Photooxidation triggered ultralong afterglow in carbon nanodots DOI Creative Commons

Guangsong Zheng,

Cheng‐Long Shen, Chunyao Niu

et al.

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

Published: March 15, 2024

Abstract It remains a challenge to obtain biocompatible afterglow materials with long emission wavelengths, durable lifetimes, and good water solubility. Herein we develop photooxidation strategy construct near-infrared carbon nanodots an extra-long lifetime of up 5.9 h, comparable that the well-known rare-earth or organic long-persistent luminescent materials. Intriguingly, size-dependent evolution from 3.4 h has been observed systems in aqueous solution. With structural/ultrafast dynamics analysis density functional theory simulations, reveal persistent luminescence is activated by photooxidation-induced dioxetane intermediate, which can slowly release convert energy into luminous via steric hindrance effect nanoparticles. luminescence, tissue penetration depth 20 mm be achieved. Thanks high signal-to-background ratio, biological safety cancer-specific targeting ability nanodots, ultralong-afterglow guided surgery successfully performed on mice model remove tumor tissues accurately, demonstrating potential clinical applications. These results may facilitate development long-lasting for precision resection.

Language: Английский

A multifunctional chemical toolbox to engineer carbon dots for biomedical and energy applications DOI
Luka Đorđević∞, Francesca Arcudi, Michele Cacioppo

et al.

Nature Nanotechnology, Journal Year: 2022, Volume and Issue: 17(2), P. 112 - 130

Published: Feb. 1, 2022

Language: Английский

Citations

668
Carbon Dots in Bioimaging, Biosensing and Therapeutics: A Comprehensive Review DOI Creative Commons
Boyang Wang,

Huijuan Cai,

Geoffrey I. N. Waterhouse

et al.

Small Science, Journal Year: 2022, Volume and Issue: 2(6)

Published: May 8, 2022

Carbon dots (CDs), comprising crystalline graphitized carbon cores and polymer surface groups, are currently attracting a lot of interest in biological fields owing to their fluorescent properties, high photostability, biocompatibility low toxicity. In addition, the easy preparation functionalization CDs stimulate development CDs‐based composite materials with specific functions. Presently, applications growing at remarkable speed, justifying need for up‐to‐date review articles that capture recent progress this blossoming field. review, breakthroughs synthesis, modification, optical toxicology biocatalytic platforms described. Further, research related bioimaging, biosensing, drug delivery, antibacterial, anticancer (photothermal therapy, photodynamic therapy synergistic therapy) antiviral therapies involving discussed detail. Finally, perspective on prospects challenges biomedicine biotechnology is provided.

Language: Английский

Citations

237
Recent advances in the design of afterglow materials: mechanisms, structural regulation strategies and applications DOI
Xin Yang, Geoffrey I. N. Waterhouse, Siyu Lu

et al.

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(22), P. 8005 - 8058

Published: Jan. 1, 2023

Afterglow materials have attracted widespread attention owing to their distinctive and long-lived optical emission properties which create exciting opportunities in various fields.

Language: Английский

Citations

168
Supramolecular glasses with color-tunable circularly polarized afterglow through evaporation-induced self-assembly of chiral metal–organic complexes DOI Creative Commons

Fei Nie,

Ke‐Zhi Wang, Dongpeng Yan

et al.

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

Published: March 24, 2023

The fabrication of chiral molecules into macroscopic systems has many valuable applications, especially in the fields optical displays, data encryption, information storage, and so on. Here, we design prepare a serious supramolecular glasses (SGs) based on Zn-L-Histidine complexes, via an evaporation-induced self-assembly (EISA) strategy. Metal-ligand interactions between zinc(II) ion L-Histidine endow SGs with interesting circularly polarized afterglow (CPA). Multicolored CPA emissions from blue to red dissymmetry factor as high 9.5 × 10-3 excited-state lifetime up 356.7 ms are achieved under ambient conditions. Therefore, this work not only communicates bulk wide-tunable large circular polarization, but also provides EISA method for metal-organic hybrids toward photonic applications.

Language: Английский

Citations

133
A Molecular Engineering Strategy for Achieving Blue Phosphorescent Carbon Dots with Outstanding Efficiency above 50% DOI

Zhijiang Song,

Yuan Shang, Qing Lou

et al.

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(6)

Published: Nov. 22, 2022

Highly efficient emission has been a long-lasting pursuit for carbon dots (CDs) owing to their enormous potential in optoelectronic applications. Nevertheless, room-temperature phosphorescence (RTP) performance still largely lags behind outstanding fluorescence emission, especially the blue spectral region. Herein, high-efficiency RTP CDs have designed and constructed via simple molecular engineering strategy, enabling with an unprecedented quantum efficiency of 50.17% long lifetime 2.03 s. This treating route facilitates formation high-density (n, π*) configurations CD π-π conjugate system through introduction abundant functional groups, which can evoke strong spin-orbit coupling further promote intersystem crossing from singlet triplet excited states radiative recombination ground state. With phosphorescent as donors, green, red, white afterglow composites are successfully fabricated effective Förster resonance energy transfer. Importantly, color temperature be widely facilely tuned cool pure warm white. Moreover, advanced information encryption, light illumination, afterglow/dynamic visual display demonstrated when using these multicolor-emitting CD-based systems.

Language: Английский

Citations

118
Thermally Enhanced and Long Lifetime Red TADF Carbon Dots via Multi‐Confinement and Phosphorescence Assisted Energy Transfer DOI
Qing Lou, Chen Niu,

Jinyang Zhu

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(20)

Published: March 9, 2023

Thermally activated delayed fluorescence (TADF) materials, which can harvest both singlet and triplet excitons for high-efficiency emission, have attracted widespread concern their enormous applications. Nevertheless, luminescence thermal quenching severely limits the efficiency operating stability in TADF materials devices at high temperature. Herein, a surface engineering strategy is adopted to obtain unique carbon dots (CDs)-based thermally enhanced with ≈250% enhancement from 273 343 K via incorporating seed CDs into ionic crystal network. The rigid network simultaneously boost reverse intersystem crossing process enhancing spin-orbit coupling between states suppressing non-radiative transition rate, contributing character. Benefiting efficient energy transfer of phosphorescence center CDs, emission ≈600 nm displays long lifetime up 109.6 ms, outperforming other red organic materials. Thanks variable decay rates centers, time temperature-dependent color has been first realized CDs-based time-/temperature-dependent one material system offer new opportunities information protection processing.

Language: Английский

Citations

115
Phosphorescence resonance energy transfer from purely organic supramolecular assembly DOI
Xianyin Dai,

Man Huo,

Yu Liu

et al.

Nature Reviews Chemistry, Journal Year: 2023, Volume and Issue: 7(12), P. 854 - 874

Published: Nov. 22, 2023

Language: Английский

Citations

102
Noncovalent Polymerization‐Activated Ultrastrong Near‐Infrared Room‐Temperature Phosphorescence Energy Transfer Assembly in Aqueous Solution DOI
Xianyin Dai,

Man Huo,

Xiaoyun Dong

et al.

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(38)

Published: June 30, 2022

Noncovalent macrocycle-confined supramolecular purely organic room-temperature phosphorescence (RTP) is a current research hotspot. Herein, high-efficiency noncovalent polymerization-activated near-infrared (NIR)-emissive RTP-harvesting system in aqueous solution based on the stepwise confinement of cucurbit[7]uril (CB[7]) and β-cyclodextrin-grafted hyaluronic acid (HACD), reported. Compared with dodecyl-chain-bridged 6-bromoisoquinoline derivative (G), dumbbell-shaped assembly G⊂CB[7] presents an appeared complexation-induced RTP signal at 540 nm via first CB[7]. Subsequently, benefitting from encapsulation β-cyclodextrin cavity, subsequent polymerization binary enabled by HACD can contribute to further-enhanced emission intensity approximately eight times addition increased lifetime 59.0 µs 0.581 ms. Moreover, upon doping small amount two types dyes, Nile blue or tetrakis(4-sulfophenyl)porphyrin as acceptor into @ HACD, efficient energy transfer occurs accompanied long-lived NIR-emitting performance (680 710 nm) high donor/acceptor ratio. Intriguingly, prepared successfully applied for targeted NIR imaging living tumor cells utilizing targeting ability acid, which provides new strategy create advanced water-soluble phosphorescent materials.

Language: Английский

Citations

91
Carbon Dots in Hydroxy Fluorides: Achieving Multicolor Long-Wavelength Room-Temperature Phosphorescence and Excellent Stability via Crystal Confinement DOI

Ping Liang,

Yihao Zheng, Xingcai Zhang

et al.

Nano Letters, Journal Year: 2022, Volume and Issue: 22(13), P. 5127 - 5136

Published: June 14, 2022

Carbon dots (CDs) have aroused widespread interest in the construction of room-temperature phosphorescent (RTP) materials. However, it is a great challenge to obtain simultaneous multicolor long-wavelength RTP emission and excellent stability CD-based Herein, novel universal "CDs-in-YOHF" strategy proposed generate by confining various CDs Y(OH)xF3–x (YOHF) matrix. The mechanism triplet related space confinement, formation hydrogen bonds C–F bonds, electron-withdrawing fluorine atoms. Remarkably, lifetime orange-emissive CDs-o@YOHF longest among reported single-CD-matrix composites for above 570 nm. Furthermore, exhibited higher performance at long wavelength comparison CDs-o@matrix (matrix = PVA, PU, urea, silica). resulting CDs@YOHF shows photostability, thermostability, chemical stability, temporal which rather favorable information security, especially complex environment.

Language: Английский

Citations

79
Brighten Triplet Excitons of Carbon Nanodots for Multicolor Phosphorescence Films DOI
Qing Cao, Kai-Kai Liu,

Ya‐Chuan Liang

et al.

Nano Letters, Journal Year: 2022, Volume and Issue: 22(10), P. 4097 - 4105

Published: May 10, 2022

Triplet excitons usually do not emit light under ambient conditions due to the spin-forbidden transition rule, thus they are called dark excitons. Herein, triplet in carbon nanodots (CNDs) brightened by embedding CNDs into poly(vinyl alcohol) (PVA) films; flexible multicolor phosphorescence films demonstrated. PVA chains can isolate CNDs, and excited state electron or energy transfer induced exciton quenching is reduced; while formed hydrogen bonds between restrict vibration/rotation of further protecting from nonradiative recombination. The lifetimes reach 567, 1387, 726, 311 ms, longest-lasting film be observed naked eyes for nearly 15 s even after bending 5000 times. processed various patterns, a dynamic optical signature concept has been proposed demonstrated based on films.

Language: Английский

Citations

74