Isomeric Engineering of Organic Luminophores for Multicolor Room Temperature Phosphorescence Including Red Afterglow

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

Published: June 8, 2024

Abstract Manipulating and optimizing the room temperature phosphorescence (RTP) behavior of organic luminophores is highly desirable for exploring their extensive potential applications. However, achieving tailored precise control over RTP emission colors remains a challenging task. Herein, three regioisomers, namely o ‐Br , m p ‐Br, are developed by directly bonding nitrogen atom commercial carbazole sulfur sulfonylbenzene group. This design not only features bromine substitution at different positions but also leads to formation N─S═O resonance linkages. With variation in position from ortho para color changes yellow red. Experimental investigations theoretical calculations demonstrate that this arises modulation contributions canonical forms N─S═O, which can be attributed regioisomerization atoms fine‐tuning intra‐ intermolecular interactions. Additionally, vitro cell imaging successfully realized employing red nanoparticles prepared luminophore. study reveals simple effective approach customizing through integration isomerization control.

Language: Английский

---

By employing racemization strategies to simultaneously enhance the quantum yield, lifetime, and water stability of room-temperature phosphorescent materials

Chemical Science, Journal Year: 2024, Volume and Issue: 15(21), P. 8052 - 8061

Published: Jan. 1, 2024

Room temperature phosphorescence (RTP) materials are increasingly recognized for their superior luminescent properties, which pivotal in applications such as anti-counterfeiting, information storage, and optoelectronics. Despite this, the sensitivity of most RTP systems to humidity presents a significant challenge achieving durable performance aqueous environments. This study proposes strategy enhance organic room-temperature through racemization. By incorporating external racemates various chiral phosphors-NDBD-Ph, NDBD-Ph-Ph, NDBD-CH3, NDBD-O-CH3-into polyacrylonitrile (PAN) matrix, we significantly properties (quantum yield, lifetime, afterglow-time) resultant films. enhancement can be attributed increased density racemic molecules matrix spin-orbit coupling (SOC), facilitating development long-lasting polymer system water. Notably, rac-NDBD-Ph@PAN film exhibits persistent bright turquoise afterglow, even after immersion water month. Furthermore, first time, achieved an enhanced green cyan response pH variations under both acidic alkaline conditions (pH = 2-12), with maximum emission intensity increasing up threefold. The remarkable stability, reversible characteristics, this offer promising potential dynamic encryption

Language: Английский

---

Modulating room-temperature phosphorescence of D-π-A luminogens via methyl substitution, positional isomerism, and host–guest doping

Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, Journal Year: 2025, Volume and Issue: 330, P. 125763 - 125763

Published: Jan. 19, 2025

Language: Английский

---

A novel montmorillonite-based room temperature phosphorescence material by host-guest system

Applied Clay Science, Journal Year: 2025, Volume and Issue: 271, P. 107799 - 107799

Published: April 2, 2025

Language: Английский

---

Harnessing Polymer Matrices for Tuning the Luminescence and Photochromism Properties of Organic Photoresponsive Materials

ACS Materials Letters, Journal Year: 2025, Volume and Issue: unknown, P. 1860 - 1868

Published: April 14, 2025

Language: Английский

---