Strong Circularly‐Polarized Room‐Temperature Phosphorescence from a Feasibly Separable Scaffold of Bidibenzo[<i>b</i>,<i>d</i>]furan with Locked Axial Chirality

Huang, Wenbin; Fu, Chunya; Liang, Zhiwei; Zhou, Kang; He, Zikai

doi:10.1002/ange.202202977

Cited by 7 publications

(6 citation statements)

References 53 publications

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“…7 Over the last few years, some organic molecules exhibiting long-lived CPP at room temperature have been reported. 18,[31][32][33][34][35][36][37][38] However, small molecules that emit long-lived CPP from a single-molecule state are still rare. To the best of our knowledge, this is the first example of a purely organic (not coordinating to metal ions) helicene that exhibits long-lived CPP from a non-aggregated state at room temperature.…”

Section: 〈S 𝑚 |𝐻 Soc |T 𝑛 〉mentioning

confidence: 99%

A double heterohelicene composed of two benzo[b]phenothiazine exhibiting intense room-temperature circularly polarized phosphorescence

Tanaka¹,

Sakamaki²,

Haruta

et al. 2023

J. Mater. Chem. C

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Section: 〈S 𝑚 |𝐻 Soc |T 𝑛 〉mentioning

confidence: 99%

A double heterohelicene composed of two benzo[b]phenothiazine exhibiting intense room-temperature circularly polarized phosphorescence

Tanaka¹,

Sakamaki²,

Haruta

et al. 2023

J. Mater. Chem. C

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“…Recently, another example from He et al further illustrate these aspects, through the design of a novel bidibenzo[ b , d ]furan enantiomer R‐ 1 displaying particularly impressive chiroptical properties once doped in poly (vinyl alcohol) (PVA) films (Figure 8). 78 Initially, R‐ 1 was obtained following NHC‐catalyzed kinetic resolution while subsequent ethereal bridging of the opened ( R )‐diol analog allows further locking of the biaryl skeleton, limiting thereby the racemization of the compound. Both the solution and crystal of R‐ 1 exhibit similar PL spectra at RT.…”

Section: Rtp Of Axially Chiral Bicarbazoles and Bisbenzo[bd]furan Der...mentioning

confidence: 99%

Recent advances in room temperature phosphorescence of chiral organic materials

2023

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Room temperature phosphorescence (RTP) in purely organic materials is an uncommon phenomenon of emission, which can be characterized by a long persistent luminescence after removal of the excitation source. In the recent years, RTP organic materials have received a considerable attention due to their high application potential in various advancing technologies, ranging from optoelectronic to biomedical applications. In parallel, many progresses have been achieved on the rationalization of this process and led to the emergence of innovative strategies aiming to achieve highest performances both in terms of phosphorescence efficiency and lifetime. While the topic is still on an ascendant development, the generation of circularly polarized phosphorescent (CPP) emission from purely organic molecules is by far much less explored and remains an impressive challenge. Still, the perspective of CPP materials appears as an interesting opportunity to answer several comprehensives issues existing in the field. In this article, we define, in a straightforward way, basic principles and key notions for the generation of RTP and CP luminescence (CPL) guiding the design toward CPP materials. After this brief insight, recent advances in the field of chiral organic RTP materials are discussed with an emphasis on their CP-RTP properties. Based on this development, the conclusion drawn allows establishing the next challenges and future opportunities standing in the field.

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“…In addition, circularly polarized phosphorescence (CPP) can also be obtained by doping RTP molecules with chiral groups into a polymer matrix. He's group 47 reported a novel chiral molecule in the R configuration ( molecule 80 , Scheme 3) and doped it into a PVA matrix; efficient (14.8%) and persistent (0.56 s) room‐temperature CPP was achieved with the highest dissymmetry factor of 0.12. The PVA matrix efficiently reduces the nonradiative decay and significantly boosts the intrinsic polarized RTP emission.…”

Section: Construction Of Rtp Materials In Amorphous Statesmentioning

confidence: 99%

Room‐temperature phosphorescence materials from crystalline to amorphous state

Shi

et al. 2022

SmartMat

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Room temperature phosphorescence (RTP) in metal‐free organic materials has attracted considerable attention due to its rich excited state properties, high quantum efficiency, long luminescence lifetimes, etc., showing great potential in organic optoelectronic devices, bioimaging, information anti‐counterfeiting, and so forth. The crystals have excellent rigidity and clear molecular packing patterns, which can effectively avoid non‐radiative transitions of excitons for phosphorescence enhancement. In the early stages, researchers paid great attention to the regulation of RTP performance in crystalline states. However, due to the complex preparation and poor processability of crystals, amorphous materials with RTP features have become a new research topic recently. This perspective aims to summarize the recent advances of RTP materials from crystalline to amorphous states, and analyze their molecular design strategies and luminescence mechanisms in detail. Finally, we prospect the future research directions of amorphous RTP materials. This perspective will provide a guideline for the future study of advanced RTP materials.

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Strong Circularly‐Polarized Room‐Temperature Phosphorescence from a Feasibly Separable Scaffold of Bidibenzo[b,d]furan with Locked Axial Chirality

Cited by 7 publications

References 53 publications

A double heterohelicene composed of two benzo[b]phenothiazine exhibiting intense room-temperature circularly polarized phosphorescence

A double heterohelicene composed of two benzo[b]phenothiazine exhibiting intense room-temperature circularly polarized phosphorescence

Recent advances in room temperature phosphorescence of chiral organic materials

Room‐temperature phosphorescence materials from crystalline to amorphous state

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