Switchable and Highly Robust Ultralong Room‐Temperature Phosphorescence from Polymer‐Based Transparent Films with Three‐Dimensional Covalent Networks for Erasable Light Printing

Li, Jianan; Zhang, Letian; Wu, Chunlei; Huang, Zihao; Li, Shufeng; Zhang, Huaqing; Yang, Qingchen; Mao, Zhu; Luo, Suilian; Liu, Cong; Shi, Guang; Xu, Bingjia

doi:10.1002/ange.202217284

Cited by 5 publications

(1 citation statement)

References 65 publications

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“…Thus far, lots of photo-responsive materials together with respective mechanisms have been proposed, including molecular photoswitches (e.g. azobenzene, spiropyran and diarylethene) [15][16][17][18] , photoactivated phosphorescence via 3 O 2 consumption [19][20][21][22] and photoinduced radical materials [23][24][25][26] . Nevertheless, most of them, especially those undergo photochemical reactions, experience colour change of appearance during photoluminescence (PL) transformation, which limits their applications in information encryption.…”

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confidence: 99%

Photo-luminochromism of organic crystals arising from subtle molecular rearrangement

Yuan,

Zhao,

Cai

et al. 2023

Preprint

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Photo-responsive colour-changing luminescent materials play an increasingly significant role in intelligent applications for their programmability. Nevertheless, current research mainly focuses on photochemical processes, while the photoluminescence (PL) transformation is scarcely accomplished by uniformly adjusting the aggregation mode. Here we show an impressive photo-luminochromism phenomenon from organic crystals (e.g. dimethyl terephthalate crystals) with PL varying from dark blue to purple and then to bright orange. This change is attributed to the subtle molecular rearrangement prompted by light irradiation. The through-space π-π interactions and moderate short contacts between ester groups are vital to enable this process. Furthermore, while the irradiated crystals own outstanding stability, the PL transformation is reversible with sufficient relaxation. These materials show promising applications in information storage and smart optoelectronic devices. These findings provide a new venue to the construction of smart photo-luminochromic materials with remarkable PL colour changes through molecular rearrangement.

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confidence: 99%

Photo-luminochromism of organic crystals arising from subtle molecular rearrangement

Yuan,

Zhao,

Cai

et al. 2023

Preprint

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π–π Interaction‐Induced Organic Long‐wavelength Room‐Temperature Phosphorescence for In Vivo Atherosclerotic Plaque Imaging

Zhang,

Li,

Zhao

et al. 2023

Angewandte Chemie

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Room‐temperature phosphorescent (RTP) materials have great potential for in vivo imaging because they can circumvent the autofluorescence of biological tissues. In this study, a class of organic‐doped long‐wavelength (≈600 nm) RTP materials with benzo[c][1,2,5] thiadiazole as a guest was constructed. Both host and guest molecules have simple structures and can be directly purchased commercially at a low cost. Owing to the long phosphorescence wavelength of the doping system, it exhibited good tissue penetration (10 mm). Notably, these RTP nanoparticles were successfully used to image atherosclerotic plaques, with a signal‐to‐background ratio (SBR) of 44.52. This study provides a new approach for constructing inexpensive red organic phosphorescent materials and a new method for imaging cardiovascular diseases using these materials.

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Enabling Highly Robust Full‐Color Ultralong Room‐Temperature Phosphorescence and Stable White Organic Afterglow from Polycyclic Aromatic Hydrocarbons

Liang,

Hu,

Zhang

et al. 2024

Angewandte Chemie

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In this work, full‐color and stable white organic afterglow materials with outstanding water, organic solvents, and temperature resistances have been developed for the first time by embedding the selected polycyclic aromatic hydrocarbons into melamine‐formaldehyde polymer via solution polymerization. The afterglow quantum yields and lifetimes of the resulting polymer films were up to 22.7% and 4.83 s under ambient conditions, respectively. For the coronene‐doped sample, its afterglow color was linearly tunable between yellow and blue by temperature, and it could still emit intense blue afterglow with a lifetime of 0.68 s at 440 K. Moreover, the films showed bright and stable white afterglow at 370 K with a lifetime of 2.80 s and maintained excellent afterglow performance after soaking in water and organic solvents for more than 150 days. In addition, the application potential of the polymer films in information encryption and anti‐counterfeiting was also demonstrated.

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Switchable and Highly Robust Ultralong Room‐Temperature Phosphorescence from Polymer‐Based Transparent Films with Three‐Dimensional Covalent Networks for Erasable Light Printing

Cited by 5 publications

References 65 publications

Photo-luminochromism of organic crystals arising from subtle molecular rearrangement

Photo-luminochromism of organic crystals arising from subtle molecular rearrangement

π–π Interaction‐Induced Organic Long‐wavelength Room‐Temperature Phosphorescence for In Vivo Atherosclerotic Plaque Imaging

Enabling Highly Robust Full‐Color Ultralong Room‐Temperature Phosphorescence and Stable White Organic Afterglow from Polycyclic Aromatic Hydrocarbons

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