Pressure-triggered aggregation-induced emission enhancement in red emissive amorphous carbon dots
Pressure-triggered aggregation-induced emission enhancement in red emissive amorphous carbon dots
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红色发射非晶碳点中压力触发聚集诱导的发射增强
DOI：
10.1039/c9nh00287a
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发表时间：
2019-09-01
影响因子：
9.7
通讯作者：
Lu, Siyu
中科院分区：
文献类型：
--
作者：
Wang, Qi;Zhang, Shijie;Lu, Siyu
碳点因其独特的化学结构、优异的光电性能和方便的合成而受到广泛关注。然而，合成具有稳定的红光波长的碳点仍然是一个挑战。本文以1，3，5-苯三硫酚为原料，采用乙醇溶剂热法制备了具有红光发射的碳点。随着R-Cd浓度的增加，R-Cd的荧光发射红移到近红外区域。重要的是，由于压力触发的聚集诱导发射，合成的R-CDs在外部压力下提供了荧光增强。降压过程的荧光测量表明，R-Cd还具有可逆压致变色发光(1 atm-1.2 Gpa)。R-CD具有显著的光学性能和良好的生物相容性，我们将其用于透明荧光薄膜、发光二极管(LED)和细胞成像。R-Cd具有优异的光学性质，在生物医学和发光材料方面具有广阔的应用前景。
Carbon dots have received extensive attention due to their unique chemical structure, excellent optoelectronic properties and convenient synthesis. However, the synthesis of carbon dots with stable red wavelength luminescence remains a challenge. Here, we used the ethanol solvothermal method with 1,3,5-benzenetrithiol as the raw material to prepare carbon dots with red emission (R-CDs). When the concentration of R-CDs increased, the fluorescence emission of the R-CDs red-shifted to the near infrared region. Importantly, the as-synthesized R-CDs offer fluorescence enhancement under external pressure due to pressure-triggered aggregation-induced emission. Fluorescence measurements of the depressurization process show that the R-CDs also have a reversible piezochromic luminescence (1 atm-1.2 GPa). The R-CDs have notable optical properties and great biocompatibility, and we used them for a transparent fluorescent thin film, light emitting diode (LED) and cell imaging. The excellent optical properties of R-CDs indicate their broad potential applicability in biomedical and luminescent materials.