A new fluorescence quenching method for the determination of trace mercury has been established.This method is based on the facts that 2,3-dihydro-9,10-dihydroxy-1,4-anthraquinone（R）can emit strong and stable fluore...A new fluorescence quenching method for the determination of trace mercury has been established.This method is based on the facts that 2,3-dihydro-9,10-dihydroxy-1,4-anthraquinone（R）can emit strong and stable fluorescence in HCl solution with α,α’-dipyridine,and α,α’-dipyridine can activate Hg2+ catalyzing the reaction of H2O2oxidizing R to non-fluorescence complex which cause the fluorescence quenching.The regression equation of working curve can be expressed as △If = 10.19 + 199.9 C Hg2+（ng/mL）（r = 0.9994,n =5）.The limit detection（LD） is 7.2 × 10-13g Hg2+/mL（n=11）.The sample containing 0.0040 and 0.40ng/ml Hg2+ are repeatedly determined for 11 times.RSD are 2.2% and 3.4% respectively.R is synthesized in this paper.Meanwhile,the structure is determined by 1H-NMR,IR,MS and UV-Vis spectroscopy.展开更多
The reduction products of hydroxyl anthraquinone by using zinc powder in acetic acid were(obtained).The C[ZJLX,Y]C bonds on the anthraquinone ring can be reduced by the zinc in the acetic acid and the carbonyls of ant...The reduction products of hydroxyl anthraquinone by using zinc powder in acetic acid were(obtained).The C[ZJLX,Y]C bonds on the anthraquinone ring can be reduced by the zinc in the acetic acid and the carbonyls of anthraquinone are not reduced.After the hydroxyls of anthraquinone have been protected,the carbonyls of(anthraquinone) are reduced and the C[ZJLX,Y]C bonds on the anthraquinone ring not reduced.Four new reduction products of anthraquinone were prepared with this method.The structures of these products were confirmed by NMR,IR and MS.展开更多
文摘A new fluorescence quenching method for the determination of trace mercury has been established.This method is based on the facts that 2,3-dihydro-9,10-dihydroxy-1,4-anthraquinone（R）can emit strong and stable fluorescence in HCl solution with α,α’-dipyridine,and α,α’-dipyridine can activate Hg2+ catalyzing the reaction of H2O2oxidizing R to non-fluorescence complex which cause the fluorescence quenching.The regression equation of working curve can be expressed as △If = 10.19 + 199.9 C Hg2+（ng/mL）（r = 0.9994,n =5）.The limit detection（LD） is 7.2 × 10-13g Hg2+/mL（n=11）.The sample containing 0.0040 and 0.40ng/ml Hg2+ are repeatedly determined for 11 times.RSD are 2.2% and 3.4% respectively.R is synthesized in this paper.Meanwhile,the structure is determined by 1H-NMR,IR,MS and UV-Vis spectroscopy.
文摘The reduction products of hydroxyl anthraquinone by using zinc powder in acetic acid were(obtained).The C[ZJLX,Y]C bonds on the anthraquinone ring can be reduced by the zinc in the acetic acid and the carbonyls of anthraquinone are not reduced.After the hydroxyls of anthraquinone have been protected,the carbonyls of(anthraquinone) are reduced and the C[ZJLX,Y]C bonds on the anthraquinone ring not reduced.Four new reduction products of anthraquinone were prepared with this method.The structures of these products were confirmed by NMR,IR and MS.
