Stimuli-Responsive Biodegradable Cholesteric Films with Color-Tunable Circularly Polarized Ultralong Room-Temperature Phosphorescence

IF 17.3 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

ACS Nano Pub Date : 2026-10-06 Epub Date: 2026-09-21 DOI:10.1021/acsnano.6c11933

Jingxuan You, Wenhua Peng, Dong Xu, Zongliang Xie, Ching-Chiuan Yen, Jinming Zhang, Bin Liu

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引用次数: 0

Abstract

Circularly polarized luminescence (CPL) has been extensively explored in asymmetric catalysis, chiroptical sensing, and next-generation optoelectronics. Herein, we develop a cellulose-based cholesteric photonic platform incorporating chiral phosphors into hydroxypropyl cellulose (HPC) and cellulose nanocrystal (CNC) matrices, two cellulose-derived biopolymers capable of forming helicoidal liquid-crystalline phases. Through evaporation-induced self-assembly, R/S-phosphors are embedded within the HPC/CNC cholesteric matrices, suppressing non-radiative decay while promoting triplet stabilization and circular polarization amplification through host–guest interactions and cholesteric photonic modulation. Consequently, the CPRTP films exhibit exceptional |g_lum| values reaching 0.51 and ultralong phosphorescence lifetimes of up to 2.4 s, alongside irradiation-time-dependent and humidity-responsive behavior. These large-area, flexible, and biodegradable films enable multicolor chiral phosphorescent patterning and 3D printing, while their renewable/recyclable nature, high g_lum, and stimuli-responsiveness offer significant potential for information encryption, anti-counterfeiting, and environmental monitoring.

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具有颜色可调圆偏振超长室温磷光的刺激响应可生物降解胆甾膜

圆偏振发光（CPL）在不对称催化、热敏传感和下一代光电子学等领域得到了广泛的研究。在此，我们开发了一种基于纤维素的胆固醇酯光子平台，将手性荧光粉结合到羟丙基纤维素（HPC）和纤维素纳米晶体（CNC）基质中，这两种纤维素衍生的生物聚合物能够形成螺旋状液晶相。通过蒸发诱导的自组装，R/ s荧光粉被嵌入到HPC/CNC胆甾化基质中，抑制非辐射衰减，同时通过主客体相互作用和胆甾化光子调制促进三重态稳定和圆偏振放大。因此，CPRTP薄膜表现出特殊的|glum|值，达到0.51，超长磷光寿命高达2.4 s，同时具有辐照时间依赖性和湿度响应性。这些大面积、灵活、可生物降解的薄膜可以实现多色手性磷光图案和3D打印，同时它们的可再生/可回收性、高胶性和刺激响应性为信息加密、防伪和环境监测提供了巨大的潜力。

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来源期刊

ACS Nano 工程技术-材料科学：综合

CiteScore

26.00

自引率

4.10%

发文量

1627

审稿时长

1.7 months

期刊介绍： ACS Nano, published monthly, serves as an international forum for comprehensive articles on nanoscience and nanotechnology research at the intersections of chemistry, biology, materials science, physics, and engineering. The journal fosters communication among scientists in these communities, facilitating collaboration, new research opportunities, and advancements through discoveries. ACS Nano covers synthesis, assembly, characterization, theory, and simulation of nanostructures, nanobiotechnology, nanofabrication, methods and tools for nanoscience and nanotechnology, and self- and directed-assembly. Alongside original research articles, it offers thorough reviews, perspectives on cutting-edge research, and discussions envisioning the future of nanoscience and nanotechnology.