Chemical Engineering Journal, Год журнала: 2024, Номер 495, С. 153406 - 153406
Опубликована: Июнь 22, 2024
Язык: Английский
Coordination Chemistry Reviews, Год журнала: 2024, Номер 516, С. 215987 - 215987
Опубликована: Май 31, 2024
Язык: Английский
Процитировано
25
Advanced Science, Год журнала: 2024, Номер 11(28)
Опубликована: Май 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.
Язык: Английский
Процитировано
16
Advanced Functional Materials, Год журнала: 2024, Номер 34(27)
Опубликована: Фев. 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.
Язык: Английский
Процитировано
12
Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(38)
Опубликована: Июль 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.
Язык: Английский
Процитировано
8
Carbon, Год журнала: 2025, Номер unknown, С. 120122 - 120122
Опубликована: Фев. 1, 2025
Язык: Английский
Процитировано
1
Advanced Functional Materials, Год журнала: 2024, Номер 34(46)
Опубликована: Июль 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.
Язык: Английский
Процитировано
7
Coordination Chemistry Reviews, Год журнала: 2024, Номер 518, С. 216066 - 216066
Опубликована: Июль 15, 2024
Язык: Английский
Процитировано
7
Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(33)
Опубликована: Май 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
Язык: Английский
Процитировано
6
Advanced Optical Materials, Год журнала: 2024, Номер unknown
Опубликована: Июль 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.
Язык: Английский
Процитировано
6
ACS Applied Optical Materials, Год журнала: 2024, Номер 2(12), С. 2476 - 2500
Опубликована: Апрель 19, 2024
Triplet excited states in organic semiconductors are usually optically dark and long-lived as they have a spin-forbidden transition to the singlet ground state therefore hinder processes light-harvesting applications. Also, triplets often cause damage system can sensitize formation of reactive oxygen. Despite these unfavorable characteristics, there exist mechanisms through which we utilize triplet states, that constitutes scope this review. Commencing with an introductory short exploration problem, proceed elucidate principal underpinning utilization materials: 1. Phosphorescence (PH), 2. Thermally Activated Delayed Fluorescence (TADF), 3. Triplet-Triplet Annihilation (TTA). In each section unveil their working principles, highlight vast range applications, discuss limitations perspectives. We dedicate special attention use light-emitting diodes (OLEDs), given OLEDs represent most thriving commercial application semiconductors. This review aims provide readers insights opportunities engage contribute study photophysical properties device physics semiconductors, especially regarding harnessing potential states.
Язык: Английский
Процитировано
5