Exciplex-induced TADF, persistent RTP and ML in a host–guest doping system

Wang, Yunsheng; Gao, Mingxue; Ren, Jia; Liang, Jian; Zhao, Yao; Fang, Manman; Yang, Jie; Li, Zhen

doi:10.1039/d2qm01205g

Cited by 23 publications

(8 citation statements)

References 50 publications

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“…This indicated that the PtzO group acted as the donor (D) and the BP group as the acceptor (A) in the charge transfer effect of the PtzO-3C-BP crystal. 44,45 Because of the introduction of a non-conjugated alkyl chain between the donor and acceptor, it should be TSCT-enabled exciplex-based RTP emission (Fig. S17, ESI †).…”

Section: Tsct Characteristic Of Ptzo-3c-bpmentioning

confidence: 99%

Through-space charge transfer within single-component organic crystal: visual detection and rational regulation

Liu,

Ren,

Zhang

et al. 2024

J. Mater. Chem. C

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Section: Tsct Characteristic Of Ptzo-3c-bpmentioning

confidence: 99%

Through-space charge transfer within single-component organic crystal: visual detection and rational regulation

Liu,

Ren,

Zhang

et al. 2024

J. Mater. Chem. C

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“…18,41,42 In addition, a rigid host restricts the molecular motions, thus decreasing the non-radiative decay for the realization of emissive radicals. 43,44 Therefore, a host-guest RTP system that may generate and stabilize the unpaired electron could be a suitable system for the development of novel organic radical emitters.…”

Section: Introductionmentioning

confidence: 99%

Triplet-Induced Stable Organic Radical Emitter in Host-Guest Room-Temperature Phosphorescent Materials

Lei,

Li,

Zhang

et al. 2024

Preprint

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New strategies for the synthesis of stable organic luminescent radicals with their unique electronic structures are highly desirable. Herein, we designed and synthesized a novel arylboron compound BN-2Ph with radical-generating potential. BN-Ph was used as the guest molecule in the host-guest system, exhibiting high-efficiency and persistent phosphorescent emission. The long lifetime triplet exciton induced unexpected luminescent radicals with red emission in the doped crystalline state, which could be rapidly and reversibly generated by heating and recrystallizing. The quantitative electron paramagnetic resonance analysis and theoretical calculations suggest that the triplet-stabled photoinduced electron transfer mechanism between host and guest molecules is responsible for the generation and stabilization of radicals. This doped system was applied in AND and OR logic gates, showing its potential application in logic circuits. Our results provide a simple molecular-design strategy for achieving stable organic luminescent radicals.

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“…Currently, thermally activated delayed fluorescence (TADF) and room-temperature phosphorescence (RTP) have gained significant attention, due to their capability of fully harnessing triplet exciton and their long-lived feature. − In a given system, TADF and RTP, emitted from the S and T states, respectively, often cover different spectral regions due to their energy difference. In this way, they can be integrated to fulfill a variety of light-emission functionalities in white-light displays, lighting, information data storage, detectors, multilevel anticounterfeiting, and so on. − Luminogens that simultaneously give rise to TADF and RTP properties in the solid state have recently been developed, which can avoid energy crosstalk and unnecessary phase separation between different emitters. − However, there is still a lack of functional molecules that can integrate TADF and RTP in the solution aggregated state, considerably limiting the collaborative application of these remarkable photophysical behaviors in biological fields such as detection and imaging.…”

Section: Introductionmentioning

confidence: 99%

Deoxygenation-Promoted Aggregation-Induced TADF–RTP Dual Emission for High-Contrast Channel-Selectable Hypoxia Probing

Ye,

Zhou,

Sahoo

et al. 2024

J. Phys. Chem. C

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Thermally activated delayed fluorescence (TADF) and room-temperature phosphorescence (RTP) are two highly applicable emissive processes due to their time-resolved characteristics and their ability to respond to external stimuli. They have recently been integrated for comprehensive use in some solid-state luminogens; however, there remains a lack of molecular systems that can integrate them in the solution aggregated state, which considerably limits relevant biological applications. In this study, we present a molecular design enabling aggregation-induced TADF− RTP dual emission in the solution aggregated state, relying on the coexistence of T 1 -to-S 1 and T 1 -to-S 0 electronic processes in push− pull structures. This dual emission feature constitutes a broad spectral band with full width at half-maximum up to 175 nm, providing the ability to select different channels for biological detection and imaging. Moreover, deoxygenation is shown to promote molecular aggregation, leading to a significantly strengthened dual emission that enables a high-contrast hypoxia probing effect. These results not only reveal new photophysical mechanisms on organic molecules but also expand the detection functionality of luminescent materials in the biological field.

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Exciplex-induced TADF, persistent RTP and ML in a host–guest doping system

Abstract: The development of multifunctional luminescent materials is of great importance but really difficult, since different luminescent properties have different requirements for molecular structure. Herein, a universal platform of exciplex was...

Cited by 23 publications

References 50 publications

Through-space charge transfer within single-component organic crystal: visual detection and rational regulation

Through-space charge transfer within single-component organic crystal: visual detection and rational regulation

Triplet-Induced Stable Organic Radical Emitter in Host-Guest Room-Temperature Phosphorescent Materials

Deoxygenation-Promoted Aggregation-Induced TADF–RTP Dual Emission for High-Contrast Channel-Selectable Hypoxia Probing

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