Synthesis of new 14- and 15-crown-formazans and their evaluation in spectrophotometric determination of lithium

被引：15

作者：

Ibrahim, YA ^{[1
]}

Barsoum, BN ^{[1
]}

Elwahy, AHM ^{[1
]}

Khella, SK ^{[1
]}

机构：

[1] Cairo Univ, Fac Sci, Dept Chem, Giza, Egypt

来源：

SUPRAMOLECULAR CHEMISTRY | 1998年 / 9卷 / 01期

关键词：

crown-formazans; lithium; spectrophotometric;

D O I：

10.1080/10610279808034960

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The two new crown-formazans 1 and 2 with 14- and 15-membered rings have been synthesized, characterized and investigated as a selective spectrophotometric chelating agents for lithium. The effect of sodium ion concentration on the background lithium signal was studied. Sodium causes depression of the lithium signal and the relative effect diminishes as the total sodium concentration is increased. In a background sodium containing 140 mM sodium, a 10 mM increment of sodium is equivalent to 0.0017 mM Lithium using compound 1 and 0.0024 mM using compound 2.

引用

页码：5 / 12

页数：8

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