Cascade energy transfer endows phosphorescent carbon dots-based films with tunable and broadband afterglow for fingerprint recognition and anticounterfeiting

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160311 - 160311

Опубликована: Фев. 1, 2025

Язык: Английский

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A Highly Selective Probe for Real-Time Monitoring of Ethylenediamine with Ratiometric Luminescent and Colorimetric Dual-Mode Responses

Analytical Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Янв. 14, 2025

Ethylenediamine (EDA), as an important chemical raw material and fine intermediate, has been widely applied in various industries. Real-time monitoring of EDA is highly desirable daily life due to its potential threat human health. Herein, we report a molecular probe named 4,4'-(9H-carbazole-3,6-diyl)bis(1-(naphthalen-2-ylmethyl)pyridin-1-ium) iodide (p-N-DPC·I2) with ratiometric luminescent colorimetric dual-mode responses toward EDA, endowing sensitive selective detection method for real-time monitoring. The experimental theoretical calculation results revealed that the response mechanism was forming charge transfer (CT) state when p-N-DPC·I2 met EDA. In addition, hydrogel-based sensing chip developed achieve ultrasensitive recognition vapor naked eye at concentration low 10 ppm. This study new fluorescent modes detect both solution vapor.

Язык: Английский

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Band-gap-tunable carbon quantum dots for surface-enhanced Raman scattering

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Фев. 13, 2025

Carbon quantum dots (CQDs) with photoluminescence properties have been widely recognized, however, their inherent surface-enhanced Raman scattering (SERS) activity is rare reported. Herein, we propose a type of band-gap-tunable CQDs derived from metal-phenolic network (MPN) that exhibits excellent SERS performance. MPN-CQDs may be the ideal nonmetallic substrates to accurately elucidate chemical mechanism (CM) due simply controllable bandgap structure. By screening doped metal elements MPN, can realize optimal effect maximum enhancement factor 5.5×10⁴, also exhibit outstanding reproducibility and stability. We then systematically disclose interfacial photo-induced charge transfer process corresponding migration pathways between analyte. This class finally applied for detection hemoglobin high sensitivity; further combined machine learning algorithm, successfully achieved precise identification heterogeneity hemoglobin. first evidence tunable performance in CQDs, which offers facile avenue in-depth understanding CM materials.

Язык: Английский

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A novel salicylaldehyde Schiff-base-functionalized 1,8-naphthalimide luminophore with controllable aggregation/solid/film fluorescence and reversible acid/base stimuli-responsive film fluorescence

Journal of Molecular Structure, Год журнала: 2025, Номер unknown, С. 141888 - 141888

Опубликована: Фев. 1, 2025

Язык: Английский

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Glass-confined carbon dots: transparent afterglow materials with switchable TADF and RTP

Nanoscale, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

The confined synthesis of carbon dots (CDs) in solid matrixes is a promising avenue for developing new afterglow materials.

Язык: Английский

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Photoresponsive Behavior of Triphenylamine‐Based Organic Small Molecule Emitters Involving a Photo‐Induced Charge‐Transfer Complexation Mechanism under UV Light

Chinese Journal of Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Март 20, 2025

Comprehensive Summary Stimuli‐responsive organic luminescent materials exhibit significant sensitivity to various external stimuli, among which their excellent photosensitivity is particularly prominent. This unique feature gives them great potential for applications. Herein, five small molecule emitters based on triphenylamine derivatives have been synthesized via Suzuki‐coupling reaction. These molecules fluorescence properties with quantum yields ( Φ ) all reaching over 90%. When irradiated a 365 nm UV lamp, interesting photochromic phenomena occurred in chloroform solutions. phenomenon has studied intensively by UV‐vis absorption and spectroscopy, EPR measurements, density functional theory calculations, finally, the group was used as photoinitiation precursor electron donor, photo‐induced charge transfer complex (PCTC) initiated donor successfully constructed.

Язык: Английский

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Acid-base interaction modulating the pH responsiveness of fluorescent carbon nanoparticles for time-resolved information encryption and anti-counterfeiting

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161778 - 161778

Опубликована: Март 1, 2025

Язык: Английский

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Pyridine‐Based Rigidochromic Fluorescent Security Ink

Chinese Journal of Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Март 21, 2025

Comprehensive Summary Traditional fluorescent probes typically display blueshifted emission in rigidifying media; however, a newly developed class of rigidochromic fluorophores derived from phenanthridine demonstrates remarkable redshifted under similar conditions. Pyridine, with N‐heterostructure to those group, is considered promising candidate for achieving comparable rigidity‐induced redshift behavior. In this work, we synthesized eight organic featuring diverse functional units and substitutes by systematically combining pyridine carbazole, triazatruxene (TAT), tetraphenylethylene (TPE), respectively. These molecules exhibit significant redshifts (up 225 nm, record high value ever reported) or notable intensity changes as the rigidity polymer matrix increases, along unique acid responsiveness. The differences polar‐π interactions between polymers diversify behavior, advancing development secure printing intelligent optical materials. By embedding these into films helical phase structures, tunable chirality was achieved. Notably, leveraging acid‐responsive properties fluorophores, time‐dependent light‐controlled dynamic encryption system constructed, successfully enabling multi‐level information encryption. This research greatly expands scope their applications anti‐counterfeiting storage.

Язык: Английский

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Visual Engineering Achieved with Electronegative Carbon Dots for Highly Efficient Ion Flux Regulation

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 30, 2025

Abstract Various modification methods for lithium‐metal battery separators have been well explored in the past decades, among which most common process is to coat modified slurries onto by blade‐coating method. However, distribution of often non‐uniform this process, while uniformity usually needs be detected electron microscope, time and cost‐consuming. To solve long‐standing technical issue, it focuses on “visualization” effect with negatively charged carbon dots under UV light, deeply investigates ion transport problem caused material modification. With unique “visual engineering” strategy, uniform separator can easily detected, further allows construction a negative shielding layer cation channels. It accelerates realizes stable Li stripping deposition avoids dendrite growth. end, symmetric batteries different electrolyte compositions, operation 1200 h achieved. In addition, polysulfide shuttles greatly suppressed, thus avoiding infamous “shuttle effect” lithium–sulfur batteries. This work provides new avenue screening well‐modified through engineering”, accelerating practical application series rechargeable

Язык: Английский

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Scalable Synthesis of Self-Assembling Monodisperse Phosphorescent Nanospheres Enabling Multi-Mode Angle-Dependent and Thermal-Responsive Photonic Gels

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Апрель 7, 2025

Developing room-temperature phosphorescent (RTP) materials with microscale periodic structures presents a promising prospect for future optical applications but remains extremely challenging due to the complex integration of luminescent and structural components. Herein, we present an emerging strategy mass-producing monodisperse RTP silica nanospheres (RTP SiO₂ NPs) using modified Stöber method, where organic molecules are embedded in networks undergone situ carbonization, aggregation crystallization form carbon dots under high temperature calcination. These NPs can self-assemble into photonic crystal (PC) structures, enabling straightforward color, fluorescence (FL) achieve multimodal properties. The angle-dependent bandgap (PBG) generated by physical structure modulates light propagation PC gel, creating unique FL chromatic responses. Temperature-induced refractive index changes between liquid matrix further enable dynamic control scattering states, significantly altering transmittance emission intensities RTP. This successful fusion chemical luminescence offers new approach constructing advanced devices.

Язык: Английский

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