基于氨基酸的碳点制备VIP专享

基于氨基酸的碳点制备 摘 要本论文使用色氨酸和苏氨酸、酪氨酸，合成碳点，通过改变碳源、反应物料比、反应温度在 pH 等于 2 的溶剂中制备出不同条件下的碳点（CDs1-CDs8），其中 CDs1 和CDS2 是色氨酸比苏氨酸为 1:3,分别在 150℃和 180℃制备的碳点，CDS3 和 CDS4 是色氨酸比苏氨酸为 1:1，分别在 150℃和 180℃制备的碳点，CDs5 和 CDS6 是色氨酸比酪氨酸为 1:3,分别在 150℃和 180℃制备的碳点，CDS7 和 CDS8 是色氨酸比苏氨酸为 1:1，分别在 150℃和 180℃制备的碳点。观察并记录每种碳点在紫外灯照射下的发光颜色及情况，结合荧光光谱探究反应条件对碳点光学性质的影响。结合红外吸收光谱和紫外-可见吸收光谱研究碳点的表面官能团、元素种类。测定碳点的 pH 依赖性。对金属离子响应检测。以硫酸奎宁为标准物，测定碳点的荧光量子产率。通过上述研究结果得知，色氨酸和苏氨酸更合适用来制备碳点，碳源中所含-OH 越多或温度越高时制备的碳点荧光量子产率较高。 关键词：水热法；碳点；激发波长依赖性；荧光量子产率AbstractIn this paper, tryptophan and threonine, tyrosine, synthetic carbon point, by changing the carbon source, reaction material ratio, reaction temperature in the pH equal to 2 solvent prepared under different conditions of Carbon point (CDs1-CDs8), of which CDs1 and CDS2 is tryptophan than threonine 1:3, The carbon points prepared at 150 and 180 ℃℃ respectively, CDS3 and CDS4 were tryptophan than threonine 1:1, the carbon points prepared at 150 and 180 respectively, CDs5 and CDS6 were tryptophan ratio tyrosine to 1:3,℃℃ respectively, at 150 and 180 to prepare the carbon point, CDS7 and CDS8 were 1:1℃℃ carbon dots prepared by tryptophan than threonine, respectively, at 150 and 180 . The℃℃ luminous color and condition of each carbon point under ultraviolet light were observed and recorded, and the effect of reaction conditions on the optical properties of carbon dots was investigated by fluorescence spectroscopy. The surface functional gr...