The synthesis and analysis of 3-(4’-Aminophenyl)-1,2 - Benzopyrone Fluorescent Whitening Agents

• Main Authors: Chien,Chih-Che, 簡志哲
• Other Authors: Chen, Jui-Chin
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/73563889137869973101

碩士 === 亞東技術學院 === 應用科技研究所 === 100 === In this study, a series of reactive 3-(4'-aminophenyl)-1,2-benzopyrone fluorescent whitening agents were synthesized, while every preliminary study of the spectral and optical properties and then we still will thorough discussion the relationship of the dyeability of polyester fabrics with fluorescent whitening agents structure. These fluorescence whitening agents were obtained by condensation of salicylaldehyde, 4-hydroxysalicylaldehyde and 4-N,N-diethylaminosalicylaldehyde derivatives with 4-aminophenylacetonitrile in absolute ethanol in the presence of piperidine. Purification of these fluorescence whitening agents was carried out by recrystallization with solvent. The resulting chemical structures of these fluorescence whitening agents were subject to 1H-NMR, mass and FT-IR spectra and their color characteristics were studies by using UV/Vis spectrum and fluorescent spectrum. The yield of FB I-A～FBI-C was obtained about 96-97%, FBII-A～FBII-C was obtained about 80-85% and FBIII-A～FBIII-C was obtained about 62-68%. Introduction of electron-donor groups in the 7(and/or7)-position of 3-(4'-aminophenyl)-1,2-benzopyrone fluorescence whitening agents results in bathochromic shifts of up to 10-55nm; as a result of these shifts, the colour is changed from colorless to yellow. Where both 7-N,N-dialkylamino and 7-hydroxy substituents are present, the electronic effects of the former substituent tend to dominate.