Study on Influence of Endogenous Derivatives on Chemical Sensing Performance of Carbon Dots
10.19756/j.issn.0253-3820.241049
- VernacularTitle:内源性衍生物对碳点化学传感性能的影响
- Author:
Ying-Xi QIN
1
;
Yu WANG
;
Li-Hua YANG
;
Zi-Wei LIU
;
Ai-Miao QIN
;
Liang FENG
Author Information
1. 桂林理工大学材料科学与工程学院,桂林 541004;中国科学院大连化学物理研究所,分离分析化学中国科学院重点实验室,大连 116023
- Keywords:
Endogenous derivatives;
Carbon dots;
Chemical sensing;
Detection of metal ion;
Fe3+sensing mechanism
- From:
Chinese Journal of Analytical Chemistry
2025;53(1):94-103
- CountryChina
- Language:Chinese
-
Abstract:
The blue fluorescent carbon dots(TMCDs)and cyan fluorescent carbon dots(TMCDs-H2O)were synthesized fromm-phenylenediamine and tricarballylic acid through air-assisted melting polymerization and one-step hydrothermal method,respectively.Air purging could effectively inhibit the side reactions and reduce the derivative structures in the carbon dots product.The structure and morphology of these two materials were systematically characterized using liquid nuclear magnetic resonance spectroscopy(NMR),mass spectrometry(MS),and transmission electron microscopy.Compared to TMCDs-H2O((3.12±0.63)nm),TMCDs showed a smaller average particle size(approximately(1.85±0.02)nm).The NMR and MS analysis revealed that although the main structure of both types of carbon dots was similar,TMCDs exhibited a simpler structure with higher degree of polymerization.These results suggested that supramolecular interactions might introduce numerous small molecule derivatives into TMCDs-H2O particles,resulting in lower polymerization degree,multiple substructures,and larger particle size characteristics for this material.When employed as chemical sensors for metal ion detection,in the linear range of 1×10-5-5×10-4 mol/L,the detection limits of Fe3+by TMCDs and TMCDs-H2O were 3.3×10-6 mol/L and 3.8×10-6 mol/L,respectively.The experimental results demonstrated that the recoveries of CDs and inductively coupled plasma optical emission spectrometer(ICP-OES)were similarity,whereas TMCDs displayed a considerable relative standard deviation.This study demonstrated that endogenously derived structures in CDs could enhance the performance of metal ion sensing.
