EDTA-bonded multi-connected carbon-dots and their Eu3+ complex: preparation and optical properties

Ji, Tianhao1; Fan, Peidong1; Li, Xueli1; Mei, Zhipeng2; Mao, Yongyun2; Tian, Yanqing2

2019

10.1039/c9ra01521c

RSC Advances   影响因子和分区

2046-2069

EDTA-bonded multi-connected carbon-dots (EDTA-C-dots) were prepared from carbon dot precursors and complexed with Eu3+ to give Eu3+-coordinated EDTA-bonded multi-connected carbon dots (Eu-EDTA-C-dots). Whereas EDTA-C-dots were readily soluble in DMSO, Eu-EDTA-C-dots could not be easily dissolved in DMSO, water, or other common organic solvents. The newly prepared materials were thoroughly characterized. The X-ray diffraction results showed that no crystalline phase of Eu oxides (europium oxide or europium hydroxide) could be observed in Eu-EDTA-C-dots. The infrared and UV-Vis spectra showed that coordination with Eu3+ ions did not damage the structure of the EDTA-C-dots. It was found that EDTA could be easily grafted on the surface of carbon dots and EDTA had minimal influence on the photoluminescence of the carbon dot matrix. In contrast, the existence of Eu3+ ions strongly quenched the photoluminescence of Eu-EDTA-C-dots. The measured and fitted decay lifetime indicated that Eu-EDTA-C-dots possessed two photoluminescence decay processes, i.e., radiative recombination and non-radiative recombination.

SCI ; EI

英语

其他

National Natural Science Foundation of China[21774054]

Chemistry

Chemistry, Multidisciplinary

WOS:000465297300023

ROYAL SOC CHEMISTRY

20191606792456

Optical properties ; Photoluminescence

Light/Optics:741.1

Web of Science

1.Beijing Technol & Business Univ, Sci Coll, Beijing 100048, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

Ji, Tianhao,Fan, Peidong,Li, Xueli,et al. EDTA-bonded multi-connected carbon-dots and their Eu3+ complex: preparation and optical properties[J]. RSC Advances,2019,9(19):10645-10650.

Ji, Tianhao,Fan, Peidong,Li, Xueli,Mei, Zhipeng,Mao, Yongyun,&Tian, Yanqing.(2019).EDTA-bonded multi-connected carbon-dots and their Eu3+ complex: preparation and optical properties.RSC Advances,9(19),10645-10650.

Ji, Tianhao,et al."EDTA-bonded multi-connected carbon-dots and their Eu3+ complex: preparation and optical properties".RSC Advances 9.19(2019):10645-10650.