发光学报2023，Vol.44Issue(5)：921-931,11.DOI:10.37188/CJL.20220330
高效紫色荧光碳点制备及光学pH检测应用
Preparation and Application of Highly Fluorescent Purple-emissive Carbon Dots for Optical pH Measurement
摘要
Abstract
The preparation of purple-emissive carbon dots(P-CDs)usually accompanies the disadvantages of com-plicated preparation,low quantum yield(QY)and low fluorescence intensity.Herein,we used o-phenylenediamine(OPD)and m-phenylenediamine(MPD)as nitrogen sources and citric acid(CA)as carbon source to prepare P-CDs.Only using simple one-step hydrothermal method under a low experimental temperature of 120℃,we success-fully obtained highly luminescent P-CDs with absolute QY of 5.3％.The results of XPS and FT-IR revealed that all synthesized P-CDs contained similar functional groups but with different contents.The fluorescence intensity of P-CDs could be effectively regulated by the amount ratio of OPD to MPD.The resulting P-CDs also possessed consider-able photostability and salt stability.Notably,the fluorescence color of P-CDs remarkably transformed into green as the pH being in the range of 1-3 or 10-13.The aforementioned unique pH-dependent fluorescence chromic behav-iors ensured the potential application in the optical pH sensing.关键词
高荧光/紫色荧光碳点/pH光学检测Key words
high luminescence/purple-emissive carbon dots/optical pH sensing分类
数理科学引用本文复制引用
吴聪影,赵雪,刘玉慧,何敬宗,柳仕林,吴琪琳..高效紫色荧光碳点制备及光学pH检测应用[J].发光学报,2023,44(5):921-931,11.基金项目
国家自然科学基金重大项目(52090033/52090030)Supported by National Natural Science Foundation of China(52090033/52090030) （52090033/52090030）
