Management of triplet excitons transition: fine regulation of Förster and dexter energy transfer simultaneously DOI Creative Commons
Jiaqiang Wang, Yujie Yang, Xinnan Sun

et al.

Light Science & Applications, Journal Year: 2024, Volume and Issue: 13(1)

Published: Jan. 30, 2024

Abstract Understanding and management of triplet excitons transition in the same molecule remain a great challenge. Hence, for first time, by host engineering, manageable transitions naphthalimide derivative NDOH were achieved, monitored through intensity ratio (I TADF /I RTP ) between thermally activated delayed fluorescence (TADF) room-temperature phosphorescence (RTP). Energy differences lowest excited states guest changed from 0.03 to 0.17 eV, I decreased 200 times, thus red shifting afterglow color. It was proposed that shorter conjugation length led larger band gaps materials, contributing efficient Dexter inefficient Förster energy transfer. Interestingly, no singlet state only strongest with quantum yield 13.9% could be observed, when PBNC loosest stacking largest gap acted as host. This work provides novel insight prediction exciton development smart materials.

Language: Английский

Long lifetimes white afterglow in slightly crosslinked polymer systems DOI Creative Commons

Qingao Chen,

Lunjun Qu,

Hui Hou

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: April 5, 2024

Abstract Intrinsic polymer room-temperature phosphorescence (IPRTP) materials have attracted considerable attention for application in flexible electronics, information encryption, lighting displays, and other fields due to their excellent processabilities luminescence properties. However, achieving multicolor long-lived luminescence, particularly white afterglow, undoped polymers is challenging. Herein, we propose a strategy of covalently coupling different conjugated chromophores with poly(acrylic acid (AA)-AA-N-succinimide ester) (PAA-NHS) by simple rapid one-pot reaction obtain pure RTPs various colors. Among these polymers, the highest quantum yield PAPHE reaches 14.7%. Furthermore, afterglow colors can be modulated from blue red introducing three into them. Importantly, acquired TPAP-514 exhibits at room temperature chromaticity coordinates (0.33, 0.33) when ratio suitable value owing three-primary-color mechanism. Systematic studies prove that emission comes superposition triplet excited states components. Moreover, potential applications obtained light-emitting diodes dynamic anti-counterfeiting are explored. The proposed provides new idea constructing intrinsic diverse white-light RTPs.

Language: Английский

Citations

30
Visible-light-excited robust room-temperature phosphorescence of dimeric single-component luminophores in the amorphous state DOI Creative Commons

Danman Guo,

Wen Wang, Kaimin Zhang

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: April 27, 2024

Abstract Organic room temperature phosphorescence (RTP) has significant potential in various applications of information storage, anti-counterfeiting, and bio-imaging. However, achieving robust organic RTP emission the single-component system is challenging to overcome restriction crystalline state or other rigid environments with cautious treatment. Herein, we report a persistent aggregated forms, such as crystal, fine powder, even amorphous states. Our experimental data reveal that vigorous emissions rely on their tight dimers based strong large-overlap π - interactions between polycyclic aromatic hydrocarbon (PAH) groups. The dimer structure can offer not only excitons low energy levels for visible-light excited red long-lived but also suppression nonradiative decays an good resistance heat (up 70 °C) water. Furthermore, demonstrate water-dispersible nanoparticle over 600 nm lifetime 0.22 s cellular in-vivo imaging, prepared through common microemulsion approach without overcaution nanocrystal formation.

Language: Английский

Citations

30
Stable and ultralong room-temperature phosphorescent copolymers with excellent adhesion, resistance, and toughness DOI Creative Commons
Yiling Miao, Faxu Lin,

Danman Guo

et al.

Science Advances, Journal Year: 2024, Volume and Issue: 10(10)

Published: March 8, 2024

Developing stable room-temperature phosphorescence (RTP) emission without being affected by moisture and mechanical force remains a great challenge for purely organic systems, due to their triplet states sensitive the infinitesimal motion of phosphors oxygen quencher. We report kind highly robust phosphorescent doping rigid phosphor into copolymer (polyvinyl butyral resin) matrix with balance mutually exclusive features, including rigidly hydrophilic hydrogen bond network elastically hydrophobic constituent. Impressively, these RTP polymeric films have superior adhesive ability on various surfaces showed reversible photoactivated lifetimes up 5.82 seconds, which can be used as in situ modulated anticounterfeit labels. They maintain bright afterglow over 25.0 seconds under practical conditions, such storage refrigerators, soaking natural water month, or even subjected strong collisions impacts. These findings provide deep insights developing ultralong materials desirable comprehensive performance.

Language: Английский

Citations

28
Enabling robust blue circularly polarized organic afterglow through self-confining isolated chiral chromophore DOI Creative Commons
Mingjian Zeng, Wei‐Guang Wang, Shuman Zhang

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: April 9, 2024

Abstract Creating circularly polarized organic afterglow system with elevated triplet energy levels, suppressed non-radiative transitions, and effective chirality, which are three critical prerequisites for achieving blue afterglow, has posed a formidable challenge. Herein, straightforward approach is unveiled to attain materials by covalently self-confining isolated chiral chromophore within polymer matrix. The formation of robust hydrogen bonds the matrix confers distinctly stabilized molecular state chromophores, endowing emission band at 414 nm, lifetime 3.0 s, luminescent dissymmetry factor ~ 10 −2 . Utilizing synergistic chirality transfer, full-color systems endowed doping colorful fluorescent molecules into designed polymers, empowering versatile applications. This work paves way streamlined design materials, expanding horizons various domains.

Language: Английский

Citations

27
Management of triplet excitons transition: fine regulation of Förster and dexter energy transfer simultaneously DOI Creative Commons
Jiaqiang Wang, Yujie Yang, Xinnan Sun

et al.

Light Science & Applications, Journal Year: 2024, Volume and Issue: 13(1)

Published: Jan. 30, 2024

Abstract Understanding and management of triplet excitons transition in the same molecule remain a great challenge. Hence, for first time, by host engineering, manageable transitions naphthalimide derivative NDOH were achieved, monitored through intensity ratio (I TADF /I RTP ) between thermally activated delayed fluorescence (TADF) room-temperature phosphorescence (RTP). Energy differences lowest excited states guest changed from 0.03 to 0.17 eV, I decreased 200 times, thus red shifting afterglow color. It was proposed that shorter conjugation length led larger band gaps materials, contributing efficient Dexter inefficient Förster energy transfer. Interestingly, no singlet state only strongest with quantum yield 13.9% could be observed, when PBNC loosest stacking largest gap acted as host. This work provides novel insight prediction exciton development smart materials.

Language: Английский

Citations

22