Tunable Second‐Level Room‐Temperature Phosphorescence of Solid Supramolecules between Acrylamide–Phenylpyridium Copolymers and Cucurbit[7]uril

Liu, Yu; Xu, Wenwen; Chen, Yong; Qin, Yuexiu; Zhang, Hui; Lü, Yue; Xu, Xiufang

doi:10.1002/ange.202115265

Cited by 10 publications

(1 citation statement)

References 141 publications

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“…License: CC BY-NC 4.0 3 duration when pairing different dopants and matrices. Many efficient RTP materials with varied performances have already been fabricated based on this strategy 15,19,[30][31][32][33] . These bi-component afterglow materials can be categorized into two distinct types: one stemming from charge transfer states [23][24]28 and the other from the triplet excited state of dopants 9,16,25,34 .…”

Section: Introductionmentioning

confidence: 99%

Ion-Radical Mediated Multi-Color Ultra-Long Afterglow Materials

Ma,

Liu,

Jiang

et al. 2024

Preprint

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Pure organic persistent room temperature phosphorescence (RTP) has shown great potential in numerous applications, ranging from information encryption and display technologies to bio-applications and beyond. In this work, a suite of multi-color long-lived RTP materials featuring distinct afterglow emissions was constructed using an ion-radical mediated approach. b[c]p/MeBPO emitted a vivid yellow afterglow centered at 560 nm with an impressively long lifetime of 860.01 ms. While compound b[a]a exhibited a near-infrared (NIR) afterglow (τ = 215.96 ms) after doping into the matrix. The transient absorption spectroscopy investigations disclosed that the observed afterglow phenomenon was fundamentally tied to the generation of radical ions rather than the exciplex. These radical ions resulted from the reduction quenching process of the triplet excited state of compound BPO by the ground state of the doping agent. A novel evaluation methodology was devised, rooted in Marcus theory, to gauge the potential of a specific dopant-matrix combination towards generating pronounced afterglow. According to this framework, the enhancement of the afterglow is directly proportional to the decrease in the activation energy (ΔG≠) associated with the electron transfer reaction occurring between the dopant and the matrix. Notably, when the ΔG≠ surpasses 30 kcal/mol, no observable afterglow occurs, as higher ΔG≠ values significantly impede the electron transfer reaction between the two components. Furthermore, the system exhibits exceptional sensitivity, with the dopant as low as 0.02‰ molar ratio between the dopant and the host material. This remarkable dependence of afterglow intensity on the dopant concentration renders the bi-component RTP system highly promising for applications requiring ultra-high sensitivity and broad-spectrum detection capabilities.

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Section: Introductionmentioning

confidence: 99%

Ion-Radical Mediated Multi-Color Ultra-Long Afterglow Materials

Ma,

Liu,

Jiang

et al. 2024

Preprint

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Intriguing Room Temperature Phosphorescence in Crystalline Porous Organic Frameworks

Zhu,

Wang,

2023

Adv Funct Materials

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Organic room temperature phosphorescence (RTP) materials have become a hot topic in the field of luminescence wherein the crystalline porous organic frameworks (metal–organic frameworks (MOFs), hydrogen‐bonded organic frameworks (HOFs), covalent organic frameworks (COFs))‐based RTP materials are receiving considerable attention. Beyond all doubt, crystalline porous organic frameworks‐based RTP materials perfectly integrate the advantages of crystalline porous organic frameworks and RTP materials. This review provides a timely and brief outline for the development of crystalline porous organic frameworks RTP materials including the construction strategy of MOFs/HOFs/COFs‐based RTP materials and their RTP performance as well as potential applications. Moreover, the conclusion and outlook are also discussed to present the challenges and prospects for further development of high‐performance MOFs/HOFs/COFs‐based RTP materials.

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Vibration‐Regulated Multi‐State Long‐Lived Emission from Star‐Shaped Molecules

Baryshnikov

Siddique

et al. 2022

Angewandte Chemie

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How to utilize molecular vibration to tune triplet‐involved emissions in multiple states is highly challenging. Here, star‐shaped triphenylamine derivatives have been employed as model systems to understand how molecular vibration affects thermally activated delayed fluorescence (TADF) and room temperature phosphorescence (RTP) emissions in multiple states. Nonplanar, star‐shaped conformations allow molecules to generate appropriate vibrations in the solution state, facilitating vibronic coupling between their T1 and T2 states to generate effective TADF. More importantly, a relatively dispersed state can allow the molecules to efficiently vibrate in the solid state, and a crystalline environment further promotes a more efficient TADF. Lastly, by suppressing molecular vibration to inhibit the TADF, ultra‐long RTP was observed upon doping these molecules into polymers. These molecules can be used in information encryption and storage as well as bioimaging.

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Tunable Second‐Level Room‐Temperature Phosphorescence of Solid Supramolecules between Acrylamide–Phenylpyridium Copolymers and Cucurbit[7]uril

Cited by 10 publications

References 141 publications

Ion-Radical Mediated Multi-Color Ultra-Long Afterglow Materials

Ion-Radical Mediated Multi-Color Ultra-Long Afterglow Materials

Intriguing Room Temperature Phosphorescence in Crystalline Porous Organic Frameworks

Vibration‐Regulated Multi‐State Long‐Lived Emission from Star‐Shaped Molecules

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