Photoswitchable WO₃₋ₓ QDs/Cu NCs Composite Films for Efficient UV Detection and Dual-Mode Anticounterfeiting

IF 3.5 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Dalton Transactions Pub Date : 2025-04-14 DOI:10.1039/d5dt00440c

Qingmiao Mu, Jia Li, Hongxi Gu, Lijun Ren, Juan Du, Hualei Cheng, Dengwei Hu

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引用次数: 0

Abstract

Photoswitchable fluorescent materials (PFMs) have attracted considerable attention due to the intrinsic advantages of non-contact operation, cleanliness, and non-invasiveness. Conventional PFMs always require complicated preparation processes with poor fluorescence switching properties, which are affected by the mechanisms of Föster resonance energy transfer (FRET) or photoinduced electron transfer (PET). The WO3-x QDs/Cu NCs composite films are prepared on different substrates by a solution casting method and displays outstanding fluorescence switching properties owing to the super photochromic performance of WO3-x QDs and aggregation-induced fluorescence of Cu NCs. The composite film exhibits reversible on/off switchable fluorescence under UV light irradiation and heat treatment based on the inner filter effect (IFE) mechanism. The composite film shows dynamic variations of the dual-mode signals, and the applications of UV sensing and anti-counterfeiting are analyzed. Sensitive dual-mode detection is realized in UV sensing, especially for UVB. The composite film has a dual-modal imaging capability with good reproducibility and high resolution for security information encryption and anti-counterfeiting. This work provides a novel strategy for fabricating advanced PFMs for multiple optical applications.

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用于高效紫外检测和双模防伪的可光开关WO₃￣ₓQDs/Cu NCs复合薄膜

光开关荧光材料（PFMs）由于其非接触操作、清洁和非侵入性等固有优点而受到广泛关注。传统的PFMs制备工艺复杂，荧光开关性能差，受Föster共振能量转移（FRET）或光致电子转移（PET）机制的影响。采用溶液浇铸法在不同衬底上制备了WO3-x量子点/Cu NCs复合薄膜，由于WO3-x量子点的超光致变色性能和Cu NCs的聚集诱导荧光，显示出优异的荧光开关性能。该复合薄膜在紫外光照射和热处理下表现出基于内滤效应（IFE）机制的可逆性开/关可切换荧光。研究了复合膜的双模信号的动态变化规律，并分析了复合膜在紫外传感和防伪方面的应用。在紫外传感中实现了灵敏的双模检测，特别是对UVB的检测。该复合薄膜具有双模成像能力，具有良好的再现性和高分辨率，可用于安全信息加密和防伪。这项工作为制造用于多种光学应用的先进pfm提供了一种新的策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Dalton Transactions 化学-无机化学与核化学

CiteScore

6.60

自引率

7.50%

发文量

1832

审稿时长

1.5 months

期刊介绍： Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.