1-(5′-溴-2′-吡啶基)-5-4′-硝基苯基)-3-(2′-呋喃基)甲(月朁)的合成及其与锌显色反应的研究

高等学校化学学报 ›› 1987, Vol. 8 ›› Issue (5): 421.

1-(5′-溴-2′-吡啶基)-5-4′-硝基苯基)-3-(2′-呋喃基)甲(月朁)的合成及其与锌显色反应的研究

杨桂法, 易建红, 向红

湖南大学化学化工系

收稿日期:1985-12-25 出版日期:1987-05-24 发布日期:1987-05-24

Syntheses of New Colour Reagent 1-(5'-Bromo-Pyridyl)-5-(4'-Nitro-Phenyl)-3-(2'-Futyl) Formazne and Investigation of Its Colour Reaction with Zinc

Yang Guifa, Yi Gianhong, Xiang Hong

Department of Chemistry Chemical Engineering Hunan University, Changsha

Received:1985-12-25 Online:1987-05-24 Published:1987-05-24

摘要/Abstract

摘要： 甲(月朁)类试剂是有色金属离子的优良显色剂。它们的各种取代衍生物,有许多作为分析试剂已被研究。近年来,为了改善该类试剂的分析性能,在甲(月朁)骨架上接上吡啶、噻唑、眯唑及呋喃等杂环基团,合成了一系列不对称型的杂环甲(月朁)。本文报导5-Br-PNPFF试剂的合成和提纯方法。

Abstract: The synthesis and purification of a new colour reagent l-(5'-bromo-2'-pyridyl)-5-(4/-nitrophenyl)-3-(2'-Furyl ) formazane were investigated. This reagent combines with zinc ions in the presence of nonionic surfactant Twcen-80 in a buffer solution of pH 8.0-10.0 to form a blue-green complex. The complex has an maximum absorption at 688nm with a molar absorptivity of 5.96×10⁴l·mol^-1·cm^-1. Beer's law is obeyed in the range of 0-4.2μg/10ml for Zn(Ⅱ). The method has been applied to the spectrophotometric determination of micro-amount zinc in ores, with good results.

TrendMD:

杨桂法, 易建红, 向红. 1-(5′-溴-2′-吡啶基)-5-4′-硝基苯基)-3-(2′-呋喃基)甲(月朁)的合成及其与锌显色反应的研究. 高等学校化学学报, 1987, 8(5): 421.

Yang Guifa, Yi Gianhong, Xiang Hong . Syntheses of New Colour Reagent 1-(5'-Bromo-Pyridyl)-5-(4'-Nitro-Phenyl)-3-(2'-Futyl) Formazne and Investigation of Its Colour Reaction with Zinc. Chem. J. Chinese Universities, 1987, 8(5): 421.