Effectively regulation of the ESIPT process via ring-annelation modification for schiff base derivatives: A theoretical study

Dyes and Pigments, Год журнала: 2024, Номер 224, С. 112020 - 112020

Опубликована: Фев. 6, 2024

Язык: Английский

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Dynamic response and discrimination of gaseous sarin using a boron‐difluoride complex film‐based fluorescence sensor

Aggregate, Год журнала: 2024, Номер unknown

Опубликована: Июль 3, 2024

Abstract This study presents a novel boron‐difluoride complex‐based fluorescent nanofilm sensor capable of detecting sarin vapors in the environment by reporting an output fluorescence signal. The sensor's evaluation demonstrated exceptionally low detection limit for vapor, even presence various interfering gases, with theoretical and practical limits 0.7 1 ppb, respectively. featured rapid response time (less than 2 s), broad linear range (1 ppb–1000 ppm), superior selectivity vapor over group analytes, outperforming existing sensors. Mechanistic indicates that heightened sensitivity to is due robust affinity nitrogen atoms within core BODIQ unit sarin. Additionally, tetraphenylethylene structure steric hindrance effectively inhibits tight packing derivatives, forms numerous microporous structures self‐assembled nanofilm, which are beneficial mass transfer, enhancing efficiency vapors. Furthermore, we have achieved differentiation sarin, diethyl chlorophosphate, HCl through analysis sensing kinetic. opens new avenues sustainable, low‐cost, environment‐friendly portable devices, as well environmental monitoring tracking applications.

Язык: Английский

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Novel Photocatalyst Based on Through‐Space Charge Transfer Induced Intersystem Crossing Enables Rapid and Efficient Polymerization Under Low‐Power Excitation Light

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(29)

Опубликована: Апрель 8, 2024

Abstract Currently, most photoredox catalysis polymerization systems are limited by high excitation power, long time, or the requirement of electron donors due to precise design efficient photocatalysts still poses a great challenge. Herein, we propose new approach: creation having low ground state oxidation potentials and excited energy levels, along with through‐space charge transfer (TSCT) induced intersystem crossing (ISC) properties. A cabazole‐naphthalimide (NI) dyad (NI‐1) characterized triplet lifetime (τ T =62 μs), satisfactory ISC efficiency (Φ Δ =54.3 %) powerful reduction capacity [Singlet: E 1/2 (PC +1 /*PC)=−1.93 eV, Triplet: /*PC)=−0.84 eV] was obtained. An rapid (83 % conversion 1 mM monomer in 30 s) observed under conditions without donor, power (10 mW cm −2 ) catalyst loading (<50 μM). In contrast, rate lower at 29 when reference (NI‐4) used for photopolymerization same conditions, demonstrating advantage TSCT photocatalyst. Finally, material as photocatalyst practical lithography first achieving pattern resolutions up 10 μm.

Язык: Английский

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A Hot Exciton Luminogen Constructed by an o‐Carborane Scaffold

Advanced Optical Materials, Год журнала: 2024, Номер 12(23)

Опубликована: Май 21, 2024

Abstract Emitters with the combination of an electron donor (D) and acceptor (A) have been widely studied usually exhibited interesting photophysical properties. Hot exciton materials involving ordinary D‐A structure typically undergo a hybridized local charge transfer (HLCT) process. However, hot molecules containing more D/A fragments are much less explored. In this study, new material based on inorganic boron cluster is designed synthesized, which possesses V‐type D–A–A′–D′ molecular architecture. The emitter shows impressive photoluminescence quantum yield (PLQY) up to 90% demonstrates multiple emissions, excitation‐wavelength‐, solvent‐, temperature‐dependent emissions. These characteristics attributed coexistence HLCT through‐space process (TSTC) triggered by o ‐carborane scaffold in excited state. Besides, interchangeable HLCT/TSCT/hRISC processes demonstrated spectra femtosecond time‐resolved transient absorption spectra. findings confirm novel mechanism, simultaneously induced TSCT. This also first example carborane‐based molecule. current study not only reports architecture for but gives rise insight into mechanism.

Язык: Английский

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Multi‐Stimuli‐Responsive Circularly Polarized Luminescence with Handedness Inversion and Near‐Infrared Phosphorescence in Chiral Metal‐Organic Framework Platform for White Light Emission and Information Encryption

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Март 17, 2025

Abstract Preparing multi‐color and multi‐stimuli‐responsive circularly polarized luminescence (CPL) materials understanding the evolution of chirality through visualized mode is still a challenge. Here, an encapsulation engineering approach chiral metal‐organic frameworks (MOFs) proposed to confine guest emitters realize CPL. Based on triplet‐triplet energy transfer (TTET), white CPL near‐infrared room temperature phosphorescence (NIR‐CPRTP) can be obtained by introducing pyrene derivatives. With introduction containing vinylpyrene group, light‐ thermal‐responsive with signal inversion realized reversible [2+2] cycloaddition reaction between ligand triggered visible light/ultraviolet light or heating. Furthermore, excitation‐dependent successfully achieved incorporation excited state intramolecular proton (ESIPT) molecules into nanopores. Importantly, magnification greatly enhanced spatial confinement, accurate host‐guest single crystal structures FLT@DCF‐12 FLT@LCF‐12 provide understand mechanism transfer, amplification responsiveness. White LED multiple information display encryption are further demonstrated. This breakthrough provides new perspective guest‐encapsulated MOFs contributes construction stimuli‐responsive CPL‐active materials.

Язык: Английский

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Unraveling an excited state intramolecular double proton transfer pathway in 2,5-bis(benzoxazole-2-yl)benzene-1,4-diol derivatives

Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, Год журнала: 2025, Номер unknown, С. 126109 - 126109

Опубликована: Март 1, 2025

Язык: Английский

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Theoretical study on the cascaded double proton transfer mechanism involving two adjacent hydrogen bonds in conjugated organic molecules

Journal of Luminescence, Год журнала: 2024, Номер 276, С. 120861 - 120861

Опубликована: Авг. 19, 2024

Язык: Английский

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Anion-induced opposite mechanochromic and thermochromic emission directions of protonated hydrazones

Science China Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 4, 2024

Язык: Английский

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A ratiometric fluorescent indicator-displacement assay for on-site determination and intracellular imaging of nitroxinil

Food Chemistry, Год журнала: 2023, Номер 435, С. 137617 - 137617

Опубликована: Сен. 30, 2023

Язык: Английский

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Fast and Selective Luminescent Sensing by Langmuir–Schaeffer Films Based on Controlled Assembly of Perylene Bisimide Modified with A Cyclometalated Au^III Complex

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(52)

Опубликована: Ноя. 15, 2023

Condensed films of functional luminophores dominated by the magnitude and dimensionality intermolecular interactions play important roles in sensing performance. However, controlling molecular assembly regulating photophysical properties remain challenging. In this study, a new luminophore, ortho-PBI-Au, was synthesized anchoring cyclometalated alkynyl-gold(III) unit at ortho-position perylene bisimide. An unprecedented T-type packing model driven weak Au-π interaction Au-H bonds observed, laying foundation for striking luminophore. Controlled ortho-PBI-Au air-water interface, realized using classical Langmuir-Schaeffer technique, afforded obtained luminescent with different structures. With an optimized film, sensitive, selective, rapid detection hazardous psychoactive substance, phenylethylamine (PEA), achieved. The limit, response time, recovery time were <4 ppb, <1 s, <5 respectively, surpassing performance PEA sensors known thus far. relationship between characters systematically examined grey relational analysis (GRA). present study suggests that designing novel aggregation definite adlayer structure is crucial strategy to enhance performance, which could be favorable film-based fluorescent sensors.

Язык: Английский

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