Stimuli-fluorochromic smart organic materials

Chemical Society Reviews, Год журнала: 2024, Номер 53(3), С. 1090 - 1166

Опубликована: Янв. 1, 2024

This review highlights the developments in stimuli-fluorochromic π-conjugated solids beyond organometallic and organic light-responsive compounds, addressing design strategies, mechanisms, limitations, challenges, opportunities.

Язык: Английский

---

Fused‐Ring Pyrrole‐Based Near‐Infrared Emissive Organic RTP Material for Persistent Afterglow Bioimaging

Angewandte Chemie International Edition, Год журнала: 2023, Номер 63(5)

Опубликована: Дек. 12, 2023

Organic near-infrared room temperature phosphorescence (RTP) materials offer remarkable advantages in bioimaging due to their characteristic time scales and background noise elimination. However, developing RTP for deep tissue imaging still faces challenges since the small band gap may increase non-radiative decay, resulting weak emission short lifetime. In this study, fused-ring pyrrole-based structures were employed as guest molecules construction of long wavelength emissive materials. Compared decrease singlet energy level, triplet level showed a more effectively with conjugation substituent groups. Moreover, sufficient fused ring molecule suppresses decay excitons. Therefore, material (764 nm) was achieved penetration bioimaging. Tumor cell membrane is used coat nanoparticles (NPs) avoid decreasing performance compared traditional coating by amphiphilic surfactants. NPs tumor-targeting properties show favorable phosphorescent properties, superior stability, excellent biocompatibility. These are applied time-resolved luminescence eliminate interference penetration. This study provides practical solution prepare long-wavelength long-lifetime organic applications

Язык: Английский

---

A flexible ligand and halogen engineering enable one phosphor-based full-color persistent luminescence in hybrid perovskitoids

Chemical Science, Год журнала: 2024, Номер 15(10), С. 3625 - 3632

Опубликована: Янв. 1, 2024

Color-tunable room temperature phosphorescent (RTP) materials have raised wide interest due to their potential application in the fields of encryption and anti-counterfeiting. Herein, a series CdX

Язык: Английский

---

Stretchable phosphorescent polymers by multiphase engineering

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Май 15, 2024

Stretchable phosphorescence materials potentially enable applications in diverse advanced fields wearable electronics. However, achieving room-temperature simultaneously featuring long-lived emission and good stretchability is challenging because it hard to balance the rigidity flexibility same polymer. Here we present a multiphase engineering for obtaining stretchable phosphorescent by combining stiffness softness well-designed block copolymers. Due microphase separation, copolymers demonstrate an intrinsic of 712%, maintaining ultralong lifetime up 981.11 ms. This generally applicable series binary ternary initiator systems with color-tunable visible range. Moreover, these multi-level volumetric data encryption afterglow display. work provides fundamental understanding nanostructures material properties designing extends potential polymers.

Язык: Английский

---

Polymorphism‐Dependent Organic Room Temperature Phosphorescent Scintillation for X‐Ray Imaging

Advanced Materials, Год журнала: 2024, Номер 36(18)

Опубликована: Янв. 25, 2024

Abstract Organic phosphorescent scintillating materials have shown great potential for applications in radiography and radiation detection due to their efficient utilization of excitons. However, revealing the relationship between molecule stacking radioluminescence scintillators is still challenging. This study reports on two phenothiazine derivatives with polymorphism‐dependent phosphorescence radioluminescence. The experiments reveal that significantly affects non‐radiation decay triplet excitons scintillators, which further determines scintillation performance under X‐ray irradiation. These exhibit high radio stability a low limit 278 nGys −1 . Additionally, application these radiography, based excited properties, demonstrated. findings provide guideline obtaining high‐performance by shedding light effect crystal packing organic molecules.

Язык: Английский

---

Double-Model Decay Strategy Integrating Persistent Photogenic Radicaloids with Dynamic Circularly Polarized Doublet Radiance and Triplet Afterglow

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(11), С. 7668 - 7678

Опубликована: Март 7, 2024

Organic phosphors integrating circularly polarized persistent luminescence (CPPL) across the visible range are widespread for applications in optical information encryption, bioimaging, and 3D display, but pursuit of color-tunable CPPL single-component organics remains a formidable task. Herein, via situ photoimplanting radical ion pairing into axial chiral crystals, we present elucidate an unprecedented double-module decay strategy to achieve colorful through combination stable triplet emission from neutral diphosphine doublet radiance photogenic radicals exclusive crystalline framework. Owing photoactivation-dependent component inherent phosphorescence asymmetric environment, CPL vision can be regulated by altering photoactivation observation time window, allowing glow tuning blue orange delayed green emission. Mechanism studies clearly reveal that this electron migration environment hybrid n–π* π–π* instincts responsible afterglow at ambient conditions. Moreover, demonstrate displays encryption manipulation both excitation times.

Язык: Английский

---

Engineering Tunable Ratiometric Dual Emission in Single Emitter‐based Amorphous Systems

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(10)

Опубликована: Янв. 8, 2024

Molecular emitters with multi-emissive properties are in high demand numerous fields, while these basically depend on specific molecular conformation and packing. For amorphous systems, special arrangement is unnecessary, but it remains challenging to achieve such luminescent behaviors. Herein, we present a general strategy that takes advantage of rigidity S

Язык: Английский

---

Advances in organic room-temperature phosphorescence: Design strategies, photophysical mechanisms, and emerging applications

Materials Chemistry Frontiers, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Organic room-temperature phosphorescence can be facilitated according to rational design principles that promote intersystem crossing and decrease non-radiative decay in aggregated states, demonstrating versatile applications across multiple fields.

Язык: Английский

---

The Key Role of Molecular Packing in Luminescence Property: From Adjacent Molecules to Molecular Aggregates

Advanced Materials, Год журнала: 2023, Номер unknown

Опубликована: Сен. 22, 2023

Abstract The luminescence materials act as the key components in many functional devices, well detection and imaging systems, which can be permeated each aspect of modern life, attract more attention for creative technology applications. In addition to diverse properties organic luminogens, multiple molecular packing at aggregated states frequently offers new and/or exciting performance. However, there still lacks comprehensive analysis these materials, resulting an increased gap between design practical this review, from basic knowledge compounds single molecules, discernable property excimer, charge transfer (CT) complex or self‐assembly systems by adjacent finally opto‐electronic performance aggregates, relevant factors applications are discussed.

Язык: Английский

---

Naphthyl Substituted Impurities Induce Efficient Room Temperature Phosphorescence

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(50)

Опубликована: Окт. 31, 2023

Accidentally, it was found that triphenylamine (TPA) from commercial sources shows ultralong yellow-green room temperature phosphorescence (RTP) like carbazole, which however disappears for lab-synthesized TPA with high purity. Herein, we the first time identify impurity types cause RTP of TPA, are two N, N-diphenyl-naphthylamine isomers. Due to similar molecular polarity and very trace amount (≈0.8 ‰, molar ratio), these naphthyl substituted impurities can be easily overlooked. We further show even at an extremely low (1000000 : 1, mass ratio) impurities, emission is still generated, attributed triplet-to-triplet energy transfer mechanism. Notably, this doping strategy also applicable triphenylphosphine benzophenone host systems, strong activated by simply corresponding analogues into them. This work therefore provides a general efficient host/guest toward performance diverse organic materials.

Язык: Английский

---