Photo-controlled fluorescent switches based on Si@ZnO quantum dots and diarylethenes for bioimaging and anti-counterfeiting

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2024-11-27 DOI:10.1016/j.jphotochem.2024.116179

Hengju Zhou , Xinhuan Ma , Jie Hu , Kefan Ning , Shiqiang Cui , Shouzhi Pu

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Abstract

The regulation of fluorescence emission of quantum dots by photochromic molecules has received considerable attention. However, the effects of the structure of photochromic compounds on their properties still need to be further investigated. Herein, two photo-controlled fluorescent switches were constructed with Si@ZnO quantum dots and two photochromic diarylethenes, respectively. In these two fluorescent switches, the diarylethenes could be transformed between open-ring state and closed-ring state upon irradiation with UV/vis lights, resulting in the fluorescence of the Si@ZnO switched between “ON” and “OFF”. The fluorescence modulation efficiencies of the two fluorescent switches were measured to be 91.5% and 88.7%, respectively. The effects of the structure of diarylethenes on the light response times, fluorescence lifetimes, and fatigue resistance were also studied. The mechanism of the fluorescent switching could be ascribed to the fluorescence resonance energy transfer (FRET) with Si@ZnO quantum dots as energy donors and diarylethenes in closed-ring state as energy acceptors. Furthermore, the prepared fluorescent switches were applied in bioimaging and anti-counterfeiting successfully.

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基于Si@ZnO量子点和二芳烯的光控荧光开关，用于生物成像和防伪

光致变色分子对量子点荧光发射的调控受到了广泛的关注。然而，光致变色化合物的结构对其性能的影响仍需进一步研究。其中，分别用Si@ZnO量子点和两个光致变色二芳烯构建了两个光控荧光开关。在这两个荧光开关中，二芳烯在紫外/可见光照射下可以在开环状态和闭环状态之间转换，导致Si@ZnO的荧光在“开”和“关”之间切换。两种荧光开关的荧光调制效率分别为91.5%和88.7%。研究了二亚乙烯的结构对光响应时间、荧光寿命和抗疲劳性能的影响。荧光开关的机制可以归结为荧光共振能量转移（FRET）， Si@ZnO量子点作为能量供体，二芳基乙烯作为能量受体的闭合环态。此外，所制备的荧光开关还成功地应用于生物成像和防伪领域。

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来源期刊

Journal of Photochemistry and Photobiology A-chemistry 化学-物理化学

CiteScore

7.90

自引率

7.00%

发文量

580

审稿时长

48 days

期刊介绍： JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds. All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor). The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.