Controlling Noncovalent π–π Interactions in Dimers Toward Thermally Reversible Switching Between Monomer and Excimer Fluorescence DOI Open Access

Chang Xi,

Xiangyu Zhang, Shiyin Wang

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 18, 2025

Abstract Thermochromic fluorescent materials (TFMs) have garnered great attention due to their unique fluorescence transition responsive temperature. However, the application of TFMs is limited defects such as low thermosensitivity and a high temperature‐responsive threshold value. In this case, work explores feasible strategy for designing TFMs. On one hand, sterically hindered unilateral tetraphenylethylene (TPE) substituent introduced into pyrene chromophore in meta‐ linkage mode. This type molecular architecture aimed at integration both aggregation‐induced emission (AIE) character isolated π–π dimer stacking, facilitating achievement contrast intensity (i.e., strongly emissive aggregation state versus weakly dispersion state) color ( i.e , excimer monomer). other an effective matrix platform featured with alky chain length‐dependent temperature‐induced phase constructed assist fabrication desired patterns through temperature‐controlled reversible between crystalline non‐dispersion liquated states. The findings demonstrate that these studied can be potentially applied temperature indicators switchable dynamic interior decoration, which provides new avenue design

Language: Английский

Integrating Full‐Color 2D Optical Waveguide and Heterojunction Engineering in Halide Microsheets for Multichannel Photonic Logical Gates DOI Creative Commons

Xing Chang,

Bo Zhou, Dongpeng Yan

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 11(17)

Published: Feb. 29, 2024

Ensuring information security has emerged as a paramount concern in contemporary human society. Substantial advancements this regard can be achieved by leveraging photonic signals the primary carriers, utilizing logical gates capable of wavelength tunability across various time and spatial domains. However, challenge remains rational design materials possessing space-time-color multiple-resolution capabilities. In work, facile approach is proposed for crafting metal-organic halides (MOHs) that offer resolution. These MOHs integrate time-resolved room temperature phosphorescence color-resolved excitation dependencies with both space-resolved ex situ optical waveguides heterojunctions. Capitalizing on these multifaceted properties, MOHs-based two-dimensional (2D) heterojunctions exhibit ability to tune full-color emissions spectra from blue red, operating within different temporal scales. Therefore, work introduces an effective methodology engineering resolved MOH microstructures, holding significant promise development high-density devices.

Language: Английский

Citations

46
Visible‐Light Manipulated Reversible and Ultralong Phosphorescence of Carbon Dots Through Dynamic Cross‐Linking DOI
Tao Zhang, Mei‐Yan Wang,

Lele Liu

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(45)

Published: May 29, 2024

Abstract Dynamic organic room‐temperature phosphorescence (RTP) materials are highly promising for various applications. However, developing photo‐responsive RTP systems with simple fabrication, high reversibility, and visible‐light responsiveness presents a significant challenge. Herein, in situ embedding of boron‐doped carbon dots (B‐CDs) amorphous polymer (pPBA) is achieved by two‐step polymerization carbonization process. Impressively, the B‐CDs@pPBA composite exhibits visible‐light‐activated ultralong full reversibility lifetime on–off ratio exceeding 280. By correlating photophysical properties structural characterization results, it concluded that photoinduced intensifying crosslinking between B‐CDs pPBA responsible dynamic RTP. More interestingly, film found to display bending actuation reversible deformable behavior upon light exposure. Finally, potential applications such programmable information storage encryption demonstrated. This research may pave new way development nanomaterials promote their use wide range

Language: Английский

Citations

19
Advances in organic room-temperature phosphorescence: Design strategies, photophysical mechanisms, and emerging applications DOI

Yujie Yang,

Qianqian Li, Zhen Li

et al.

Materials Chemistry Frontiers, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Organic room-temperature phosphorescence can be facilitated according to rational design principles that promote intersystem crossing and decrease non-radiative decay in aggregated states, demonstrating versatile applications across multiple fields.

Language: Английский

Citations

2
A Facile Strategy for Achieving Polymeric Afterglow Materials with Wide Color‐Tunability and Persistent Near‐Infrared Luminescence DOI

Keyao Chen,

Yu Xiong, Deliang Wang

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(12)

Published: Dec. 10, 2023

Abstract Polymer‐based room‐temperature phosphorescence (RTP) materials show promising applications in anti‐counterfeiting. To further realize multiscale and/or multimodal anti‐counterfeiting, it is highly desirable to develop polymeric afterglow with multiple security features. Herein, a facile strategy presented endow ultralong lifetime, wide color‐tunability, persistent near‐infrared (NIR) luminescence, and good water solubility via constructing non‐traditional resonance energy transfer (PRET) two‐step sequential systems. Specifically, the 1‐bromocarbazole derivatives blue‐color RTP property act as donor while traditional dyes red/NIR luminescence acceptor. By simply regulating doping composition concentration of these systems, multicolor organic covering from visible NIR region successfully realized. Notably, compared single‐step PRET, has unique advantages higher efficiency triplet excitons initial donor, wider range color‐tunability mediated by intermediary acceptor, enhanced delayed fluorescence final Finally, water‐soluble great potential advanced anti‐counterfeiting information technologies.

Language: Английский

Citations

26
Assembly‐Induced Dynamic Structural Color in a Host‐Guest System for Time‐Dependent Anticounterfeiting and Double‐Lock Encryption DOI

Yufan Ji,

Tianfu Song, Haifeng Yu

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(26)

Published: April 10, 2024

Manipulation of periodic micro/nanostructures in polymer film is great importance for academics and industrial applications anticounterfeiting. However, with the increasing demand on information security, materials time-dependent features are urgently required, especially material where same can appear more than once time scale. Here, one concise strategy to realize anticounterfeiting "double-lock" encryption based a host-guest system proposed, photoresponsive azopolymer as host liquid-crystalline molecule guest. The exhibits tunable mass transport pre-designed by tailoring process cis-to-trans recovery azo groups assembly mesogenic trans-isomers, resulting dynamic structural color film. Taking advantage this extraordinary feature, has been achieved. More importantly, each state's appearance whole be modulated changing ratio. Combining manipulatable unique decoding method, stored decrypted correctly. This work provides an unprecedented approach advanced technology higher level security high-end encryption.

Language: Английский

Citations

16
Single-actuated and fully recyclable phase change materials enabled multiple thermochromism toward information storage and encryption DOI
Shiwei Zhao, Anqian Yuan, Xingbao Chen

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 481, P. 148698 - 148698

Published: Jan. 12, 2024

Language: Английский

Citations

13
Flexible Organic Chiral Crystals with Thermal and Excitation Modulation of the Emission for Information Transmission, Writing, and Storage DOI

Xiuhong Pan,

Linfeng Lan, Liang Li

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(15)

Published: Feb. 10, 2024

Organic single crystals quickly emerge as dense yet light and nearly defect-free media for emissive elements. Integration of functionalities control over the properties is currently being explored a wide range these materials to benchmark their performance against organic diluted in powders or films. Here, we report mechanically flexible chiral capable an unprecedented combination fast, reversible, low-fatigue responses. UV-excited both enantiomers material, 4-chloro-2-(((1-phenylidene)imino)methyl)phenol, exhibit drastic reversible change emission color from green orange-yellow within second can be cycled at least 2000 times. The photoresponse was found depend strongly on excitation intensity temperature. Combining chirality, mechanical compliance, rapid switching, multiple responses, writability by UV light, this material provides unique versatile platform developing crystal-based on-demand signal transfer, information storage, cryptography.

Language: Английский

Citations

13
Hydrogen Bond‐Associated Photofluorochromism for Time‐Resolved Information Encryption and Anti‐counterfeiting DOI

Yuqian Xie,

Xiaomei Zhao, Hong Wang

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 23, 2024

Abstract Time‐resolved photofluorochromism constitutes a powerful approach to enhance information encryption security but remains challenging. Herein, we report strategy of using hydrogen bonds regulate the time for initiating photofluorochromism. In our strategy, copolymers containing negative photochromic spiropyran (NSP), naphthalimide, and multiple hydrogen‐bonding (UPy) units are designed, which display photo‐switchable fluorescence resonance energy transfer (FRET) process from naphthalimide donor NSP acceptor. Interestingly, FRET is locked via dynamic interaction between ring‐opened UPy moieties, resulting in time‐dependent fluorescence. The change can be finely regulated fraction polymers. Besides novel fluorescence, polymers also take advantage visible‐light triggerable, excellent photostability, photoreversibility, processability. We demonstrate that these properties enable them many application opportunities such as fluorescent labels multilevel patterns.

Language: Английский

Citations

12
A Dynamic H‐Bonding Network Enables Stimuli‐Responsive Color‐Tunable Chiral Afterglow Polymer for 4D Encryption DOI Open Access

Guangyao Guo,

Huanhuan Li,

Yingmeng Yan

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(47)

Published: Oct. 6, 2024

Abstract The development of stimuli‐responsive and color‐tunable chiral organic afterglow materials has attracted great attention but remains a daunting challenge. Here, simple yet effective strategy through the construction dynamic H‐bonding network is proposed to explore multi‐color by doping self‐designed phosphorescent chromophore into polyvinyl alcohol matrix. A deep blue system with lifetime up 3.35 s, quantum yield 25.0%, luminescent dissymmetry factor 0.05 achieved reversible formation breakdown upon thermal‐heating water‐fumigating. Moreover, can be obtained energy transfer, allowing establishment information displays high‐level 4D encryption. This work not only offers facile platform develop advanced also opens new avenue for developing next‐generation optical technology enhanced functionality responsiveness.

Language: Английский

Citations

11
Color‐Tunable Room‐Temperature Phosphorescence from Non‐Aromatic‐Polymer‐Involved Charge Transfer DOI Creative Commons
Ningyan Li,

Xipeng Yang,

Binbin Wang

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 11(30)

Published: June 14, 2024

Polymeric room-temperature phosphorescence (RTP) materials especially multicolor RTP systems hold great promise in concrete applications. A key feature these applications is a triplet charge transfer transition. Aromatic electron donors and acceptors are often essential to ensure persistent RTP. There much interest fabricating non-aromatic charge-transfer-mediated it still remains formidable challenge achieve color-tunable via transfer. Herein, material by embedding quinoline derivatives within polymer matrix such as polyacrylamide (PAM) or polyvinyl alcohol (PVA) developed. Through-space (TSCT) achieved upon alkali- heat treatment realize long lifetime of up 629.90 ms, high quantum yield 20.51%, green-to-blue afterglow for more than 20 s at room temperature. This emerges from nonaromatic single phosphor that has rarely been reported before. finding suggests an effective simple approach can deliver new including display, information encryption, gas detection.

Language: Английский

Citations

9