Colloids and Surfaces A Physicochemical and Engineering Aspects, Год журнала: 2024, Номер 687, С. 133486 - 133486
Опубликована: Фев. 15, 2024
Язык: Английский
Advanced Materials, Год журнала: 2024, Номер unknown
Опубликована: Сен. 13, 2024
The combination of advanced photoluminescence characteristics to photochromism is highly attractive in preparing high-performance multifunctional photo-responsive materials for optoelectronic applications. However, this rather challenging material design owing the limited mechanism understanding and construction principles. Here, an effective strategy integrate afterglow emission carbon dots (CDs) proposed through embedding naphthaleneimide (NI) structure CDs followed by polyvinylpyrrolidone (PVP) encapsulation. NI-structured CDs-PVP shows intrinsic situ formation NI-radical anions controllable multi-stimuli-responsive behaviors related oxygen-trigged triplet exciton quenching Förster resonance energy transfer (FRET) from pristine photoactivated radicals. Notably, a wide range appearance colors colorless brown, luminescence color transition blue yellow, much elongated lifetime up 253 ms are observed. With extraordinary stimuli-chromic stimuli-luminescent film dynamically responsive multiple external stimuli, reversible secure snapchat, data encryption/decryption synaptic imaging recognition realized. These findings demonstrate fundamental principle photochromic with afterglow, providing important understandings on synergic dynamic thereby expanding their applications information anti-counterfeiting artificial intelligence.
Язык: Английский
Процитировано
18
Chemical Engineering Journal, Год журнала: 2023, Номер 476, С. 146405 - 146405
Опубликована: Окт. 11, 2023
Язык: Английский
Процитировано
43
Journal of the American Chemical Society, Год журнала: 2023, Номер 146(2), С. 1294 - 1304
Опубликована: Дек. 6, 2023
Achieving time-dependent phosphorescence color (TDPC) in organic materials is attractive but extremely challenging due to the nonradiative decay and modulation puzzle of triplet state. Herein, xylan, a hemicellulose waste from paper mill, was used construct carbonized polymer dots (CPDs) with clusterization-triggered room-temperature (RTP). CPDs were endowed tuneable energy levels by through-space conjugation heteroatom groups, which could be confined silica simultaneously activate surface oxide-related low-energy cross-linked core N-related high-energy emissive centers. Thus, blue center lifetime 425.6 ms green longer 1506 coexisted CPDs; former dominant contribution RTP at first, latter became over time, leading typical TDPC evolution large contrast blue-green then green. Meanwhile, remain unobstructed after soaked water for more than month. The successfully applied location deformation imaging hydrogel advanced dynamic information encryption anticounterfeiting. work may shed new light on design broaden high-value use paper-mill xylan.
Язык: Английский
Процитировано
43
Chemical Engineering Journal, Год журнала: 2023, Номер 474, С. 145597 - 145597
Опубликована: Авг. 23, 2023
Язык: Английский
Процитировано
38
Advanced Functional Materials, Год журнала: 2023, Номер 34(7)
Опубликована: Ноя. 3, 2023
Abstract Room temperature phosphorescent carbon dots (RTP CDs) have received increasing attention in recent years due to their outstanding optical properties and potential applications. It is worth noting that RTP CDs aqueous solution inspired special interests because of low toxicity, long lifetime, ability avoid autofluorescence background fluorescence, exhibiting wide application prospects time‐resolved biological imaging sensing. However, achieving solutions remains a considerable challenge water molecules oxygen can cause the deactivation triplet‐state excitons, resulting phosphorescence quenching. Several strategies been proposed counter problem including encapsulated rigid matrix, hydrogen bonding, covalent bonding fixation. Consequently, more significant number materials with excellent stability, multicolor are successfully obtained. Herein, development as well corresponding fabricated luminescence mechanism detailly summarized reviewed. Furthermore, various applications water‐phase information security, sensing, bioimaging, light‐emitting diodes, fingerprinting also discussed. Finally, an outlook on proposed.
Язык: Английский
Процитировано
36
Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(52)
Опубликована: Ноя. 16, 2023
The development of ultra-long room-temperature phosphorescence (UL-RTP) in processable amorphous organic materials is highly desirable for applications flexible displays, anti-counterfeiting, and bio-imaging. However, achieving efficient UL-RTP from remains a challenging task, especially with activation by visible light bright afterglow. Here we report general rational molecular-design strategy to enable visible-light-excited multi-esterification rigid large-plane core. Notably, minimizes the aggregation-induced quenching accomplishes 'four birds one stone' possibility generation radiation process UL-RTP: i) shifting excitation ultraviolet blue-light through enhancing transition dipole moment low-lying singlet-states, ii) facilitating intersystem crossing incorporation lone-pair electrons, iii) boosting decay long-lived triplet excitons resulting significantly increased moment, iv) reducing intrinsic nonradiative substitution high-frequency vibrating hydrogen atoms. All these factors synergistically contribute most stable visible-light-stimulated (lifetime up 2.01 s efficiency 35.4 % upon at 450 nm) films using multi-esterified coronene, which allows high-tech single-component time-delayed white light-emitting diodes information technology based on flashlight-activated afterglow encryption.
Язык: Английский
Процитировано
30
Small, Год журнала: 2023, Номер 19(31)
Опубликована: Июнь 6, 2023
Phosphorescent materials as block elements to build artwork incorporating the time and emission, enable them with spectacular lighting effects. In this work, enhanced phosphorescence of carbon nanodots (CNDs) is demonstrated via double confinement strategy, which silica epoxy resin are used first second order layer. The multi-confined CNDs show an quantum yield up 16.4%, enduring emission lifetime 1.44 s. Delicately, plasticity enables easily be designed for 3D artworks long lifetimes in different shapes. efficient eco-friendly phosphorescent may arouse intense interest both academic community markets.
Язык: Английский
Процитировано
27
Small Methods, Год журнала: 2023, Номер 8(1)
Опубликована: Окт. 27, 2023
Abstract Carbon dots (CDs), as emerging long afterglow luminescent material, have attracted the attention of researchers and become one hot topics in materials. In recent years, obtained a series CDs‐based materials with different properties utilizing matrix‐assisted self‐protective methods. To meet diverse application needs, development multicolor is focus challenge this field. Most previously reported generally emit blue or green afterglow. Recently, some systems been discovered, emission range can extend from ultraviolet to near‐infrared. However, there lack systematic in‐depth analysis regarding preparation strategy luminescence mechanism Based on this, review summarizes strategies raw reaction parameters. Then, mechanisms are analyzed seven factors, including carbonization degree, surface state, aggregation temperature dependence, excitation multi‐emission center, energy transfer. Moreover, applications introduced. Finally, problems challenges field discussed, future directions analyzed.
Язык: Английский
Процитировано
24
Advanced Science, Год журнала: 2024, Номер 11(18)
Опубликована: Март 29, 2024
Abstract Advancing a metal‐free room temperature phosphorescent (RTP) material that exhibits multicolor emission, remarkable RTP lifetime, and high quantum yield still faces the challenge of achieving intersystem crossing between singly triplet excited states, as well rapid decay states due to nonradiative losses. In this study, novel strategy is proposed address these limitations by incorporating o‐phenylenediamine, which generates multiple luminescent centers, long‐chain polyacrylic acid synthesize carbonized polymer dots (CPDs). These CPDs are then embedded in rigid B 2 O 3 matrix, effectively limiting losses through synergistic effects cross‐linking matrix. The resulting CPD‐based materials exhibit ultralong phosphorescence shades blue lime green, with visible lifetime up 49 s yield. Simultaneously, study demonstrates practical applicability excellent properties anti‐counterfeiting information encryption.
Язык: Английский
Процитировано
16
Small Structures, Год журнала: 2024, Номер 5(7)
Опубликована: Фев. 29, 2024
The preparation of mechanical robust organic room‐temperature phosphorescence (RTP) materials especially with white afterglow is attractive but rarely reported. Herein, a method to produce colorful RTP transparent wood (PTW) by infiltrating delignified poly (vinyl alcohol) solutions containing arylboronic acids various π conjugations doubly rigid environment provided the B─O covalent bonds and hydrogen can stabilize triplet excitons, leading ultralong lifetime up 2.13 s excellent emission stability (without obviously quenching over month) target PTW. Besides, as promising structural material for optical applications, PTW shows combined advantages multicolored persistent luminescence (from blue green then red), good transmittance (≈90%), striking strength (≈154 MPa). More importantly, introducing appropriate amount fluorescent dye rhodamine 6 G afterglow, 1.85 successfully achieve through triplet‐to‐singlet Förster resonance energy transfer. function window, anticounterfeiting label, time delay lighting. This success paves way development robust, ecofriendly, practical materials.
Язык: Английский
Процитировано
14