and 3 with two interlinked electroactive styryl ruthenium moieties have been prepared and investigated. Both complexes undergo two reversible consecutive one-electron oxidation processes which are separated by 270 or 105 mV. Stepwise electrolysis of the neutral complexes to first the mixed-valent radical cations and then the dioxidized dications under IR monitoring reveal incremental shifts of the charge-sensitive Ru(CO) bands and allow for an assignment of their radical cations as moderately or very weakly coupled mixed-valent systems of class II according to Robin and Day. Ground-state delocalization in the mixed-valent forms of these complexes as based on the CO band shifts is considerably larger for the "closed" paracyclophane as for the "half-open" orthocyclophane. Experimental findings are backed by the calculated IR band patterns and spin density distributions for radical cations of slightly simplified model complexes 2 Me+ and 3Me+ with the PiPr3 ligands replaced by PMe3. Radical cations 2+ and 3+ feature a characteristic NIR band that is neither present in their neutral or fully oxidized forms nor in the radical cation of the monoruthenium [2.2]paracyclophane complex 1 with just one vinyl ruthenium moiety. These bands are thus assigned as intervalence charge-transfer (IVCT) transitions. Our results indicate that, for the radical cations, electronic coupling "through-space" via the stacked styrene decks is significantly more efficient than the "through-bond" pathway.
Synthesis and Characterization of Dibenzo[a,d]cyclohepten-5-one Derivatives for Light-Emitting Diodes
Wang, Liping,Wang, Limin,Huang, Jianyao,Yu, Gui
, p. 948 - 954 (2015)
Three novel dibenzo[a,d]cyclohepten-5-one derivatives containing hole-transporting groups were synthesized and characterized. These compounds exhibit good thermal stabilities. Single crystals of DBHO-TPA and DBHO-DPA were successfully grown from dichloromethane and their crystal structures were determined from X-ray diffraction data. Two molecules, DBHO-TPA and DBHO-DPA, have a nonplanar structure while seven-membered ring comprised in dibenzo[a,d]cyclohepten-5-one is not planar. Electrochemical properties of three compounds indicate that the different substituents on 3,7-positions of the dibenzo[a,d]cyclohepten-5-one derivatives have a small effect on the energy levels of the highest occupied molecular orbitals. The blue-green light-emitting diodes based on dibenzo[a,d]cyclohepten-5-one derivatives were fabricated. Three novel dibenzo[a,d]cyclohepten-5-one derivatives containing the hole-transporting groups were synthesized and characterized. Blue-green organic light-emitting diodes were fabricated based on these materials.
Synthesis of conjugated polymers containing dibac-derived triazole monomers
Chadwick, Ryan C.,Kardelis, Vladimir,Liogier, Sophie,Adronov, Alex
, p. 9593 - 9598 (2013)
2,7-Dibromoazadibenzocyclooctyne (DIBAC-Br2) was prepared as a pro-monomer unit that could be modified by the metal-free strain-promoted azide-alkyne cycloaddition (SPAAC). Click cyclization of DIBAC-Br2 with five different benzyl azides produced a homologous series of monomers with different functionality on the resulting triazole ring, ranging from electron-withdrawing to electron-donating substituents. Using this series of monomers, in combination with 2,7-dialkylfluorene as a comonomer, five different conjugated polymers were prepared via Suzuki polycondensation, each having different electronic properties. The resulting copolymers exhibited M w values ranging from 5 to 10 kDa and PDI values in the 1.5-2 range. These polymers were characterized by 1H NMR spectroscopy, optical spectroscopy, and cyclic voltammetry. Finally, a coumarin-containing oligomer was synthesized and used to demonstrate a photo-cross-linking scheme via [2 + 2] cycloaddition.
Responsive organoboranes with dynamic conformation of octacyclophane-type scaffolds: synthesis, AIE and temperature-dependent dual emissions
Chen, Pangkuan,Ji, Guangqian,Li, Quansong,Wang, Nan,Yin, Xiaodong,Zhang, Kai,Zhang, Niu
, p. 13851 - 13859 (2021/10/20)
In the field of synthetic organic materials, there is still an urgent demand for new smart materials that show great potential in diverse applications. We herein describe a design strategy for the synthesis of luminescent organoboranes (M1,M2andM3) that f
Fluorene derivatives and organic light-emitting diode including the same
-
Paragraph 0117-0122, (2019/08/28)
PURPOSE: A fluorene derivative is provided provide an organic electroluminescent device with thermal stability, low driving voltage, luminance, etc, by having excellent luminous ability in comparison with existing material. CONSTITUTION: A fluorene deriva
Doubly ortho-linked cis-4,4′-bis(diarylamino)stilbene/fluorene hybrids as efficient nondoped, sky-blue fluorescent materials for optoelectronic applications
Wei, Yi,Chen, Chien-Tien
, p. 7478 - 7479 (2008/02/05)
The titled hybrids bearing a central dibenzosuberene optoelectronic unit with functional C3 and C7, N,N-diarylamino appendages, and spiro-fluorene junction act as blue fluorescent OLED materials. Sharp blue fluorescent (464 nm, Δλfwhm = 47-60 n
