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荧光碳点因具有良好的生物相容性和抗光漂白等性质而广受关注.本文报道以血晶素为碳源、在氢氧化钠溶液中水热合成新的碳点,并且对其与小檗碱类生物碱的作用进行了深入探讨.研究发现,该方法制备的荧光碳点粒径分布于2~5 nm之间,具有激发光波长依赖的荧光,且该荧光可被小檗碱类生物碱猝灭.进一步研究其作用机理得知,碳点荧光猝灭源于小檗碱类化合物的吸收作用.其中药根碱猝灭碳点荧光同时可使发射峰红移,且其红移程度与药根碱浓度对数值在2.30~414?mol/L范围内呈良好的线性关系,检测限为1.06?mol/L.
Because of its good biocompatibility and resistance to photo-bleaching, fluorescent carbon dots have attracted much attention.In this paper, a new carbon dots were hydrothermally synthesized in the sodium hydroxide solution using hemin as carbon source, Berberine alkaloids were studied in depth.It was found that the fluorescent carbon dots prepared by this method were distributed between 2 and 5 nm in size and had fluorescence with wavelength dependent excitation light and the fluorescence could be blocked by berberine Quasi-alkaloid quenching.Further study of its mechanism of action that the carbon fluorescence quenching derived from the absorption of berberine compounds.The jatrorrhizine quenching carbon spot fluorescence while the emission peak redshift, and its red The linearity was linear with the logarithm of jatrorrhizine concentration in the range of 2.30-414 mol / L with the detection limit of 1.06 mol / L.