Shifting TADF of phenyl-s-triazine derivatives to deep-blue: the approaches increasing triplet and singlet excited state energies (Conference Presentation)

2019 ◽  
Author(s):  
Illia Serdiuk ◽  
Chi Hyun Ryoo ◽  
Karol Kozakiewicz ◽  
Beata Liberek ◽  
Ji Eon Kwon ◽  
...  
Keyword(s):  
Excited State ◽  
Singlet Excited State ◽  
Deep Blue ◽  
Triazine Derivatives

Twisted acceptors in the design of deep-blue TADF emitters: crucial role of excited-state relaxation in the photophysics of methyl-substituted s-triphenyltriazine derivatives

2020 ◽  
Vol 8 (18) ◽  
pp. 6052-6062
Author(s):  
Illia E. Serdiuk ◽  
Chi Hyun Ryoo ◽  
Karol Kozakiewicz ◽  
Michał Mońka ◽  
Beata Liberek ◽  
...  
Keyword(s):  
Excited State ◽  
Structural Relaxation ◽  
Crucial Role ◽  
High Impact ◽  
Deep Blue ◽  
Triazine Derivatives

A series of twisted triaryl-s-triazine derivatives are used as acceptor fragments in design of deep-blue TADF emitters for OLED. Comprehensive photophysical investigations indicate high impact of structural relaxation on the TADF color and efficiency.

Novel Carbazole-based Multifunctional Materials with Hybridized Local and Charge-Transfer Excited State Acting as Deep Blue Emitters and Phosphorescent Hosts for Highly Efficient Organic Light-Emitting Diodes

2021 ◽  
Author(s):  
Haitao Zhou ◽  
Mengna Yin ◽  
Zhenhong Zhao ◽  
Yanqin Miao ◽  
Xin Jin ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Multifunctional Materials ◽  
Light Emitting ◽  
Highly Efficient ◽  
Deep Blue ◽  
Organic Light ◽  
Blue Emitters

In this work, two carbazole- and benzo[d]oxazole-based novel multifunctional materials with hybridized local and charge-transfer (HLCT) characteristic, namely OCI and OCT, which could act as deep-blue fluorophors and phosphorescent hosts,...

Amino derivatives of symmetric 1,3,5-triphenylbenzene. Nature of the polar singlet excited state.

1993 ◽  
Vol 176 (1) ◽  
pp. 195-213 ◽  
Author(s):  
G. Verbeek ◽  
S. Depaemelaere ◽  
M. Van der Auweraer ◽  
F.C. De Schryver ◽  
A. Vaes ◽  
...  
Keyword(s):  
Excited State ◽  
Singlet Excited State ◽  
Amino Derivatives ◽  
Derivatives Of

Thionine–graphene oxide covalent hybrid and its interaction with light

2017 ◽  
Vol 19 (22) ◽  
pp. 14412-14423 ◽  
Author(s):  
Ewelina Krzyszkowska ◽  
Justyna Walkowiak-Kulikowska ◽  
Sven Stienen ◽  
Aleksandra Wojcik
Keyword(s):  
Electron Transfer ◽  
Graphene Oxide ◽  
Excited State ◽  
Transfer Process ◽  
Singlet Excited State ◽  
Functionalized Graphene ◽  
Electron Transfer Process ◽  
Functionalized Graphene Oxide ◽  
Back Electron Transfer

Quenching of the thionine singlet excited state in covalently functionalized graphene oxide with an efficient back electron transfer process.

The photocycloaddition of dibenzoylmethanatoboron difluoride (DBMBF2) with conjugated enones and en-esters

1993 ◽  
Vol 71 (6) ◽  
pp. 846-854 ◽  
Author(s):  
Yuan L. Chow ◽  
Shi-Sen Wang ◽  
Xian-En Cheng
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Ring Opening ◽  
Electron Donors ◽  
Head Orientation ◽  
Singlet Excited State ◽  
Methyl Substitution ◽  
Unsaturated Ketones ◽  
Dibenzoylmethanatoboron Difluoride

Dibenzoylmethanatoboron difluoride (DBMBF2), the BF2 complex of dibenzoylmethane, reacted from its singlet excited state with α,β-unsaturated ketones and esters to give 1,5-diketones by a [2+2] cycloaddition and ring-opening sequence in an analogous pathway to that observed in the photocycloaddition to olefins and dienes. The present photoreaction is unexpected since conjugated enones and en-esters are poor electron donors to comply with the previously proposed charge transfer requirement in DBMBF2 photoreactions. The photocycloaddition to these substrates was highly regioselective and stereoselective, giving the head-to-head orientation, which could be enhanced by α-methyl substitution; β-methyl substitution increased the alternate head-to-tail orientation. The photolysis of a mixture of DBMBF2 and a cyclic enone also caused the latter to dimerize to give head-to-head and head-to-tail dimers in significant yields. These photodimerizations were apparently caused by DBMBF2 sensitization. The mechanism of the sensitization is discussed.

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