Promoting the transfer of phosphorescence from the solid state to aqueous phase and establishing the universal real-time detection based on the smartphone imaging

磷光 水溶液 荧光 光化学 荧光粉 罗丹明B 材料科学 可见光谱 化学 光电子学 物理 光学 光催化 催化作用 有机化学
作者
Ying Zhu,Zhiying Feng,Zihao Yan,Xiaoming Yang
出处
期刊:Sensors and Actuators B-chemical [Elsevier BV]
卷期号:371: 132529-132529 被引量:24
标识
DOI:10.1016/j.snb.2022.132529
摘要

Currently, room-temperature phosphorescent (RTP) materials inspire the great interest owing to their tunable wavelengths, large stokes shift or potential values towards various applications. Howbeit, synthesizing RTP materials with the desirable property such as the long lifetime still encountered the intractable challenge due to the spin-forbidden nature of triplet exciton transitions. Here we initially achieved one kind of solid state phosphorescence by preparing the carbon dots (CDs) doped with nitrogen and phosphorus while diethanolamine and phosphoric acid served as the specific precursors. Significantly, the CDs were effectively protected away from the interference of water and oxygen in the surrounding environment through introducing tetraethyl orthosilicate, thus leading to the successful emergence of their phosphorescence in aqueous. This study not only provided a way of activating the phosphorescent emission from the solid state to aqueous phase, but also broadened the sensing avenues based on the aqueous phosphorescence. Since both their fluorescence and phosphorescence intensity of the CDs were regularly quenched based on the inner filter effect (IFE) by adding p-nitrophenol with various concentrations, we thereupon proposed a regular dual-channel strategy for detecting p-nitrophenol. More meaningfully, both the Hue and Brightness of their fluorescence and phosphorescence of CDs exhibited obvious distinctions, providing the possibility of establishing a dual-channel smartphone assaying strategy through directly photographing. Thus, we hereby raised a convenient intelligent detection of p-nitrophenol, and this brand-new way not only achieved the real-time detection of p-nitrophenol, but also showed the possibility of serving as a universal approach for detecting other targets on-site.
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