以beta-丙氨酸甲/乙酯鹽酸鹽與檸檬酸製備螢光碳奈米點及其檢測

本研究以beta-丙氨酸甲/乙酯鹽酸鹽替代beta-丙氨酸與檸檬酸進行簡單微波方法製備較高量子產率之螢光碳點，反應所用之溶劑為超純水，使製程更為環保，同樣條件及方法下，beta-丙氨酸甲酯鹽酸鹽的螢光量子產率提高較多。以beta-丙氨酸甲酯鹽酸鹽作為起始物而獲得之最終產物達到最高螢光量子產率(30.4%)。該碳點之水溶液在可見光下為淡黃色，在紫外光照射下則發出藍色螢光。實驗所收集之螢光碳點，皆利用螢光光譜儀測量其光激發光的性質，以紫外線-可見光光譜儀測量其最大吸收波長、雷射粒徑之動態光散射分析粒徑、X光繞射儀分析其晶相以及傅立葉紅外線光譜儀鑑定其化學官能基。

In this paper,beta-alanine methyl/ethyl ester hydrochloride was used instead of beta-alanine and citric acid to prepare a higher quantum yield fluorescent carbon dot by simple microwave method. The solvent used in the reaction was ultrapure water. The process is more environmentally friendly.Under the same conditions and methods, the fluorescence quantum yield of beta-alanine methyl ester hydrochloride increased more.The final product obtained with beta-alanine methyl ester hydrochloride as the starting material reached the highest fluorescence quantum yield (30.4%). The aqueous solution of the carbon dots is pale yellow under visible light, and emits blue fluorescence under ultraviolet light.The fluorescent carbon dots collected by the experiment are measured by the fluorescence spectrometer, and the maximum absorption wavelength, the dynamic particle size of the laser particle size, and the X-ray diffractometer are measured by ultraviolet-visible spectrometer. The crystal phase was analyzed and the chemical functional group was identified by Fourier infrared spectrometer.