Temperature‐Dependent Reversible Afterglow Between Green, Orange, and Red in Dual‐Delay Organic Doped Material DOI

Jianai Chen,

Jin Liu,

Liang Zeng

et al.

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(34)

Published: Sept. 30, 2024

Abstract Achieving a wide‐range color‐tunable and dynamically long‐afterglow emission in single‐doped system remains challenge. In this study, unique host‐guest doped material, TPA‐PTPQ/TPA, exhibits dual‐delay at 516 605 nm, both with long lifetimes of up to 108 145 ms, which derives from thermally activated delayed fluorescence (TADF) room temperature phosphorescence (RTP) mechanisms, respectively. Notably, material demonstrates temperature‐dependent reversible afterglow characteristic, transitioning green, orange, red substantial spectra shift ≈90 nm under different conditions. This phenomenon is due the diverse effect on TADF RTP emissions. These remarkable luminescence properties are successfully applied security checks anti‐counterfeiting encryption. study provides valuable insights into design dual‐delay‐emissive luminescent materials based doping system.

Language: Английский

The Impact of Molecular Packing on Organic Room Temperature Phosphorescence and Corresponding Stimulus Response Effect DOI
Jia Ren,

Mingxue Gao,

Zhenjiang Liu

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(26)

Published: Feb. 28, 2024

Abstract Organic luminescent materials exhibiting persistent room temperature phosphorescence (RTP) have garnered considerable interest due to their versatile applications. However, the mechanism is still unclear, especially for molecular structure‐molecular arrangement‐property relationship. Herein, six derivatives of phenothiazine 5,5‐dioxide are synthesized, revealing distinct RTP properties and associated underlying mechanisms. Careful analyses single crystal structures, combined with initial theoretical calculations, indicate that effect facilitated by effective intermolecular π–π interactions in solid state led folded conformation. Specifically, PTZO‐CF 3 ‐3F exhibits distinctive photo‐activated both grinding response changes arrangement. Besides, a porous structure found be present ‐2F crystal, offering it great sensitivity oxygen intensity lifetime. Accordingly, visual warning device fabricated successfully. Furthermore, successfully utilized applications anti‐counterfeiting optical logic gates, expanding scope stimulus‐responsive broader

Language: Английский

Citations

19
New Molecular Photoswitch Based on the Conformational Transition of Phenothiazine Derivatives and Corresponding Triplet Emission Properties DOI

Mingxue Gao,

Ruimin Wu,

Ya‐Wen Zhang

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Molecular photoswitch research has drawn much attention in the last century owing to its great potential development of smart materials. However, photoswitches suitable for constructing light-responsive luminescent materials remain limited, especially those involving triplet-state phosphorescence. Herein, we designed a novel molecular based on conformation transition phenothiazine derivatives, minimizing steric hindrance (-CH

Language: Английский

Citations

3
Aggregation control of anionic pentamethine cyanine enabling excitation wavelength selective NIR-II fluorescence imaging-guided photodynamic therapy DOI Creative Commons
Yibin Li, Fei Qu, Fang Wan

et al.

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 17, 2025

Near-infrared (NIR)-II fluorescence imaging-guided photodynamic therapy (PDT) has shown great potential for precise diagnosis and treatment of tumors in deep tissues; however, its performance is severely limited by the undesired aggregation photosensitizers competitive relationship between emission reactive oxygen species (ROS) generation. Herein, we report an example anionic pentamethine cyanine (C5T) photosensitizer high-performance NIR-II PDT. Through counterion engineering approach, a triphenylphosphine cation (Pco) modified with oligoethylene glycol chain synthesized adopted as C5T, which can effectively suppress excessive disordered resulting C5T-Pco optimizing dye amphipathicity enhancing cyanine-counterion interactions. Dynamic tuning characteristics ROS generation achieved at aggregate level, impressive type I under 760 nm light irradiation, accompanied efficient excited 808 nm. As result, excitation wavelength selective PDT been successfully demonstrated tumor therapeutics female mice.

Language: Английский

Citations

2
Förster Resonance Energy Transfer: Stimulus‐Responsive Purely Organic Room Temperature Phosphorescence through Dynamic B−N bond DOI

Liangjing Tu,

Yi Chen,

Xiaojuan Song

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(20)

Published: Feb. 28, 2024

Abstract Recently, stimulus‐responsive organic materials with room‐temperature phosphorescence (RTP) properties have attracted significant attention owing to their potential applications in chemical sensing, anticounterfeiting, and displays. However, molecular design currently lacks systematicity effectiveness. Herein, we report a capture‐release strategy for the construction of reversible RTP via B/N Lewis pairs. Specifically, acid 7‐bromo‐5,9‐dioxa‐13b‐boranaphtho[3,2,1‐de]anthracene (BrBA) can be deactivated through capturing by base, N , ‐diphenyl‐4‐(pyridin‐4‐yl)aniline (TPAPy), reactivated dissociation B−N bonds release BrBA. Reversible is attributed exceptional self‐assembly capability BrBA, whereas tunable colors are derived from distinct Förster resonance energy transfer (FRET) processes. The information storage anti‐counterfeiting were also experimentally validated. approach proposed this study offers an effective designing materials.

Language: Английский

Citations

15
Dynamic color‐tunable ultra‐long room temperature phosphorescence polymers with photo‐chromism and water‐stimuli response for multilevel anti‐counterfeiting DOI Creative Commons
Xiao Ma,

Tian‐Jiao Ye,

Han‐Jiang Yang

et al.

Aggregate, Journal Year: 2024, Volume and Issue: 5(5)

Published: May 8, 2024

Abstract Developing dynamic color‐tunable ultra‐long room temperature phosphorescence (URTP) polymers with afterglow of over 1 s, photo‐chromism, and multi‐stimuli response for practical anti‐counterfeiting information security applications is attractive but very challenging. Herein, by doping multicolor pyridinium bromide L block or viologen‐based photo‐chromic V into polyvinyl alcohol matrixes, the water‐stimuli‐responsive URTP polymer films up to 8 s reversible photochromic have been developed. More significantly, a series 6 water‐stimuli successfully exploited integrating blocks one system. Mechanistic investigations revealed that their photo‐chromism mainly comes from photo‐generated viologen free radicals. Furthermore, multilevel demonstrated. These results pave way develop smarter multifunctional materials optical sensing.

Language: Английский

Citations

10
Multistimuli-Responsive Room-Temperature Phosphorescence: Adjustable Electrostatic Interactions and the Corresponding Accurate Molecular Packing DOI

Guigui Ye,

Yujie Yang, Wentao Yuan

et al.

ACS Materials Letters, Journal Year: 2024, Volume and Issue: unknown, P. 4639 - 4648

Published: Sept. 6, 2024

Language: Английский

Citations

8
Phenothiazine Derivatives as Small‐Molecule Organic Cathodes with Adjustable Dropout Voltage and Cycle Performance DOI

Yanxiang Gong,

Weichao Zhang, Zhenjiang Liu

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(21)

Published: Feb. 9, 2024

Abstract Compared with conventional inorganic materials, organic electrodes are competitive candidates for secondary battery cathodes due to their resourcefulness, environmental friendliness, and cost‐effectiveness. Much effort is devoted at the level of chemical structure, while ignoring impact molecular aggregation on behavior. Herein, this work designs a series molecules two electrochemically active phenothiazine groups linked by different lengths alkyl chain regulate symmetry crystallinity. The results emphasize equally important role structure performance. Among them, 2PTZ‐C 7 H 14 |Li cell exhibits most impressive cycle rate At high 50 C, it can still deliver capacity 63.4 mA h g −1 74.5% retention after 10 000 cycles. Besides, dropout voltage 9 18 only 52 mV, which among lowest reported lithium‐organic batteries best author's knowledge.

Language: Английский

Citations

7
Room Temperature Phosphorescence with Time-Resolved Color Changes by Tuning the Conformation of Polyheterocyclic Phenothiazine Derivatives through the Electronic Effect DOI
Yu Tian, Jie Yang, Aisen Li

et al.

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(3), P. 943 - 953

Published: Feb. 13, 2024

The research on organic luminescent materials has attracted much attention for their wide applications. Generally, the molecular conformation is of great importance but often overlooked, regardless its packing in aggregated states and corresponding performance. In this work, relationship between electronic effect substituents thermodynamically stable phenothiazine derivatives explored first time. When substituent phenyl or a 3-position pyridyl group, quasi-equatorial (QE) conformer main thermo-stable conformation. At time, lone pair electrons 10-position nitrogen are stabilized by polyheterocyclic core, resulting formation large p-π-conjugated electron system. 2-pyridine 4-pyridine more easily electron-deficient pyridine system, another p-π conjugated conformation, namely quasi-axial (QA) conformer, formed. addition, effects two conformations photophysical properties investigated detail. It was found that emissive both singlet triplet largely affected Excitedly, based adjustable one molecule containing combined with 3D printing successfully applied to advanced anticounterfeiting time-resolved phosphorescence color changes.

Language: Английский

Citations

7
Ultralong Blue Organic Room‐Temperature Phosphorescence Promoted by Green Assembly DOI
Zhongyuan Chen, Zhaojun Chen, Yuqi Zhu

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(46)

Published: July 9, 2024

Abstract In recent years, there is a growing interest in developing ultralong organic room‐temperature phosphorescence (ORTP) with lifetimes the range of seconds. As one important three primary colors, blue ORTP an indispensable core component RTP regulation and application, however, large Stokes shift characteristics pose certain challenges ORTP. Here, new family phosphors are synthesized realized through crystal assembly water phase. Remarkably, compared to materials obtained phases, enabled long‐lived up 2.3 s quantum yield reached as high 29.27%. addition efficient green form, such dark possessed thermal stability flexible tunability. Moreover, superiority selected components demonstrated by comparing them polymer proposed show great potential programmable information encryption/anti‐counterfeiting.

Language: Английский

Citations

7
Visualization Detection of Ultralow Temperature Based on Flexible Cross–linked Polymer Systems DOI

Fengling Guo,

Qian Chen, Chen Li

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 28, 2024

Abstract Ultralow temperature storage has sparked considerable attention with the development of economy, showing promising applications ranging from biomedical to national defense and other fields. However, ultralow detection is constrained by brittleness current materials at low temperatures complexity techniques. Consequently, challenge exists in finding efficient solutions material tolerance issues achieving rapid temperature. Herein, a novel flexible cross–linked polymer TPTA@PU film long afterglow, high phosphorescence quantum efficiency, excellent mechanical properties are successfully fabricated. Interestingly, obtained films demonstrate notable thermoresponsive behavior, afterglow color shifting rapidly blue green within ranges 80 280 K. Additionally, there positive linear correlation between RGB values corresponding Based on these prominent features, an sensor realized utilizing as elements. This work can be expected provide more inspiration possibilities for using RTP cutting‐edge field.

Language: Английский

Citations

7