Role of alkan-1-ol solvents in the synthesis of yellow luminescent carbon quantum dots (CQDs): van der Waals force-caused aggregation and agglomeration

Hagiwara Kenta; Uchida Hiroshi; Suzuki Yumiko; Hayashita Takashi; Torigoe Kanjiro; Kida Tetsuya; Horikoshi Satoshi

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Role of alkan-1-ol solvents in the synthesis of yellow luminescent carbon quantum dots (CQDs): van der Waals force-caused aggregation and agglomeration

机译：链烷-1- ol溶剂在黄色发光碳量子点合成中的作用（CQDS）：范德瓦尔斯力引起的聚集和聚集

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Carbon quantum dots (CQDs; luminescent carbon nanoparticles, size < 10 nm) have attracted much attention with respect to their eco-friendliness and multi-functionality. The solvent-dependent photoluminescence of CQDs has been well investigated to optimize the synthesis process and homogeneous dispersion. Although some alkan-1-ol solvents, such as ethanol, have been well utilized empirically as good solvents when synthesizing highly photoluminescent CQDs, the role of alkan-1-ol solvents, particularly long-chain alkan-1-ols (e.g., 1-nonanol, 1-decanol), has not yet been clarified. Herein, we demonstrate a method for the synthesis of strongly yellow emitting CQDs using solvothermal treatment and elucidate the role of alkan-1-ol solvents in the photoluminescence of CQDs. These CQDs have been characterized using theoretical calculations, ex situ morphological observations using transmission electron microscopy (TEM) and dynamic light scattering (DLS), and 500 MHz H-1 nuclear magnetic resonance (NMR) and C-13 NMR spectroscopy. A comparative study of alkan-1-ol solvents suggests a mechanism for the agglomeration and aggregation of carbon precursors, intermediates, and CQDs, which is expected to lead to further synthesis studies on highly luminescent CQDs.

机译：碳量子点（CQDS;发光碳纳米粒子，尺寸<10nm）引起了与其生态友好性和多功能的关注。已经很好地研究了CQD的溶剂依赖性光致发光以优化合成过程和均匀分散体。虽然在合成高度光致发光CQDS时，在合成高光致发光的CQDS时，已经很好地利用了一些如乙醇，如乙醇，但是在高度光致发光的CQDS的作用，尤其是长链ALKAN-1- OLS（例如，1 - Nonanol，1-癸醇）尚未澄清。在此，我们证明了一种使用溶剂处理合成强黄发射CQDS的方法，并阐明了AlKan-1-Ol溶剂在CQD的光致发光中的作用。这些CQDS的特征在于使用理论计算，使用透射电子显微镜（TEM）和动态光散射（DLS）和500MHz H-1核磁共振（NMR）和C-13 NMR光谱学的原位形态学观察。的烷-1-醇溶剂的比较研究提出了的碳前体，中间体和CQDs的附聚和聚集，从而有望导致对高度发光CQDs进一步合成研究的机构。

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《RSC Advances》 |2020年第24期|共7页
作者
Hagiwara Kenta; Uchida Hiroshi; Suzuki Yumiko; Hayashita Takashi; Torigoe Kanjiro; Kida Tetsuya; Horikoshi Satoshi;
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作者单位

Sophia Univ Fac Sci &

Technol Dept Mat &

Life Sci Chiyoda Ku 7-1 Kioicho Tokyo 1028554 Japan;

Sophia Univ Fac Sci &

Technol Dept Mat &

Life Sci Chiyoda Ku 7-1 Kioicho Tokyo 1028554 Japan;

Sophia Univ Fac Sci &

Technol Dept Mat &

Life Sci Chiyoda Ku 7-1 Kioicho Tokyo 1028554 Japan;

Sophia Univ Fac Sci &

Technol Dept Mat &

Life Sci Chiyoda Ku 7-1 Kioicho Tokyo 1028554 Japan;

Tokyo Univ Sci Fac Sci &

Technol Dept Pure &

Appl Chem 2641 Yamazaki Noda Chiba 2788510 Japan;

Kumamoto Univ Fac Adv Sci &

Technol Div Mat Sci Kumamoto 8608555 Japan;

Sophia Univ Fac Sci &

Technol Dept Mat &

Life Sci Chiyoda Ku 7-1 Kioicho Tokyo 1028554 Japan;

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1. Role of alkan-1-ol solvents in the synthesis of yellow luminescent carbon quantum dots (CQDs): van der Waals force-caused aggregation and agglomeration [J] . Hagiwara Kenta, Uchida Hiroshi, Suzuki Yumiko, RSC Advances . 2020,第24期

机译：链烷-1- ol溶剂在黄色发光碳量子点合成中的作用（CQDS）：范德瓦尔斯力引起的聚集和聚集
2. Low-Temperature Hydrothermal Synthesis of Green Luminescent Carbon Quantum Dots (CQD), and Optical Properties of Blends of the CQD with Poly(3-hexylthiophene) [J] . Feng Xiaoting, Zhao Yongqiang, Yan Lingpeng, Journal of Electronic Materials . 2015,第10期

机译：绿色发光碳量子点（CQD）的低温水热合成以及CQD与聚（3-己基噻吩）混合物的光学性质
3. Van der Waals' Condensation of ZnSe on Layered GaSe van der Waals' Surfaces: A New Route to Self-Organized Well-Defined Quantum Dot Structures [J] . Elmar Wisotzki, Aandreas Klein, Wolfram Jaegermann Advanced Materials . 2005,第9期

机译：范德华斯在层状GaSe范德华斯表面上的ZnSe缩合：自组织良好定义的量子点结构的新途径
4. Advances on synthesis of highly luminescent carbon quantum dots by citric acid carbonization [C] . M. A. Perez-Guzman, R Ortega-Amaya, M Ortega Lopez International Conference on Electrical Engineering, Computing Science and Automatic Control . 2017

机译：柠檬酸碳化合成高发光碳量子点的研究进展
5. Parallel computations in quantum Monte Carlo simulation of thevan der Waals cluster vibrational eigenstates. [D] . Li, Haisen. 2004

机译：范德华簇的振动本征态的量子蒙特卡洛模拟中的并行计算。
6. Facile Synthesis of Surface-Modified Carbon Quantum Dots (CQDs) for Biosensing and Bioimaging [O] . Łukasz Janus, Julia Radwan-Pragłowska, Marek Piątkowski, 2020

机译：用于生物传感和生物分析的表面改性碳量子点（CQDS）的容易合成
7. Role of alkan-1-ol solvents in the synthesis of yellow luminescent carbon quantum dots (CQDs): van der Waals force-caused aggregation and agglomeration [O] . Kenta Hagiwara, Hiroshi Uchida, Yumiko Suzuki, 2020

机译：链烷-1- ol溶剂在黄色发光碳量子点合成中的作用（CQDS）：范德瓦尔斯力引起的聚集和聚集
8. Van Der Waals Modes of Solute/Solvent Clusters: Benzene-Methane, -Deuteromethane, and -Carbon Tetrafluoride. [R] . Menapace, J. A., Bernstein, E. R. 1987

机译：范德瓦尔斯溶质/溶剂团簇的模式：苯 - 甲烷， - 十氟甲烷和 - 四氟化碳。

Role of alkan-1-ol solvents in the synthesis of yellow luminescent carbon quantum dots (CQDs): van der Waals force-caused aggregation and agglomeration

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