SIOC English
化学学报
高级检索

化学学报 >

2021 , Vol. 79 >Issue 10: 1281 - 1285

DOI: https://doi.org/10.6023/A21070333

研究论文

Ag2S基近红外II区荧光量子点的水相合成优化探究

  • 余梦 ,
  • 张子俊 ,
  • 朱国委 ,
  • 谷振华 ,
  • 段玉霖 ,
  • 余良翀 ,
  • 高冠斌 ,
  • 孙涛垒
展开
  • a 武汉理工大学 材料复合新技术国家重点实验室 武汉 430070
    b 武汉理工大学 化学化工与生命科学学院 武汉 430070
† 共同第一作者
* E-mail: (高冠斌);
(孙涛垒)

收稿日期: 2021-07-16

  网络出版日期: 2021-08-13

基金资助

国家自然科学基金(21975191); 国家自然科学基金(21805218); 国家自然科学基金(51873168); 国家级大学生创新创业训练计划(202110497008)

收起

Synthesis of Ag2S Based Quantum Dots with Near-infrared-II Fluorescence Emission in Water

  • Meng Yu ,
  • Zijun Zhang ,
  • Guowei Zhu ,
  • Zhenhua Gu ,
  • Yulin Duan ,
  • Liangchong Yu ,
  • Guanbin Gao ,
  • Taolei Sun
Expand
  • a State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070
    b School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070
† These authors contributed equally to this work

Received date: 2021-07-16

  Online published: 2021-08-13

Supported by

National Natural Science Foundation of China(21975191); National Natural Science Foundation of China(21805218); National Natural Science Foundation of China(51873168); National innovation and Entrepreneurship Training Program for College Students(202110497008)

Fold

摘要

具有近红外II区荧光的Ag2S量子点(QDs)因具有带隙窄、Stokes位移大及光稳定性好等优点而在生物成像领域具有广阔应用前景. 然而, 传统有机相合成的Ag2S量子点水溶性与生物相容性较差, 而水相合成Ag2S量子点的荧光又很难到近红外II区, 这严重制约了Ag2S量子点的生物医学应用推广. 因此, 优化探究具有近红外II区荧光发射的Ag2S基量子点的水相合成方法具有重要意义. 采用核掺杂ZnS、表面阳离子(Zn2+)改性以及调控表面配体制备出一系列Ag2S基量子点, 发现核掺杂和表面阳离子改性均使Ag2S基量子点的荧光呈现剂量依赖性蓝移; 而将表面配体由树枝状短链(Captopril)更换为长直链(11-巯基十一烷酸, MUA)时, Ag2S基量子点的发射峰红移至1105 nm(近红外II区)且半峰宽更窄. 本研究发现, 相比核掺杂和表面阳离子改性, 优化表面配体更容易在水相中制备出具有近红外II区荧光的Ag2S基量子点. 本工作为近红外荧光量子点的水相合成及优化提供了基础研究数据.

关键词： 近红外II区荧光; Ag2S基量子点; 水相合成; 核掺杂; 表面阳离子改性; 优化表面配体

本文引用格式

余梦 , 张子俊 , 朱国委 , 谷振华 , 段玉霖 , 余良翀 , 高冠斌 , 孙涛垒 . Ag2S基近红外II区荧光量子点的水相合成优化探究[J]. 化学学报, 2021 , 79(10) : 1281 -1285 . DOI: 10.6023/A21070333

Abstract

Growing numbers of quantum dots (QDs) have been applied in biological fluorescence imaging, especially those QDs with near-infrared-II fluorescence emission, avoiding the interference of autofluorescence of biological tissues, have broad application prospects in the field of fluorescence imaging. In particularly, Ag2S quantum dots (Ag2S QDs) have drew great attention of researchers in biological fluorescence imaging due to the near-infrared fluorescence emission, large Stokes shift, good light and chemical stability. However, the Ag2S QDs synthesized in organic phase usually experienced poor water solubility and biocompatibility, while the fluorescence of the Ag2S QDs synthesized in aqueous phase is difficult to reach the near-infrared-II region, which severely restricts the promotion of Ag2S QDs in biological fluorescence imaging. Therefore, it is of great significance to optimize and explore the water-phase synthesis method of Ag2S based quantum dots with near-infrared-II fluorescence emission. The goal of this work is to synthesize Ag2S QDs with near-infrared-II region fluorescence emission by aqueous phase method. First, captopril modified Ag2S QDs (Ag2S@Cap QDs) were prepared in water, and its fluorescence emission peak lied in the near-infrared-II region at 1005 nm. Then a series of Zn:Ag2S@Cap QDs were prepared in aqueous by introducing ZnS to the Ag2S core. The results showed that the fluorescence emission peaks of Zn:Ag2S@Cap QDs blue shifted in a core-doping ZnS-dose dependent manner. Next, a series of Ag2S@Cap-Zn QDs were prepared in aqueous by introducing Zn2+ to the ligand-shell of Ag2S QDs. The fluorescence emission peaks of these Ag2S@Cap-Zn QDs also blue shifted in a Zn2+-dose dependent manner. Finally, Ag2S@MUA QDs were prepared by replacing the shell ligand from Cap to 11-mercaptoundecanoic acid (MUA). The fluorescence emission peak of these Ag2S@MUA QDs red shifted to 1105 nm, locating in the near-infrared-II region, and the width of the fluorescence curve at half-maximum height became narrower, implying better application prospect in biological fluorescence imaging. This work not only successfully prepared a kind of Ag2S QDs with near-infrared-II fluorescence emission in aqueous phase, but also opened an avenue for the preparation and optimization of semiconductor QDs with near-infrared fluorescence.

Key words： near-infrared-Ⅱ fluorescence; Ag2S QDs; aqueous synthesis; core-doping; cationic-modification; optimizing surface ligand

参考文献

[1]
Sang, R.; Xu, X.; Wang, Q.; Fan, Q.; Huang, W. Acta Chim. Sinica 2020, 78, 901. (in Chinese)
[1]
(桑若愚, 许兴鹏, 王其, 范曲立, 黄维, 化学学报, 2020, 78, 901.)
[2]
Zhang, M.; Yue, J.; Ran, C.; Ma, Z.; Dai, H. Proc. Natl. Acad. Sci. Belarus-Agrar. Ser. 2018, 115, 201806153.
[3]
Gao, G.; Gong, D.; Zhang, M.; Sun, T. Acta Chim. Sinica 2016, 74, 363. (in Chinese)
[3]
(高冠斌, 龚德君, 张明曦, 孙涛垒, 化学学报, 2016, 74, 363.)
[4]
Alivisatos, A. P. Science 1996, 271, 933.
[5]
Niu, Z. Natl. Sci. Rev. 2017, 4, 167.
[6]
Mo, D.; Hu, L. Zeng, G.; Chen, G.; Wan, J.; Yu, Z.; Huang, Z.; He, K.; Zhang, C.; Cheng, M. Appl. Microbiol. Biotechnol. 2017, 101, 2713.
[7]
Zhu, J.; Tang, Y.; Wang, G.; Mao, J.; Liu, Z.; Sun, T.; Wang, M.; Chen, D.; Yang, Y.; Li, J.; Deng, Y.; Yang, S. ACS Appl. Mater. Interfaces 2017, 9, 14470.
[8]
Feng, Y.; Wang, X.; Huang, J.; Dong, P.; Wang, C. Chem. Eng. J. 2020, 390, 124525.
[9]
Murray, C. B.; Norris, D. J.; Bawendi, M. G. J. Am. Chem. Soc. 1993, 115, 8706.
[10]
Hocaoglu, I.; Natali, M.; Erdem, R.; Ozen, C.; Kurt, A.; Sennaroglu, A.; Acar, H. J. Mater. Chem. 2012, 22, 14674.
[11]
Du, Y.; Xu, B.; Fu, T.; Cai, M.; Li, F.; Zhang, Y.; Wang, Q. J. Am. Chem. Soc. 2010, 132, 1470.
[12]
Luo, X.; Chen, M.; Yang, Q. Acta Chim. Sinica 2020, 78, 373. (in Chinese)
[12]
(罗兴蕊, 陈敏文, 杨晴来, 化学学报, 2020, 78, 373.)
[13]
Wang, J.; Yang, F.; Gao, G.; Sun, T. J. Inorg. Mater. 2019, 34, 1156.
[13]
(王君诚, 杨菲菲, 高冠斌, 孙涛垒, 无机材料学报, 2019, 34, 1156.)
[14]
Gan, Z.; Liu, Y.; Wang, L.; Jiang, S.; Xia, N.; Yan, Z.; Wu, X.; Zhang, J.; Gu, W.; He, L.; Dong, J.; Ma, X.; Kim, J.; Wu, Z.; Xu, Y.; Li, Y.; Wu, Z. Nat. Commun. 2020, 11, 5572.
[15]
Guo, J.; Guo, M.; Wang, F.; Jin, W.; Chen, C.; Liu, H.; Li, Y. Angew. Chem., Int. Ed. 2020, 59, 16712.
[16]
Thiessen, A. N.; Zhang, L.; Oliynyk, A. O.; Yu, H.; O'Connor, K. M.; Meldrum, A.; Veinot, J. G. C. Chem. Mater. 2020, 32, 6838.
[17]
Medintz, I. L.; Uyeda, H. T.; Goldman, E. R.; Mattoussi, H. Nat. Mater. 2005, 4, 435.
[18]
Valizadeh, A.; Mikaeili, H.; Samiei, M.; Farkhani, S. M.; Zarghami, N.; Kouhi, M.; Akbarzadeh, A.; Davaran, S. Nanoscale Res. Lett. 2012, 7, 480.
[19]
Peng, Z. A.; Peng, X. J. Am. Chem. Soc. 2001, 123, 183.
[20]
Anc, M. J.; Pickett, N. L.; Gresty, N. C.; Harris, J. A.; Mishra, K. C. ECS J. Solid State Sci. Technol. 2013, 2, 3071.
[21]
Xu, Y.; Zhao, Y.; Zhang, Y.; Cui, Z.; Wang, L.; Fan, C.; Gao, J.; Sun, Y. Acta Chim. Sinica 2018, 76, 393. (in Chinese)
[21]
(徐毅, 赵彦, 张叶俊, 崔之芬, 王丽华, 樊春海, 高基民, 孙艳红, 化学学报, 2018, 76, 393.)
Options
文章导航

/

〈 〉