Synthesis of Graphene Quantum Dots Decorated With Se, Eu and Ag As Photosensitizer and Study of Their Potential to Use in Photodynamic Therapy,Journal of Fluorescence

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Synthesis of Graphene Quantum Dots Decorated With Se, Eu and Ag As Photosensitizer and Study of Their Potential to Use in Photodynamic Therapy
Journal of Fluorescence ( IF 2.6 ) Pub Date : 2021-01-19 , DOI: 10.1007/s10895-020-02674-0
M Roeinfard ₁ , M Zahedifar _{1,

2} , M Darroudi _{3,

4} , A Khorsand Zak ₅ , E Sadeghi _{1,

2}

Affiliation

GQDs decorated with europium (Eu), silver (Ag) and selenium (Se) at molar ratios of 0.1%, 0.3% and 0.5% were produced for the first time at different temperatures of 180 °C, 200 °C and 220 °C. Surface passivation was carried out with polyethylene glycol (PEG) to increase the intensity of photoluminescence (PL) of the produced samples. The prepared quantum dots were characterized by X-Ray diffraction (XRD), Fourier transformed infrared spectroscopy (FTIR), transmission electron microscopy (TEM), PL and ultraviolet-visible spectroscopy. GQDs synthesized at 180 °C and decorated with Se (0.3%) had maximum PL intensity along with long lasted afterglow over 90 min compared with other samples. Excitation wavelength at 360 nm produced maximum emission at 600–900 nm and resulted in high singlet oxygen (¹O ₂) generation which makes it a good candidate for photodynamic therapy applications.

Graphical Abstract

中文翻译：

以硒、铕和银为光敏剂的石墨烯量子点的合成及其在光动力治疗中的应用潜力

在 180 °C、200 °C 和 220 °C 的不同温度下，首次制备了以摩尔比为 0.1%、0.3% 和 0.5% 的铕 (Eu)、银 (Ag) 和硒 (Se) 装饰的 GQD . 用聚乙二醇 (PEG) 进行表面钝化以增加所生产样品的光致发光 (PL) 强度。通过X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、透射电子显微镜（TEM）、PL和紫外-可见光谱对制备的量子点进行表征。与其他样品相比，在 180 °C 合成并用 Se (0.3%) 装饰的 GQD 具有最大的 PL 强度以及超过 90 分钟的持久余辉。360 nm 的激发波长在 600–900 nm 处产生最大发射，并导致高单线态氧（¹ O₂ ) 代，使其成为光动力疗法应用的良好候选者。

图形概要

更新日期：2021-01-19

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