Pure Organic Thermally Activated Delayed Fluorescence Afterglow Polymers via Dopant Isomerization DOI
Guanyu Liu, Zhi‐Ping Yan, Q. Wang Song

et al.

ACS Macro Letters, Journal Year: 2025, Volume and Issue: unknown, P. 265 - 271

Published: Feb. 13, 2025

N-(o-Cyanophenyl)carbazole can be dimerized at different positions, which may change excited state behaviors. Herein, 2,3′-dicyano-3,4′-di(carbazol-9-yl)biphenyl (D34C) is designed and synthesized doped into polymers. However, we find that D34C does not exhibit room temperature phosphorescence but emits fluorescence (FL) bright thermally activated delayed (TADF) with lifetimes of hundreds milliseconds, observed in diverse matrices such as PMMA, MBS, ABS, PS, HIPS, SIS. The simple positional isomerization makes the abundant triplet excitons undergo only reverse intersystem crossing rather than (RTP) radiation, rare organic Since production TADF afterglow requires a certain excitation time, generally indistinguishable FL efficiencies are separated for first time. This work provides novel polymers mechanical properties also will evoke subtle design conjugated molecules to dramatically photoexcitation emission

Language: Английский

Long-lived dynamic room temperature phosphorescent carbon dots for advanced sensing and bioimaging applications DOI
Taotao Li, Nan Zhang,

Shan Zhao

et al.

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 516, P. 215987 - 215987

Published: May 31, 2024

Language: Английский

Citations

25
Excellent Persistent Near‐Infrared Room Temperature Phosphorescence from Highly Efficient Host–Guest Systems DOI Creative Commons

Shu-Hui Li,

Juqing Gu,

Jiaqiang Wang

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 11(28)

Published: May 17, 2024

Abstract Organic near‐infrared (NIR) room temperature phosphorescence (RTP) materials become a hot topic in bioimaging and biosensing for the large penetration depth high signal‐to‐background ratio (SBR). However, it is challenging to achieve persistent NIR severe nonradiative transitions by energy‐gap law. Herein, universal system with RTP built visible (host) (guest) materials, which can efficiently suppress rigid environment of crystalline host good matching, further promote emission additional resonance energy transfer (≈100%) between them. The ten‐folds enhancement lifetimes, compared those guest luminogens, be achieved modulation aggregated structures host–guest systems. This work provides convenient way largely prolong lifetimes various promoting their application afterglow imaging deeper higher SBRs.

Language: Английский

Citations

16
A new nanomaterial - carbonized polymer dots and their applications: A review DOI
Xiaoyu Li,

Chunyuan Kang,

Songyuan Tao

et al.

Carbon, Journal Year: 2025, Volume and Issue: unknown, P. 120122 - 120122

Published: Feb. 1, 2025

Language: Английский

Citations

2
Activatable Janus Nanoparticles for Precise NIR‐II Bioimaging and Synergistic Cancer Therapy DOI

Jiasheng Bao,

Ruiqi Liu,

Zhouyu Yu

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(27)

Published: Feb. 25, 2024

Abstract Despite multifunctional theranostics hold vast potential in deep tissue bioimaging and tumor therapy, activatable nanomedicine with integration of precise diagnosis effective treatment is usually achieved at the cost complicated synthesis chemistries. Here, a facile way to design bioresponsive Ag 2 S‐Ag Janus probes coated by polyethylene glycol (PEG) (denoted as AAP) showed, active second near‐infrared window (NIR‐II, 1000–1700 nm). In microenvironment, part can yield hydroxyl radicals (·OH) consuming H O for high‐efficiency chemodynamic therapy (CDT), while S has impressive photothermal (PTT). The synergistic benefits from parts further boosted CDT effect AAP high conversion efficiency up 56.8%. Moreover, multiple lines evidence supported that extremely faint fluorescence be significantly activated overexpressed levels , showing bright NIR‐II emission ≈1270 nm over 5.6 × 10 3 ‐fold increase signal intensity. are easily imaging tumor‐specific identification, effectively ablate tissues inhibition rate 96.2%. This study expects probe will open new route achieve window.

Language: Английский

Citations

12
Near-Infrared-II Fluorescent Probes for Analytical Applications: From In Vitro Detection to In Vivo Imaging Monitoring DOI

Sha Liu,

Wenjun Dong, H.-J. Gao

et al.

Accounts of Chemical Research, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

ConspectusBiomarkers play a vital role in the regulation of life processes, especially predicting occurrence and development diseases. For early diagnosis precise treatment diseases, it has become necessary significant to detect biomarkers with sensitivity, accuracy, simplicity, convenience, even visualization. Fluorescent-probe-based techniques have been recognized as one most powerful tools for sensitive detection real time imaging biological samples. However, traditional optical probes, mainly including visible probes (400–700 nm) near-infrared I (NIR-I, 700–900 suffer from low poor resolution, strong absorption scattering, high background fluorescence, which hinder effective monitoring biomarkers.Fortunately, past decade witnessed remarkable evolution application fields II (NIR-II, 900–1700 driven by its exceptional characteristics advancement technologies. Leveraging superior penetration capabilities, negligible autofluorescence, extended fluorescence emission wavelengths, NIR-II fluorescent significantly enhance signal-to-noise ratio (SNR) vitro (IVD) temporal resolution vivo imaging. Our team committed design strategy, controlled synthesis, luminous mechanisms, biomedical applications probes. In this Account, we present representative works recent years our group field analytical applications, ranging different various also will further provide general overview First, are fully summarized, tumor marker detection, virus bacteria analysis, cell testing, small-molecule sensing. Second, adequately discussed, ROS gas monitoring, pH sensing, receptor some serious Finally, outline advantages discuss detail challenges well their future development. There is reasonable prospect that technology based on exhibit great potential research clinical disease diagnosis. We hope Account can expand reach into an broader spectrum fields, enhancing impact scientific discovery medical practice.

Language: Английский

Citations

1
Linearly Arranged Multi‐π‐Stacked Structure for Efficient Through‐Space Charge‐Transfer Emitters DOI
Yang‐Kun Qu, Dong‐Ying Zhou, Qi Zheng

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(38)

Published: July 4, 2024

Noncovalent spatial interaction has become an intriguing and important tool for constructing optoelectronic molecules. In this study, we linearly attached three conjugated units in a multi π-stacked manner by using just one trident bridge based on indeno[2,1-b]fluorene. To achieve structure, improved the synthetic approach through double C-H activation, significantly simplifying preparation process. Due to proximity of C10, C11, C12 sites indeno[2,1-b]fluorene, derived two novel donor|acceptor|donor (D|A|D) type molecules, 2DMB 2DMFB, which exhibited closely packed intramolecular stacking, enabling efficient through-space charge transfer. This molecular construction is particularly suitable developing high-performance thermally activated delayed fluorescence materials. With donor(s) acceptor(s) constrained separated within spatially rigid elevated radiative transition rates, high photoluminescence quantum yields were achieved. Organic light-emitting diodes incorporating 2DMFB demonstrated superior efficiency, achieving maximum external efficiencies 28.6 % 16.2 %, respectively.

Language: Английский

Citations

8
Harnessing triplet excitons: Advances in luminescence metal coordination compounds DOI

Lin Geng,

Rui Sun, Da‐Shuai Zhang

et al.

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 518, P. 216066 - 216066

Published: July 15, 2024

Language: Английский

Citations

8
Ultralong Blue Organic Room‐Temperature Phosphorescence Promoted by Green Assembly DOI
Zhongyuan Chen, Zhaojun Chen, Yuqi Zhu

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(46)

Published: July 9, 2024

Abstract In recent years, there is a growing interest in developing ultralong organic room‐temperature phosphorescence (ORTP) with lifetimes the range of seconds. As one important three primary colors, blue ORTP an indispensable core component RTP regulation and application, however, large Stokes shift characteristics pose certain challenges ORTP. Here, new family phosphors are synthesized realized through crystal assembly water phase. Remarkably, compared to materials obtained phases, enabled long‐lived up 2.3 s quantum yield reached as high 29.27%. addition efficient green form, such dark possessed thermal stability flexible tunability. Moreover, superiority selected components demonstrated by comparing them polymer proposed show great potential programmable information encryption/anti‐counterfeiting.

Language: Английский

Citations

7
Room‐Temperature Near‐Infrared Phosphorescence from C64 Nanographene Tetraimide by π‐Stacking Complexation with Platinum Porphyrin DOI Creative Commons
M. A. Niyas, Swadhin Garain, Kazutaka Shoyama

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(33)

Published: May 7, 2024

Abstract Near‐Infrared (NIR) phosphorescence at room temperature is challenging to achieve for organic molecules due negligible spin–orbit coupling and a low energy gap leading fast non‐radiative transitions. Here, we show supramolecular host–guest strategy harvest the from low‐lying triplet state of C 64 nanographene tetraimide 1 . H NMR X‐ray analysis confirmed : 2 stoichiometric binding Pt(II) porphyrin on two π‐surfaces While free does not emission in NIR, complex solution shows NIR 77 K. Further, between 860–1100 nm, ( λ max =900 τ avg =142 μs) was observed solid‐state sample drop‐casted preformed solution. Theoretical calculations reveal non‐zero isoenergetic S T 3 π‐stacked [ ⋅ porphyrin] complex. External heavy‐atom‐induced along with rigidification protection oxygen promotes both intersystem crossing first excited singlet into manifold lowest

Language: Английский

Citations

6
The Role of Locally Excited State and Charge Transfer State in Organic Room Temperature Phosphorescence and Corresponding Applications DOI
Yao Zhao, Ya‐Wen Zhang, Jie Yang

et al.

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: unknown

Published: July 2, 2024

Abstract Donor–acceptor (D–A) structure with charge transfer (CT) effect is widely utilized in the construction of organic luminescent materials. The adjustment their CT and related property usually relies on changes molecular different D or A moieties, which will lead to some uncertainties structure‐property relationship. With aim explore clear inherent mechanism for D–A molecule effect, it ideal that regulation intramolecular one same can be realized. Accordingly, three type phosphorescence luminogens are designed synthesized. Once being doped into polymer matrixes, disparate effects room temperature (RTP) properties achieved a single molecule. Subsequent experiments confirm distributions molecules locally excited (LE) state mainly responsible distinct RTP behaviors, exhibiting well‐clarified relationship luminogens. Furthermore, transition from LE even realized through chemical reaction, leading activated practical applications.

Language: Английский

Citations

6