Aggregation behaviour of pyrene-based luminescent materials, from molecular design and optical properties to application

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(19), P. 6715 - 6753

Published: Jan. 1, 2023

This review not only highlights the progress of emission and electronic behaviour new pyrene-based luminescence molecules in aggregated state, but also provides a perspective for understanding mechanism optoelectronic properties pyrenes.

Language: Английский

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Secondary through-space interactions facilitated single-molecule white-light emission from clusteroluminogens

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: June 17, 2022

Clusteroluminogens refer to some non-conjugated molecules that show visible light and unique electronic properties with through-space interactions due the formation of aggregates. Although mature systematic theories molecular photophysics have been developed study conventional conjugated chromophores, it is still challenging endow clusteroluminogens designed photophysical by manipulating interactions. Herein, three donor-acceptor structures different halide substituents are synthesized. These compounds multiple emissions even single-molecule white-light emission in crystalline state. The intensity ratio these easily manipulated changing atom excitation wavelength. Experimental theoretical results successfully disclose nature emissions: conjugation for short-wavelength fluorescence, charge transfer based on secondary long-wavelength room-temperature phosphorescence. introduction not only enriches their varieties but also inspires establishment novel aggregate clusteroluminescence.

Language: Английский

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A Dihydroazulene‐Based Photofluorochromic AIE System for Rewritable 4D Information Encryption

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(37)

Published: July 16, 2022

Dynamic patterns based on luminescent materials play an essential role in the digital age. However, it is still challenging to develop highly emissive photofluorochromic with dynamic behaviors store information multiple characteristics. Here, we report a series of dihydroazulene-based compounds which show typical aggregation-induced emission (AIE) effect. Moreover, photo-switching ability dihydroazulene units, undergoing light-induced ring-opening, enables properties. The photofluorochromism also shows quantitively described responses time and temperature via reverse ring-closing process. Ultimately, rewritable 4D system, embedded quick response code, dot matrix microstructures, color fluorescence, time/temperature-dependent intensity change, established patterns. This work not only develops AIE skeleton properties but provides new strategy for encryption cybernetics.

Language: Английский

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How the Length of Through‐Space Conjugation Influences the Clusteroluminescence of Oligo(Phenylene Methylene)s

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

Published: Jan. 2, 2024

The length and mode of conjugation directly affect the molecular electronic structure, which has been extensively studied in through-bond (TBC) systems. Corresponding research greatly promotes development TBC-based luminophores. However, how through-space (TSC), one kind weak interaction, influence photophysical properties non-conjugated luminophores remains a relatively unexplored field. Here, we unveil non-linear relationship between TSC emission characteristics systems, contrast to reported proportional correlation TBC More specifically, oligo(phenylene methylene)s (OPM[4]-OPM[7]) exhibit stronger prominent blue clusteroluminescence (CL) (≈440 nm) compared shorter counterparts (OPM[2] OPM[3]). OPM[6] demonstrates highest solid-state quantum yield (40 %), emphasizing importance balancing flexibility rigidity. Further theoretical calculations confirmed that CL these was determined by stable derived from inner rigid Diphenylmethane (DPM) segments within oligomers instead outer ones. This discovery challenges previous assumptions adds new dimension understanding TSC-based

Language: Английский

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Acceptor engineering of quinone-based cycloparaphenylenes via post-synthesis for achieving white-light emission in single-molecule

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 7, 2025

Developing donor-acceptor [n]cycloparaphenylenes (D-A [n]CPPs) with multiple emissions from different emissive states remains challenging yet crucial for achieving white-light emission in single-molecule. Here, we report our explorations into acceptor engineering of quinone-based D-A [10]CPPs (Nq/Aq/Tq[10]CPPs) via a post-lateral annulation using Diels-Alder reactions oxTh[10]CPP. X-ray analysis reveals that Nq[10]CPP displays side by packing naphthoquione stacking while Aq[10]CPP adopts an intercalated conformation through anthraquinone interaction. Fluorescence investigations reveal the display distinctive acceptor-dependent dual-emission both locally excited state and charge transfer after single-wavelength excitation organic solvents, consequently leading to multicolor emissions, particular, CHCl3 Aq[10]CPP. In THF/water mixture, oxTh[10]CPP wide range fluorescence including as increasing fraction water, accompanying formation nanoparticles demonstrated Tyndall effect SEM. Interestingly, can be switched white blue upon redox. Our demonstrate not only endows two distint but also highlights effective post-synthetic strategy functionalizing CPP nanohoops desirable properties. authors yield emission.

Language: Английский

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Tunable ultralong multicolor and near-infrared emission from polyacrylic acid-based room temperature phosphorescence materials by FRET

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 469, P. 143931 - 143931

Published: June 5, 2023

Language: Английский

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Regulating the proximity effect of heterocycle-containing AIEgens

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: June 24, 2023

Abstract Proximity effect, which refers to the low-lying ( n ,π*) and (π,π*) states with close energy levels, usually plays a negative role in luminescent behaviors of heterocyclic luminogens. However, no systematic study attempts reveal manipulate proximity effect on properties. Here, we report series methylquinoxaline derivatives different electron-donating groups, show photophysical properties aggregation-induced emission behaviors. Experimental results theoretical calculation gradually changed levels coupling effects closely related states, intrinsically regulate these With intrinsic nature heterocycle-containing compounds, they are utilized for sensors information encryption dynamic responses acid/base stimuli. This work reveals both positive impacts systems provides perspective develop functional responsive luminogens

Language: Английский

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Narrowband clusteroluminescence with 100% quantum yield enabled by through-space conjugation of asymmetric conformation

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: July 30, 2024

Different from traditional organic luminescent materials based on covalent delocalization, clusteroluminescence nonconjugated luminogens relies noncovalent through-space conjugation of electrons. However, such spatial electron delocalization is usually weak, resulting in low efficiency and board emission peak due to multiple vibrational energy levels. Herein, several are constructed by employing biphenyl as the building unit reveal structure-property relationship solve current challenges. The intramolecular can be gradually strengthened introducing units stabilized rigid molecular skeleton intermolecular interactions. Surprisingly, narrowband with full width at half-maximum 40 nm 100% successfully achieved via an asymmetric conformation, exhibiting comparable performance conjugated luminogens. This work realizes highly efficient highlights essential role structural conformation manipulating photophysical properties unconventional materials.

Language: Английский

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Novel Supramolecular Artificial Light-Harvesting Systems Based on AIE-active Macrocycle for Efficient White-Light Photocatalysis in Water

Chemical Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

A novel rigid macrocycle with aggregation-induced emission (AIE) properties was facilely synthesized to construct efficient artificial light-harvesting systems for photocatalysis through the Förster resonance energy transfer process.

Language: Английский

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Supra‐Fluorophores: Ultrabright Fluorescent Supramolecular Assemblies Derived from Conventional Fluorophores in Water

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(25)

Published: Feb. 28, 2024

Abstract Fluorescent organic nanoparticles (NPs) with exceptional brightness hold significant promise for demanding fluorescence bioimaging applications. Although considerable efforts are invested in developing novel dyes enhanced performance, augmenting the of conventional fluorophores is still one biggest challenges to overcome. This study presents a supramolecular strategy constructing ultrabright fluorescent aqueous media (referred as “Supra‐fluorophores”) derived from fluorophores. To achieve this, this course has employed cylindrical nanoparticle hydrophobic microdomain, assembled by cyclic peptide‐diblock copolymer conjugate water, scaffold. The noncovalent dispersion fluorophore moieties within microdomain scaffold effectively mitigates undesired aggregation‐caused quenching and resulting NPs high brightness. applicable broad spectrum families, covering polyaromatic hydrocarbons, coumarins, boron‐dipyrromethenes, cyanines, xanthenes, squaraines. demonstrate quantum yield (>30%) per volume (as 12 060 m −1 cm nm −3 ). Moreover, high‐performance emission NIR region constructed, showcasing up 20‐fold increase both photostability. Supra‐fluorophore offers versatile effective method transforming existing into environments, applications such bioimaging.

Language: Английский

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