Results 91 to 100 of about 3,749 (233)

N‐Aryl Acridone Derivatives as Effective Catalysts for Energy Transfer Reactions

Chemistry – A European Journal, EarlyView.
Acridones derivatives have high triplet energy, are simple accessible, and could be used in challenging [2+2] ENT reactions. ABSTRACT Organic photocatalysts capable of promoting high‐energy triplet energy transfer (EnT) remain limited, particularly for demanding [2+2] photocycloaddition reactions.
Francesco Calogero, Gaetano D'Onghia, Federica Fina, Zakaria Ziani, Luca Sensoli, Andrea Gualandi, Andrea Fermi, Paola Ceroni, Pier Giorgio Cozzi   +8 more
wiley   +1 more source

Constructing Narrowband Thermally Activated Delayed Fluorescence Materials with Emission Maxima Beyond 560 nm Based on Frontier Molecular Orbital Engineering

, 2021
The development of purely organic materials with narrowband emission in long wavelength region beyond 560 nm still remains a great challenge. Herein, we present a modification approach of multiple resonance (MR) skeleton with electron donor based on ...
Xinliang, Cai, Qingyang, Wang, Yincai, Xu, Chenglong, Li, Yue, Wang   +4 more
core   +1 more source

Synthesis and Optical Properties of Diboron Complexes of 1,4‐Anthraquinone Derivatives

Chemistry – A European Journal, EarlyView.
1,4‐Diboron complexes exhibit near‐infrared fluorescence, in contrast to non‐emissive 1,5‐diboron analogues. Fluorescence quantum yields decrease with increasing electron‐donating substituents, attributed to enhanced nonradiative decay via intramolecular PeT.
Yasuhiro Kubota, Ayumi Ogasawara, Ayato Hakamada, Naoya Suzuki, Masayasu Taki, Shota Mizuno, Toshiyasu Inuzuka, Kazumasa Funabiki, Chie Yamada‐Kubota, Miho Kuwahara, Tetsuya Hara   +10 more
wiley   +1 more source

The combination of a donor-acceptor thermally activated delayed fluorescence moiety (TADF) and a multiresonant (MR-TADF) emitting core results in outstanding electroluminescence performance

Here we demonstrate the utility and potential of an emitter design consisting of a narrowband-emitting multiresonant thermally activated delayed fluorescent (MR-TADF) core that is decorated by a suitably higher energy donor-acceptor TADF moiety. Not only
Kai, Wang, Dongyang, Chen, Eli, Zysman-Colman, Hui, Wang, Dianming, Sun, Xiaohong, Zhang, Sen, Wu   +6 more
core   +1 more source

Comparison of the Performance of Fluorescent, Phosphorescent, and TADF Luminophores for Explosives Sensing

Advanced Sensor Research
This study investigates how the emission mechanism (fluorescence, phosphorescence, or thermally activated delayed fluorescence, TADF) of a luminescence‐quenching chemical sensor influences the sensitivity of explosives detection.
Michele Duarte Tonet, Graham A. Turnbull, Eli Zysman‐Colman   +2 more
doaj   +1 more source

Understanding luminescence of metal-containing thermally activated delayed fluorescence (TADF) luminophores

Inorganic Chemistry Frontiers
We present a critical review of metal TADF luminophores highlighting a balance between TADF and phosphorescence in these systems.
Lubna Salah, Paulina Marek-Urban, Mieczysław Łapkowski, Fernando B. Dias, Piotr Pander   +4 more
openaire   +1 more source

Asymmetric Diphosphane Dioxides With A–π–A–π’–D Scaffolds for High‐Purity Deep‐Blue Luminescence

Chemistry – A European Journal, EarlyView.
Diphosphane dioxide‐based luminophores with donor–π–acceptor– π’–acceptor scaffold enable efficient deep‐blue emission from tunable charge‐transfer states affording high photoluminescence up to 95%. OLEDs reach EQE 4.9%, aided by triplet–triplet annihilation, highlighting a practical route to high‐performance blue emitters.
Eetu Hakkarainen, Zong‐Ying Liu, Jhon Sebastian Oviedo Ortiz, Nicolas Vanthuyne, Jeanne Crassous, Ondřej Mrózek, Fabien B. L. Cougnon, Wen‐Yi Hung, Pi‐Tai Chou, Igor O. Koshevoy, Andrey Belyaev   +10 more
wiley   +1 more source

Matrix‐Free Afterglow Carbon Dots: Synthetic Strategies, Luminescence Mechanisms, and Emerging Applications

Carbon Innovation, EarlyView.
This review systematically elucidates the luminescence mechanism, synthesis methods of matrix‐free afterglow carbon dots, and their application progress in information encryption, light‐emitting diodes, sensing, bioimaging, and tumor treatment, and finally, discusses the current challenges and future development directions. ABSTRACT Afterglow materials,
Yupeng Liu, Xiangxin Sun, Zhiqi Cai, Hanyi Zhang, Yiming Hao, Songnan Qu   +5 more
wiley   +1 more source

Shedding light on thermally-activated delayed fluorescence

Thermally activated delayed fluorescence (TADF) is a hot research topic in view of its impressive applications in a wide variety of fields from organic LEDs to photodynamic therapy or metal-free photocathalysis. TADF is a rare and fragile phenomenon that
Anna, Painelli, Ottavia, Racchi, Francesco, Di Maiolo, Andrea, Landi, DK Andrea, Phan Huu, Davide, Giavazzi   +5 more
core   +1 more source

Modulation of delayed fluorescence pathways via rational molecular engineering

Nature Communications
One of the key challenges in developing efficient organic light-emitting diodes (OLEDs) is overcoming the loss channel of triplet excitons. A common approach to mitigate these losses to enhance the external quantum efficiency of OLEDs is employing ...
Sanchari Debnath, Pria Ramkissoon, Ulrike Salzner, Christopher R. Hall, Naitik A. Panjwani, Woojae Kim, Trevor A. Smith, Satish Patil   +7 more
doaj   +1 more source