几种溴代喹啉偶氮衍生试剂的合成及其分析性能的比较

Synthesis of some bromoquinolylazo derivatives and preliminary comparison of their analytical characteristics

合成了6种由8-氨基喹啉重氮盐制备的偶氮化合物,其中有5种溴代喹啉偶氮化合物及一种喹啉偶氮间二乙氨基酚。比较了这些试剂与钴、镍、铜和铁等金属离子的显色反应。其中4-(5,7-二溴-8-喹啉偶氮)-1,3-萘二酚及2-(8-喹啉偶氮)-5-二乙氨基酚对钴(Ⅱ)(ε=5.27×10~4,7.30×10~4),镍(Ⅱ)(ε=5.82×10~4,6.69×10~4)是比较好的显色剂。2-(5,7-二溴-8-喹啉偶氮)-1,8-二羟基萘-3,6-二磺酸及2-(5,7-二溴-8-喹啉偶氮)-5-二乙氨基酚可与铁(Ⅱ)显色。

Six quinolylazo derivatives have been synthesized andcompared qualitatively as analytical reagents for cobalt(Ⅱ),nickel(Ⅱ),copper(Ⅱ)and iron(Ⅱ),4-(5,7-Dibromo-8-quinolylazo)-naphthoresorcin and 2-(8-qui-nolylazo)-5-diethyl-aminophenol are better color reagentsfor cobalt(Ⅱ)and nickel(Ⅱ)(for cobalt(Ⅱ),ε=5.27×10~4,λ_(max)=560nm;ε=7.30×10~4,λ_(max)=550nm;for nickel(Ⅱ),ε=5.82×10~4,λ_(max)=550nm;ε=6.69×10~4,λ_(max)=540nm).2-(5,7-Dibromo-8-quinolylazo)-1,8-dihydroxy-naphthol-3,6-disulphonic acid and 2-(5,7-dibromo-8-quinolylazo)-5-diethylaminophenol are better color reagentsfor Fe(Ⅱ)(ε=2.44×10~4,λ_(max)=360nm;ε=2.44×10~4,λ_(max)=432nm).