Xiang Yao-yao
2010
Citations
0
Influential Citations
0
Citations
Journal
Journal of Zhejiang University of Technology
Abstract
N-(2-carboxyl-5-sulfophenyl)-N'-(5-sulfo-2-hydroxyl-3-aminophenyl)-C-furylformazan copper complex was prepared from 2-amino-4-sulfobenzoic acid by diazotization,reduction,condensation with furfural,complexation and hydrolysis.The influences of diazotization and reduction reactions such as temperature,molar ratio and feeding mode were investigated.The optimum reaction conditions were as follows: the molar ratio of 2-amino-4-sulfobenzoic acid,hydrochloric acid and stannous chloride was 1∶2∶2,the temperature of reduction and condensation was 10 ℃,stannous chloride was dissolved in hydrochloric acid and then dropped into the reaction solution.The yield of 2-(2-(furan-2-ylmethyleme)hydrazingl)-4-sulfobenzoic acid was more than 70% and the structure was confirmed by 1H NMR and MS.The HPLC purity of the final product is above 90%,λmax=632.5 nm.This shows that the maximum absorbed wavelength was red shifted when the central carbon atom was combined with heterocyclic ring,and would open new avenues to explore dark formazan reactive dye.