Fabrication of Aconitic Acid Based Carbon Dots with Multicolor Photolu minescence and Their Applications in Analysis

KeyWord:aconitic acid  carbon dots  emission control  fluorescent sensor  cell imaging

Abstract:

      In this work£¬four types of water soluble carbon dots(CDs) with excellent optical properties were fabricated through hydrothermal(HT) or microwave(MW) assisted approach£¬using aconitic acid(AA) as the carbon precursor£¬and ethylenediamine(EDA) or urea as the co doping reagents.Fluorescence spectroscopy showed that among these CDs£¬three emitted blue fluorescence and one emitted yellow fluorescence.Subsequently£¬one blue fluorescent AA&EDA-HT-CDs with the highest absolute quantum yield of 57% and yellow fluorescent AA&Urea-MW-CDs with an absolute quantum yield of 44% were selected£¬and then a series of detailed characterizations were conducted for the systematical investigation on their size distribution£¬chemical composition and surface groups£¬etc.Furthermore£¬the responses of as prepared CDs toward metal ions as well as their cytotoxicity were evaluated.Finally£¬the prepared AA derived CDs were successfully applied in cellular bioimaging.