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Conjugate Area-Controlled Synthesis of Multiple-Color Carbon Dots and Application in Sensors and Optoelectronic Devices
Sensors and Actuators B: Chemical ( IF 8.4 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.snb.2020.129263
Fanyong Yan , Hao Zhang , Nanhai Yu , Zhonghui Sun , Liang Chen

During the heretofore several years, Carbon dots (CDs) have achieved the widely used in fluorescence sensing, optoelectronics and bio imaging owing to their distinctive photoluminescence attribute. Here, CDs with bule to red emission were prepared by solvent heat treatment of phenol-derived with regulation the reaction time in the synthetic system, and their fluorescence spectra ranged from 450 ∼ 650 nm. Characterization through variety of methods and density functional theory calculations clearly demonstrates that the achieve stable long-wavelength emission caused in solvent is mainly due to the increase in conjugate area and oxygen elements of CDs. Importantly, conjugate area and oxidation degree can affect the level of HOMO-LUMO, further changing the band gap leading to fluorescent red-shift. Because of their excellent photoluminescent properties, we examined the performance in detection of non-metal ions by green and yellow-color CDs. The results show that they have high accuracy and rapid reaction to ClO- within the scope of 0 ∼ 50 μM and 4 ∼ 44 μM, with response limits are 31.1 nM and 56.5 nM, respectively. Moreover, we also prepared CDs/PMMA films and CDs/epoxy resin films with highly transparent and stability. Subsequently, the white-light emission diodes (0.32, 0.31; ClE coordinate) was obtained through mixing CDs in a certain proportion. This study provides a novel platform for fluorescence sensing of multi-color emission CDs, and provides strong potential for new optoelectronic equipment.



中文翻译:

共轭区域控制的多色碳点的合成及其在传感器和光电器件中的应用

在过去的几年中,碳点(CD)由于具有独特的光致发光特性,已经在荧光传感,光电和生物成像中得到了广泛的应用。在此,通过调节合成系统中的反应时间,通过对苯酚衍生的溶剂进行热处理,制备出具有蓝绿色至红色发光的CD,其荧光光谱范围为450〜650 nm。通过各种方法和密度泛函理论计算的表征清楚地表明,在溶剂中实现稳定的长波发射主要是由于CD的共轭面积和氧元素的增加。重要的是,共轭面积和氧化度会影响HOMO-LUMO的水平,进一步改变带隙,导致荧光红移。由于它们具有出色的光致发光特性,我们研究了绿色和黄色CD在检测非金属离子方面的性能。结果表明,它们在0〜50μM和4〜44μM范围内具有较高的准确度和对ClO-的快速反应,响应极限分别为31.1 nM和56.5 nM。此外,我们还制备了具有高度透明性和稳定性的CD / PMMA膜和CD /环氧树脂膜。随后,通过以一定比例混合CD获得白光发射二极管(0.32,0.31; ClE坐标)。这项研究为多色发射CD的荧光感测提供了一个新颖的平台,并为新型光电设备提供了强大的潜力。结果表明,它们在0〜50μM和4〜44μM范围内具有较高的准确度和对ClO-的快速反应,响应极限分别为31.1 nM和56.5 nM。此外,我们还制备了具有高度透明性和稳定性的CD / PMMA膜和CD /环氧树脂膜。随后,通过以一定比例混合CD获得白光发射二极管(0.32,0.31; ClE坐标)。这项研究为多色发射CD的荧光感测提供了一个新颖的平台,并为新型光电设备提供了强大的潜力。结果表明,它们在0〜50μM和4〜44μM范围内具有较高的准确度和对ClO-的快速反应,响应极限分别为31.1 nM和56.5 nM。此外,我们还制备了具有高度透明性和稳定性的CD / PMMA膜和CD /环氧树脂膜。随后,通过以一定比例混合CD获得白光发射二极管(0.32,0.31; ClE坐标)。这项研究为多色发射CD的荧光感测提供了一个新颖的平台,并为新型光电设备提供了强大的潜力。0.31;通过按一定比例混合CD获得ClE坐标)。这项研究为多色发射CD的荧光传感提供了一个新颖的平台,并为新型光电设备提供了强大的潜力。0.31;通过按一定比例混合CD获得ClE坐标)。这项研究为多色发射CD的荧光感测提供了一个新颖的平台,并为新型光电设备提供了强大的潜力。

更新日期:2020-12-01
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