White light-excited organic room-temperature phosphorescence for improved in vivo bioimaging

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: April 28, 2025

Language: Английский

---

Ion-Radical Mediated Multi-Color Ultra-Long Afterglow Materials

Published: April 30, 2024

Pure organic persistent room temperature phosphorescence (RTP) has shown great potential in numerous applications, ranging from information encryption and display technologies to bio-applications beyond. In this work, a suite of multi-color long-lived RTP materials featuring distinct afterglow emissions was constructed using an ion-radical mediated approach. b[c]p/MeBPO emitted vivid yellow centered at 560 nm with impressively long lifetime 860.01 ms. While compound b[a]a exhibited near-infrared (NIR) (τ = 215.96 ms) after doping into the matrix. The transient absorption spectroscopy investigations disclosed that observed phenomenon fundamentally tied generation radical ions rather than exciplex. These resulted reduction quenching process triplet excited state BPO by ground agent. A novel evaluation methodology devised, rooted Marcus theory, gauge specific dopant-matrix combination towards generating pronounced afterglow. According framework, enhancement is directly proportional decrease activation energy (ΔG≠) associated electron transfer reaction occurring between dopant Notably, when ΔG≠ surpasses 30 kcal/mol, no observable occurs, as higher values significantly impede two components. Furthermore, system exhibits exceptional sensitivity, low 0.02‰ molar ratio host material. This remarkable dependence intensity on concentration renders bi-component highly promising for applications requiring ultra-high sensitivity broad-spectrum detection capabilities.

Language: Английский

---

Regulating room temperature phosphorescence of carbazole quaternization pyridine in polymer through Hofmeister effect

Aggregate, Journal Year: 2024, Volume and Issue: unknown

Published: June 17, 2024

Abstract Hofmeister effect is a famous physical chemistry phenomenon that was reported hundred years ago, which firstly refers to the action of certain salts decrease solubility proteins while others increase. The on luminescent properties cationic organic fluorophore still obscure, especially for their room temperature phosphorescence (RTP). Herein, hydrophilic groups (quaternization pyridine) were introduced into carbazole molecules obtain series derivatives (named CZ‐Py + ) with different counter anions in series. These displayed tunable fluorescent color from cyan yellow solid state following sequence and anti‐Hofmeister behavior an aqueous solution. Moreover, RTP material emission lifetime achieved by doping anion polymethyl methacrylate polyvinyl alcohol, good performance time getting information encryption anti‐counterfeiting.

Language: Английский

---

Enhanced Photoactivated Circularly Polarized Afterglow with High Dissymmetry Factor and Tunable Emission

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

---

Organic-phosphate hybrids with colorful persistent luminescence

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161969 - 161969

Published: March 1, 2025

Language: Английский

---