Improving Pure Organic Room‐Temperature Phosphorescence by Substituent Effect of Thianthrene DOI Open Access

Zhe Feng,

Zhiqiang Yang,

Shuaiqiang Zhao

et al.

Chinese Journal of Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Comprehensive Summary To gain insights into the potential of thianthrene (TA), its substituent effects were systematically studied on room‐temperature phosphorescence (RTP) properties, including electron‐donating and electron‐withdrawing substituents at 1‐ 2‐positions TA, respectively. Both theoretical experimental investigations show that 2‐position greatly enhance RTP performance than 1‐position substituents, while situation is exactly opposite for substituents. Compared with substitution, induce higher radiation rate lower non‐radiation rate, in favor enhancement efficiency. Furthermore, introduction phenylene substitution suppresses non‐radiation, resulting simultaneously improved efficiency elongated lifetime. Finally, using these materials, dynamically reversible operations information (write‐read‐erase) are realized, as well encryption time‐dependent decryption demonstration. This work not only provides a better understanding structure–property relationship TA‐based but also suggests an intramolecular structural modification strategy to improve pure organic materials.

Language: Английский

Circularly Polarized Organic Ultralong Room‐Temperature Phosphorescence: Generation, Enhancement, and Application DOI Open Access

Jiao Liu,

Xinyu Zhou, Xianhui Tang

et al.

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

Published: Oct. 16, 2024

Abstract Circularly polarized luminescent (CPL) materials have garnered tremendous attention owing to their expanded optical properties beyond emission wavelength and intensity. Among these, the emerging circularly organic ultralong room‐temperature phosphorescence (CP‐OURTP) materialsdemonstrating elegant distinct features are of significant importance for extended lifetime, which represent a novel frontier in research with promising scientific technological applications across diverse fields. This review systematically outlines traditional strategies achieve CP‐OURTP including crystals, copolymerization, host–guest doping, combination copolymerization spinning twisting technology, supramolecular polymer assembly. Importantly, recent progress chiral soft materials, such as liquid crystals (LCs) involving lyotropic LCs (cellulose nanocrystals, CNCs) thermotropic (cholesteric LC elastomers), is showcased. Finally, practical summarized, concludes perspectives on current challenges future opportunities materials. aims inspire further innovations fabrication advanced enrich applications.

Language: Английский

Citations

8
Circularly Polarized Room-Temperature Phosphorescence from Marine Polysaccharide-Based Helical Assemblies DOI
Mingjie Wang, Zhaocun Shen, Fang Zhang

et al.

ACS Materials Letters, Journal Year: 2025, Volume and Issue: unknown, P. 1171 - 1178

Published: Feb. 24, 2025

Language: Английский

Citations

0
Dual-Ring-Locking Strategy Enables Persistent Blue Room Temperature Phosphorescence in Benzo[b]phospholiums DOI
Bo Yang,

Suqiong Yan,

Shirong Ban

et al.

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 18, 2025

Commercial phosphines and phosphoniums were commonly reported to have unstable triplet dissipation because of the flexible C-P pyramidal geometry, resulting in extremely weak or no phosphorescence. To boost populations stability by restricting molecular motion rebuilding electronic structures, we that dual-ring-locking strategy could enable elevated intersystem crossing (ISC) radiation for rigid benzo[b]phospholium configuration, exhibiting intense persistent room temperature phosphorescence (RTP) poly(vinyl alcohol) (PVA). Among them, dual-ring-locked [P1]+[Cl]- showed near-ultraviolet fluorescence maximized at 400 nm dichloromethane blue RTP emission 453 (Φphos ≈ 12.4%, τphos > 1200 ms) PVA matrix. In contrast, [P2]+[Cl]- possessed a single ring-locked nucleus had red-shifted < 1.8%, = 74.2 ms). Time-dependent density functional theory (TD-DFT) disclosed improved spin-flipping benefited from integrated π-π*/n-π* transition, rational split energy, excited states. The impressive OU-RTP duration function as an afterglow pattern optical encryption emitting layer light-emitting diode (LED) applications.

Language: Английский

Citations

0
Enhanced Photoactivated Circularly Polarized Afterglow with High Dissymmetry Factor and Tunable Emission DOI Open Access
Yuxia Zhang, Yu-Chang Wang,

Junjie Wu

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

Abstract Photoactivated circularly polarized afterglow (CPA) exhibits broad application prospects in various optoelectronic areas due to its multidimensional emission characteristics, including wavelengths, lifetimes, and chirality. Achieving photoactivated CPA with extremely high dissymmetry factor ( g lum ) values is highly desired but considerably challenging. This work reports a bilayer assembly (R/S‐CLC‐TPB) integrating TPB@PMMA thin film the selective reflection of cholesteric liquid crystals. Initially, R/S‐CLC‐TPB no emission, while following 1 min UV irradiation, it achieves an noticeable long lifetime 125 ms value up 1.6. enhancement can be attributed oxygen consumption properties under subsequently minimizing loss triplet exciton. Furthermore, by employing triplet‐singlet Förster resonance energy transfer (TS‐FRET) strategy from organic persistent room‐temperature phosphorescence donor fluorescent dye acceptor, color successfully modulated green orange. Ultimately, these materials demonstrate promising capabilities for advanced multi‐level information encryption utilizing their tunable color, create multiple layers that selectively accessed decoded based on photoactivation chiroptical properties.

Language: Английский

Citations

0
Multi‐Stimuli‐Responsive Circularly Polarized Luminescence with Handedness Inversion and Near‐Infrared Phosphorescence in Chiral Metal‐Organic Framework Platform for White Light Emission and Information Encryption DOI Creative Commons
Kun Zhang, Dan Ni, Ruoyu Zhang

et al.

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

Published: March 17, 2025

Abstract Preparing multi‐color and multi‐stimuli‐responsive circularly polarized luminescence (CPL) materials understanding the evolution of chirality through visualized mode is still a challenge. Here, an encapsulation engineering approach chiral metal‐organic frameworks (MOFs) proposed to confine guest emitters realize CPL. Based on triplet‐triplet energy transfer (TTET), white CPL near‐infrared room temperature phosphorescence (NIR‐CPRTP) can be obtained by introducing pyrene derivatives. With introduction containing vinylpyrene group, light‐ thermal‐responsive with signal inversion realized reversible [2+2] cycloaddition reaction between ligand triggered visible light/ultraviolet light or heating. Furthermore, excitation‐dependent successfully achieved incorporation excited state intramolecular proton (ESIPT) molecules into nanopores. Importantly, magnification greatly enhanced spatial confinement, accurate host‐guest single crystal structures FLT@DCF‐12 FLT@LCF‐12 provide understand mechanism transfer, amplification responsiveness. White LED multiple information display encryption are further demonstrated. This breakthrough provides new perspective guest‐encapsulated MOFs contributes construction stimuli‐responsive CPL‐active materials.

Language: Английский

Citations

0
Improving Pure Organic Room‐Temperature Phosphorescence by Substituent Effect of Thianthrene DOI Open Access

Zhe Feng,

Zhiqiang Yang,

Shuaiqiang Zhao

et al.

Chinese Journal of Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Comprehensive Summary To gain insights into the potential of thianthrene (TA), its substituent effects were systematically studied on room‐temperature phosphorescence (RTP) properties, including electron‐donating and electron‐withdrawing substituents at 1‐ 2‐positions TA, respectively. Both theoretical experimental investigations show that 2‐position greatly enhance RTP performance than 1‐position substituents, while situation is exactly opposite for substituents. Compared with substitution, induce higher radiation rate lower non‐radiation rate, in favor enhancement efficiency. Furthermore, introduction phenylene substitution suppresses non‐radiation, resulting simultaneously improved efficiency elongated lifetime. Finally, using these materials, dynamically reversible operations information (write‐read‐erase) are realized, as well encryption time‐dependent decryption demonstration. This work not only provides a better understanding structure–property relationship TA‐based but also suggests an intramolecular structural modification strategy to improve pure organic materials.

Language: Английский

Citations

0