scholarly journals Homoconjugation enhances the photophysical and electrochemical properties of a new 3D intramolecular charge transfer iptycene displaying deep blue emission

2019 ◽  
Vol 7 (41) ◽  
pp. 12886-12890 ◽  
Author(s):  
Stephanie Montanaro ◽  
Daniel G. Congrave ◽  
Marc K. Etherington ◽  
Iain A. Wright
Keyword(s):  
Charge Transfer ◽  
Electrochemical Properties ◽  
Intramolecular Charge Transfer ◽  
Blue Emission ◽  
Optoelectronic Properties ◽  
Deep Blue

Greater than the sum of its parts – a 3D ICT molecule displays greatly improved optoelectronic properties over a 2D analogue.

Synthesis and optical and electrochemical properties of water-soluble cationic fluorophores based on bispyridinium and dibenzothiophene-S,S-dioxide

2017 ◽  
Vol 41 (4) ◽  
pp. 1696-1703 ◽  
Author(s):  
Guiting Chen ◽  
Ruifeng He ◽  
Wei Yang ◽  
Bin Zhang
Keyword(s):  
Electrochemical Properties ◽  
Blue Emission ◽  
Water Soluble ◽  
Quantum Yields ◽  
Deep Blue

Two water-soluble cationic fluorophores (FSOPyCl and FSOmiCl) based on bispyridinium and dibenzothiophene-S,S-dioxide show deep blue emission, and exhibit high photoluminescence quantum yields of 69% and 50% in water, respectively.

scholarly journals Conjugation and optoelectronic properties of acetylenic scaffolds and charge-transfer chromophores

2008 ◽  
Vol 80 (3) ◽  
pp. 411-427 ◽  
Author(s):  
Milan Kivala ◽  
François Diederich
Keyword(s):  
Charge Transfer ◽  
Storage Capacity ◽  
Intramolecular Charge Transfer ◽  
Research Effort ◽  
Repetitive Sequences ◽  
Molecular Switches ◽  
Optoelectronic Properties ◽  
Three Dimensions ◽  
Donor Acceptor ◽  
And Storage

Our group started a research program in acetylene chemistry in 1987; since then, an intense research effort led to a fascinating journey into acetylenic scaffolding, aimed at exploring conjugative and optoelectronic properties of acetylenic chromophores. This journey included the generation of a unique molecular construction kit for acetylenic scaffolding, consisting of (E)-1,2-diethynylethenes [DEEs, (E)-hex-3-ene-1,5-diynes], tetraethynylethenes (TEEs, 3,4-diethynylhex-3-ene-1,5-diynes), chiral 1,3-diethynylallenes (DEAs, hepta-3,4-diene-1,6-diynes), 1,4-di and 1,1,4,4-tetraethynylbutatrienes, chiral trialkynylmethanes, and 1,1,2,2-tetraethynylethanes. These building modules were subsequently applied to the synthesis of carbon-rich architectures extending into one, two, and three dimensions. They include multinanometer-long monodisperse oligomers as models for infinite acetylenic polymers, molecular switches, perethynylated dehydroannulenes, expanded radialenes, and radiaannulenes, and an octamethoxy-substituted expanded cubane with a central C56 core. Donor-substituted cyanoethynylethenes (CEEs) and 1,1,4,4-tetracyanobuta-1,3-dienes (TCBDs) were introduced as new push-pull chromophores featuring intense intramolecular charge-transfer (CT) interactions. Dendritic multivalent CT chromophores were constructed using atom-economic, "click"-like reactions, and these systems were shown to behave as "molecular batteries", featuring exceptional electron uptake and storage capacity. The research finally led to the development of an unprecedented cascade reaction for the preparation of dendritic and oligomeric donor-acceptor (D-A) molecules. New [AB]-type oligomers become accessible in domino reactions involving repetitive sequences of [2+2] cycloadditions of tetracyanoethylene (TCNE) and tetrathiafulvalene (TTF) to polyynes, followed by retro-electrocyclizations.

scholarly journals Benzimidazole-Based N,O Boron Complexes as Deep Blue Solid-State Fluorophores

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4298
Author(s):  
Patrícia A. A. M. Vaz ◽  
João Rocha ◽  
Artur M. S. Silva ◽  
Samuel Guieu
Keyword(s):  
Excited State ◽  
Solid State ◽  
Proton Transfer ◽  
Blue Emission ◽  
Intramolecular Proton Transfer ◽  
Optoelectronic Properties ◽  
Deep Blue ◽  
Boron Complexes ◽  
Cie Coordinates

Benzimidazole-based boranils were designed and synthesized in order to assess the influence of halogen substituents on their optoelectronic properties. All compounds are photoluminescent in solution and solid state. Compared to the free ligands, the new boranils emit at a lower wavelength, by elimination of the excited-state intramolecular proton transfer observed with the ligands. In the solid state, some of the boranils exhibit a deep blue emission, presenting Commission Internationale de l’Éclairage (CIE) coordinates with an x-component of less than 0.16 and a y-component smaller than 0.04, highly desired values for the development of blue emitting materials.

Deep-blue fluorescent emitter based on a 9,9-dioctylfluorene bridge with a hybridized local and charge-transfer excited state for organic light-emitting devices with EQE exceeding 8%

2020 ◽  
Vol 8 (40) ◽  
pp. 14117-14124
Author(s):  
Xing Liu ◽  
Wen Liu ◽  
Wu Dongyu ◽  
Xiaozhen Wei ◽  
Long Wang ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Blue Emission ◽  
Emission Peak ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Deep Blue ◽  
Organic Light

The doped device of TPA-DFCP exhibits excellent deep-blue emission with the EL emission peak at 436 nm and the CIE coordinates at (0.153, 0.077), and excellent EL performance with a maximum external quantum efficiency (EQE) of 8.30%.

Tuning the Intramolecular Charge Transfer Emission from Deep Blue to Green in Ambipolar Systems Based on DibenzothiopheneS,S-Dioxide by Manipulation of Conjugation and Strength of the Electron Donor Units

2010 ◽  
Vol 75 (20) ◽  
pp. 6771-6781 ◽  
Author(s):  
Kathryn C. Moss ◽  
Konstantinos N. Bourdakos ◽  
Vandana Bhalla ◽  
Kiran T. Kamtekar ◽  
Martin R. Bryce ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Electron Donor ◽  
Intramolecular Charge Transfer ◽  
Deep Blue

scholarly journals Understanding Optoelectronic Properties of Cyano-Terminated Oligothiophenes in the Context of Intramolecular Charge Transfer

2011 ◽  
Vol 115 (36) ◽  
pp. 10573-10585 ◽  
Author(s):  
Sandra Rodríguez González ◽  
Jesús Orduna ◽  
Raquel Alicante ◽  
Belén Villacampa ◽  
Kari A. McGee ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Intramolecular Charge Transfer ◽  
Optoelectronic Properties

Planarized B,N-phenylated dibenzoazaborine with a carbazole substructure: electronic impact of the structural constraint

2019 ◽  
Vol 17 (22) ◽  
pp. 5500-5504 ◽  
Author(s):  
Mikinori Ando ◽  
Mika Sakai ◽  
Naoki Ando ◽  
Masato Hirai ◽  
Shigehiro Yamaguchi
Keyword(s):  
Electrochemical Properties ◽  
Blue Emission ◽  
Structural Constraint ◽  
Electronic Impact ◽  
Deep Blue

Structural constraint in B,N-phenylated dibenzoazaborine alters the π-conjugation mode and furnishes intense deep-blue emission and intriguing electrochemical properties.

Sign in / Sign up

Export Citation Format

Share Document