期刊
SCIENCE BULLETIN
卷 61, 期 20, 页码 1615-1623出版社
ELSEVIER SCIENCE BV
DOI: 10.1007/s11434-016-1172-1
关键词
Carbon dots; Quinone structure; Detection; Dopamine; Quinone drugs
资金
- National Natural Science Foundation of China [61178035, 61571426, 61671435, 81671845, 81630053, 51428301, 31572343]
- National High Technology R&D Program of China [2015BAI23H01]
- Beijing Natural Science Foundation [4161003]
In this work, we demonstrated that the quinone structure can quench the fluorescence of the carbon dots (CDs). The sensitive determination of dopamine (DA) was studied primarily based on this principle. DA would be transformed into DA quinone under alkaline conditions, which resulted in fluorescence quenching of the CDs. A good linear range from 5 nmol/L to 0.4 mmol/L was obtained and the detection limit was 1 nmol/L. Moreover, the quenching effect of quinone structure on the fluorescence of CDs was confirmed by Fourier transform infrared spectra, time-correlated single-photon counting and X-ray photoelectron spectroscopy. Remarkably, CDs were firstly applied to detect the quinone drugs quantitatively which contained typical quinone structure based on the quenching mechanism. More than this, the sensing platform was demonstrated to provide credible selectivity and satisfactory stability in human serum solution with good liner range. Hence, our practical application and mechanism have showed great potential for diagnostic purposes.
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