330-91-6Relevant articles and documents
Electron Push-Pull Effects on Intramolecular Charge Transfer in Perylene-Based Donor-Acceptor Compounds
Ahn, Mina,Kim, Min-Ji,Cho, Dae Won,Wee, Kyung-Ryang
, p. 403 - 413 (2020/12/23)
A series of asymmetric donor-acceptor (D-A) perylene-based compounds, 3-(N,N-bis(4′-(R)-phenyl)amino)perylene (Peri-DPA(R)), were successfully prepared to explore their intramolecular charge transfer (ICT) properties. To induce ICT between the donor and acceptor, diphenylamine (DPA) derivatives (electron donor units) with the same functional groups (R = CN, F, H, Me, or OMe) at both para positions were linked to the C-3 position of perylene to produce five Peri-DPA derivatives. A steady-state spectroscopy study on Peri-DPA(R)s exhibited a progressively regulated ICT trend consistent with the substituent effect as it progressed from the electron-withdrawing group to the electron-donating group. In particular, a comparative study using a D-A-D (donor-acceptor-donor) system demonstrated that not only the electron push-pull substituent effect but also subunit combinations influence photophysical and electrochemical properties. The different ICT characters observed in Lippert-Mataga plots of D-A(CN) and D-A-D(CN) (CN-substituted D-A and D-A-D) led to the investigation on whether ICT emission of two systems with differences in subunit combinations is of the same type or of a different type. The femtosecond transient absorption (fs-TA) spectroscopic results provided direct evidence of ICT origin and confirmed that D-A(CN) and D-A-D(CN) exhibited the same transition mix of ICT (from donor to acceptor) and reverse ICT (rICT, from arylamine to CN unit). Density functional theory (DFT)/TD-DFT calculations support the presence of ICT for all five compounds, and the experimental observations of rICT presented only for CN-substituted compounds.
ORGANIC COMPOUNDS, LIGHT EMITTING DIODE AND LIGHT EMITTING DEVICE HAVING THE COMPOUNDS
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Paragraph 0214; 0219-0222, (2020/08/07)
The present invention relates to an organic compound having a condensed aromatic core with a fluorene moiety and substituted with one or more functional groups having excellent hole transport properties, and a light emitting diode and a light emitting device using the same. According to the present invention, the organic compound can be introduced into a light emitting diode by using a solution process, and has a very deep HOMO energy level. When the organic compound of the present invention is applied to a hole transport layer, a band gap of the HOMO energy level between the hole transport layer and a light emitting material layer can be reduced, and thus holes and electrons can be injected into the light emitting material layer in a balanced manner. Accordingly, the light emitting diode and the light emitting device capable of low-voltage driving with higher light emitting efficiency can be implemented.COPYRIGHT KIPO 2020
Tuning the Photophysical Properties of Symmetric Squarylium Dyes: Investigation on the Halogen Modulation Effects
Chen, Weiben,Zhang, Simeng,Dai, Gaole,Chen, Ying,Li, Miao,Zhao, Xiaoyu,Chen, Yulan,Chen, Long
supporting information, p. 469 - 473 (2019/01/04)
A series of symmetric squarylium dyes (SQDPA-X) with different halogen (X=F, Cl, Br, I) substituents have been developed. The photophysical properties could be facilely tuned by the halogen modulation effects. The strategy of incorporating different halogen substitutions into AIE active luminogens enables a facile approach for exploring new intriguing organic fluorescent dyes.