A Trimetallic Mixed Ru(II)/Fe(II) Terpyridyl Complex with A Long-Lived Excited State in Solution at Room Temperature

2004 ◽  
Vol 126 (50) ◽  
pp. 16304-16305 ◽  
Author(s):  
Sujoy Baitalik ◽  
Xian-yong Wang ◽  
Russell H. Schmehl
Keyword(s):  
Excited State ◽  
Room Temperature

scholarly journals Thermochromic aggregation-induced dual phosphorescence via temperature-dependent sp3-linked donor-acceptor electronic coupling

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Tao Wang ◽  
Zhubin Hu ◽  
Xiancheng Nie ◽  
Linkun Huang ◽  
Miao Hui ◽  
...  
Keyword(s):  
Excited State ◽  
Room Temperature ◽  
Electronic Coupling ◽  
Temperature Dependent ◽  
Molecular Systems ◽  
Donor And Acceptor ◽  
Theoretical Investigations ◽  
Donor Acceptor ◽  
And Control ◽  
Two Temperature

AbstractAggregation-induced emission (AIE) has proven to be a viable strategy to achieve highly efficient room temperature phosphorescence (RTP) in bulk by restricting molecular motions. Here, we show that by utilizing triphenylamine (TPA) as an electronic donor that connects to an acceptor via an sp3 linker, six TPA-based AIE-active RTP luminophores were obtained. Distinct dual phosphorescence bands emitting from largely localized donor and acceptor triplet emitting states could be recorded at lowered temperatures; at room temperature, only a merged RTP band is present. Theoretical investigations reveal that the two temperature-dependent phosphorescence bands both originate from local/global minima from the lowest triplet excited state (T1). The reported molecular construct serves as an intermediary case between a fully conjugated donor-acceptor system and a donor/acceptor binary mix, which may provide important clues on the design and control of high-freedom molecular systems with complex excited-state dynamics.

scholarly journals Ultra long‐lived triplet excited state in water at room temperature: Insights on the molecular design of tridecafullerenes

2021 ◽  
Author(s):  
Javier Ramos-Soriano ◽  
Alfonso Pérez-Sánchez ◽  
Sergio Ramírez-Barroso ◽  
Beatriz M. Illescas ◽  
Khalid Azmani ◽  
...  
Keyword(s):  
Excited State ◽  
Room Temperature ◽  
Molecular Design ◽  
Triplet Excited State

Chapter Open for the Excited-State Intramolecular Thiol Proton Transfer in the Room-Temperature Solution

2021 ◽  
Author(s):  
Chun-Hsiang Wang ◽  
Zong-Ying Liu ◽  
Chun-Hao Huang ◽  
Chao-Tsen Chen ◽  
Fan-Yi Meng ◽  
...  
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Room Temperature ◽  
Temperature Solution

scholarly journals Regioisomeric Effect on the Excited-State Fate Leading to Room-Temperature Phosphorescence or Thermally Activated Delayed Fluorescence in a Dibenzophenazine-Cored Donor–Acceptor–Donor System

2021 ◽  
Author(s):  
Takumi Hosono ◽  
Nicolas Oliveira Decarli ◽  
Paola Zimmermann Crocomo ◽  
Tsuyoshi Goya ◽  
Leonardo Evaristo de Sousa ◽  
...  
Keyword(s):  
Excited State ◽  
Room Temperature ◽  
Delayed Fluorescence ◽  
Quantum Yields ◽  
Room Temperature Phosphorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Donor Acceptor ◽  
Emission Behavior

Exploring design principle for switching thermally activated dealyed fluorescecne (TADF) and room temperature phosphorescence (RTP) is a fundamentally imporant research in developing triplet-mediated photofunctional organic materials. Herein systematic studies on the regioisomeric and substituents effects in a twisted donor–acceptor–donor (D–A–D) scaffold (A = dibenzo[a,j]phenazine; D = dihydrophenazasiline) on the fate of the excited state have been performed. The study revealed that the regiosiomerism clearly affects the emission behavior of the D–A–D compounds. Distinct difference in TADF, dual TADF & RTP, and dual RTP were observed, depending on the host used. Furthermore, OLED organic light-emitting diodes (OLEDs) fabricated with the developed emitters achieved high external quantum yields for RTP-based OLEDS up to 7.4%.

Ultrafast Measurements of Excited State Intramolecular Proton Transfer (ESIPT) in Room Temperature Solutions of 3-Hydroxyflavone and Derivatives

2001 ◽  
Vol 105 (15) ◽  
pp. 3709-3718 ◽  
Author(s):  
Simon Ameer-Beg ◽  
Stuart M. Ormson ◽  
Robert G. Brown ◽  
Pavel Matousek ◽  
Mike Towrie ◽  
...  
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Room Temperature ◽  
Intramolecular Proton Transfer ◽  
Ultrafast Measurements

scholarly journals Reactions of excited-state benzophenone ketyl radical in a room-temperature ionic liquid

2010 ◽  
Vol 12 (8) ◽  
pp. 1963 ◽  
Author(s):  
Kenji Takahashi ◽  
Hiroaki Tezuka ◽  
Shingo Kitamura ◽  
Toshifumi Satoh ◽  
Ryuzi Katoh
Keyword(s):  
Ionic Liquid ◽  
Excited State ◽  
Room Temperature ◽  
Room Temperature Ionic Liquid ◽  
Ketyl Radical

Versatile heteroleptic bis-terdentate Cr(iii) chromophores displaying room temperature millisecond excited state lifetimes

2018 ◽  
Vol 54 (94) ◽  
pp. 13228-13231 ◽  
Author(s):  
Juan-Ramón Jiménez ◽  
Benjamin Doistau ◽  
Céline Besnard ◽  
Claude Piguet
Keyword(s):  
Excited State ◽  
Room Temperature ◽  
Excited State Lifetimes

Cr–Br bonds can be specifically labilized for producing phosphorescent and tuneable heteroleptic bis-terdentate Cr(iii) long-lived sensitizers.

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