Time-resolved encryption from a spiropyran derivative: High-contrasted and multi-state mechanochromism, photochromism and thermochromism

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 469, P. 143781 - 143781

Published: June 1, 2023

Language: Английский

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The Key Role of Molecular Packing in Luminescence Property: From Adjacent Molecules to Molecular Aggregates

Advanced Materials, Journal Year: 2023, Volume and Issue: unknown

Published: Sept. 22, 2023

Abstract The luminescence materials act as the key components in many functional devices, well detection and imaging systems, which can be permeated each aspect of modern life, attract more attention for creative technology applications. In addition to diverse properties organic luminogens, multiple molecular packing at aggregated states frequently offers new and/or exciting performance. However, there still lacks comprehensive analysis these materials, resulting an increased gap between design practical this review, from basic knowledge compounds single molecules, discernable property excimer, charge transfer (CT) complex or self‐assembly systems by adjacent finally opto‐electronic performance aggregates, relevant factors applications are discussed.

Language: Английский

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A new insight into aggregation structure of organic solids and its relationship to room‐temperature phosphorescence effect

Aggregate, Journal Year: 2023, Volume and Issue: 5(2)

Published: Nov. 13, 2023

Abstract In order to improve the performance of organic luminescent materials, lots studies have been carried out at molecular level. However, these materials are mostly applied as solids or aggregates in practical applications, which relationship between aggregation structure and property should be paid more attention. Here, we obtained five phenothiazine 5,5‐dioxide (O‐PTZ) derivatives with distinct conformations by rational design chemical structures, systematically studied their room‐temperature phosphorescence (RTP) effect solid state. It was found that O‐PTZ dimers quasi‐equatorial (eq) conformation tended show stronger π‐π interaction than quasi‐axial (ax) conformers crystal state, conducive generation RTP. Based on this result, a multi‐level structural model proposed draw RTP effect, just like research for structure‐property proteins. Using guide, boosted efficiency from 1% 20% successfully achieved corresponding host‐guest doping system, showing its wide applicability.

Language: Английский

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

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

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Aggregation-Induced Emission Luminogens for Latent Fingerprint Detection

Chemical Communications, Journal Year: 2024, Volume and Issue: 60(64), P. 8314 - 8338

Published: Jan. 1, 2024

For over a century, fingerprints have served as pivotal tool for identification of individuals owing to their enduring characteristics and easily apparent features, particularly in the realm criminal investigations. Latent (LFPs) are "invisible fingerprints" that most commonly available at crime scenes require rapid, selective, sensitive, convenient method detection. However, existing fingerprint development techniques harbour limitations, prompting exploration novel approaches prioritize investigator safety environmental sustainability. Leveraging unique photophysical properties aggregation-induced emission luminogens (AIEgens) has emerged promising strategy on-site analysis LFP visualization. In this highlight, we presented comparative various AIEgens (organic compounds, metal complexes, nanoparticles, polymers) detection LFPs. Through examination, insights into efficiency potential applications AIE-based provided. addition, several strategies been proposed circumventing limitations AIEgens. We hope highlight article will encourage more researchers investigate detection, contributing forensic science.

Language: Английский

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Latent fingerprint visualization with the novel white fluorescent fingerprint powders

Dyes and Pigments, Journal Year: 2024, Volume and Issue: 228, P. 112214 - 112214

Published: May 10, 2024

Language: Английский

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All-Fiber Volatile Organics-Perceptive Actuators

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

Soft robots with real-time volatile organic compound (VOC) perceptivity are promising for dynamic hazard detection. However, reconciling VOC-responsive actuation an autonomous perception remains challenging. Inspired by Victoria amazonica, which blooms and closes synchronous color change under environmental stimulations, we developed a solvatophore-induced solvatochromic-piezoelectric material synthesizing solvatochromic molecule-modified palygorskite-enhanced polyvinylidene difluoride realized all-fiber actuator piezoelectric properties cooperative visual electrical of organics. Under VOCs, the exhibits bidirectional bending, obvious stable change, characteristic output, allowing identification type concentration VOC. The demonstrates large bending curvature 4.63 cm-1, ultrafast response speed up to 4.36 cm-1 s-1, excellent stability 1500 cycles without fatigue, VOC-induced output reflecting conditions. sensing, manipulation, were demonstrated as applications. VOC-triggered soft robot motion capable autonomously perceiving responding This work presents widely applicable interactive visual-electronic VOC detection strategy safety, health, protection, could also inspire exploitation high-performance responsive fiber materials.

Language: Английский

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Multifunctional Eu(iii)-modified HOFs: roxarsone and aristolochic acid carcinogen monitoring and latent fingerprint identification based on artificial intelligence

Materials Horizons, Journal Year: 2023, Volume and Issue: 10(12), P. 5782 - 5795

Published: Jan. 1, 2023

The exploration of multifunctional materials and intelligent technologies used for fluorescence sensing latent fingerprint (LFP) identification is a research hotspot material science. In this study, an emerging crystalline luminescent material, Eu

Language: Английский

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Simple synthesis of carbon dots/organosilicon composites with tunable solid-state emission and size for accurate latent fingerprint identification

Journal of Materials Chemistry C, Journal Year: 2023, Volume and Issue: 12(1), P. 187 - 196

Published: Nov. 17, 2023

The CDs–OSi composites with tunable emission and size were prepared by adjusting the volume ratio of H 2 O EtOH in solvothermal. applied identification latent fingerprint effective definition contrast.

Language: Английский

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Hydrophilic Cocrystals with Water Switched Luminescence

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(8)

Published: Jan. 5, 2024

Utilizing water molecules to regulate the luminescence properties of solid materials is highly challenging. Herein, we develop a strategy produce water-triggered luminescence-switching cocrystals by coassembling hydrophilic donors with electron-deficient acceptors, where 1,2,4,5-Tetracyanobenzene (TCNB) was used as electron acceptor and pyridyl benzimidazole derivatives were enabling multiple hydrogen-bonds. Two cocrystals, namely 2PYTC 4PYTC obtained showed heat-activated emission, such emission could be quenched or weakened adding molecules. The cocrystal structure exhibited donor molecule that can form hydro bonds due many nitrogen atoms them. analyses photophysical data, powder X-ray diffraction, other data confirmed reversible fluorescence "on-off" effects caused eliminating in crystal lattice. density functional theory calculations indicate vibration O-H bond absorb excitation energy suppress fluorescence. Furthermore, also temperature, humidity, H

Language: Английский

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