Intense Left‐handed Circularly Polarized Luminescence in Chiral Nematic Hydroxypropyl Cellulose Composite Films

Abstract

Integrating optically active components into chiral photonic cellulose to fabricate circularly polarized luminescent materials has transformative potential in disease detection, asymmetric reactions, and anti‐counterfeiting techniques. However, the lack of cellulose‐based left‐handed circularly polarized light (L‐CPL) emissions hampers the progress of these chiral functionalizations. Here, we propose an unprecedented strategy: incorporating a chiral nematic organization of hydroxypropyl cellulose with robust aggregation‐induced emission luminogens to generate intense L‐CPL emission. By utilizing N, N‐dimethylformamide as a good solvent for fluorescent components and cellulose matrices, we produce a right‐handed chiral nematic structure film with a uniform appearance in reflective and fluorescent states. Remarkably, this system integrates a high asymmetric factor (0.51) and an impressive emission quantum yield (55.8%) into one fascinating composite. More meaningfully, this approach is versatile, allowing for the incorporation of luminogen derivatives emitting multi‐colored L‐CPL. These chiral fluorescent films possess exceptional mechanical flexibility (toughness up to 0.9 MJ∙m−3) and structural stability even under harsh environmental exposures, making them promising for the fabrication of various products. Additionally, these films can be cast on the fabrics to reveal multi‐level and durable anti‐counterfeiting capabilities or used as a chiral light source to induce enantioselective photopolymerization, thereby offering significant potential for diverse practical applications.This article is protected by copyright. All rights reserved

Enhancing Aging Resistance of Transparent Paper: Structural Modification of Wood Fibers via Carboxymethylation

“…6−11 It is promoting the development of flexible, high-performance, and degradable electronic devices. 5,12,13 Papermaking has become the favored method for the fabrication of transparent cellulose paper, known for its efficiency and large-scale production compatibility. Based on the different treatments of fiber raw materials, the papermaking method can be further classified into direct mechanical treatment, chemical modification approaches, etc.…”

“…Highly transparent cellulose paper is increasingly recognized for its potential in electronic devices, serving as a substrate or functional layer due to its outstanding optical properties, flexibility, renewability, and biodegradability. − For instance, it can act as a light management layer in solar cells to improve photoelectric conversion efficiency and is also utilized in light-emitting diode (LED) light management to enhance light scattering. − It is promoting the development of flexible, high-performance, and degradable electronic devices. ,, …”