水环境中的全色长寿命室温磷光,Small

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水环境中的全色长寿命室温磷光
Small ( IF 13.0 ) Pub Date : 2022-04-04 , DOI: 10.1002/smll.202201223
Yan Zheng ₁ , Qian Zhou ₁ , Yan Yang ₁ , Xiaohong Chen ₁ , Chang Wang ₁ , Xian Zheng ₁ , Liang Gao ₁ , Chaolong Yang _{1,

2}

Affiliation

长寿命室温磷光（RTP）材料由于其独特的长寿命发光和无背景自发荧光的特性，被广泛应用于生物和化学传感领域。然而，在水溶液中实现全彩 RTP 仍然是一个巨大的挑战。本文通过构建刚性氢键网络，报道了一种在水环境中实现碳点 (CDs) 基复合材料的高稳定性和全色 RTP 的可行策略。得到的m,p-CDs@CA复合材料呈现深蓝色RTP，磷光量子产率为23.2%，寿命为1.74 s，余辉可持续12 s以上。更重要的是，m,p-CDs@CA 复合材料因其优异的稳定性、分散性、和长寿命的 RTP 属性。m,p-CDs@CA 悬浮液还显示出出色的灵敏度，检测限低至 5.61 和 550 nm分别用于生物标志物 5-羟基吲哚-3-乙酸 (HIAA) 和血清素 (5-羟色胺, HT)。同时，即使在血浆和尿液中存在其他竞争物种的情况下，传感性能也表现出优异的选择性。基于m,p-CDs@CA悬浮液的长寿命磷光探针具有优异的选择性，可作为类癌鉴定的有效生物标志物，在临床分析中具有潜在应用价值。

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Full-Color Long-Lived Room Temperature Phosphorescence in Aqueous Environment

Long-lived room temperature phosphorescence (RTP) materials are widely utilized in the field of biological and chemical sensing, due to their unique characteristics of long-lived luminescence and no background autofluorescence. However, the realization of full-color RTP in aqueous solution still remains a great challenge. Herein, a feasible strategy for achieving high stability and full-color RTP of carbon dots (CDs)-based composite materials in aqueous environment is reported by constructing a rigid hydrogen bonds’ network. The obtained m,p-CDs@CA composite materials exhibit deep-blue RTP with phosphorescence quantum yield of 23.2% and lifetime of 1.74 s, and the afterglow can last for over 12 s. More importantly, the m,p-CDs@CA composite materials are desirable in the detection of biomarkers, because of excellent stability, dispersion, and long-lived RTP properties. The m,p-CDs@CA suspension also displays excellent sensitivity, and a limitation of detection as low as 5.61 and 550 nm for biomarkers 5-hydroxyindole-3-acetic acid (HIAA) and serotonin (5-hydroxytryptamine, HT), respectively. Meanwhile, the sensing performance exhibits excellent selectivity even in the presence of other competitive species in blood plasma and urine. With superior selectivity, the long-lived phosphorescence probe based on m,p-CDs@CA suspension can be as an effective biomarker for carcinoid identification, which has potential application in clinical analysis.

更新日期：2022-04-04

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