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某些杂环偶氮染料及其与一些过渡金属形成的金属配合物的物理分析研究。

Physico-analytical studies on some heterocyclic azo dyes and their metal complexes with some transition metals.

作者信息

El-Seify Fathy A, Azab Hassan A, Degedy Fikrea S, Abdel-Mageed Khalid A, El-Dossoki Farid I

机构信息

Chemistry Department, Faculty of Engineering, Port Said University, Port Said, Egypt.

Chemistry Department, Faculty of Science, Suez Canal University, Ismalia, Egypt.

出版信息

BMC Chem. 2022 May 30;16(1):40. doi: 10.1186/s13065-022-00833-x.

DOI:10.1186/s13065-022-00833-x
PMID:35637518
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9153159/
Abstract

In this investigation, the azo dyes; 2-(3'-phenyl-5'-pyrazolyl azo) schaffer acid (la) and 2-(3'-phenyl-5'-pyrazolyl azo) resorcinol (Ib); were prepared through diazotizing 3-phenyl-5-aminopyrazole (PAP) and coupling the resulting diazonium salt with Schäffer acid and resorcinol respectively. The prepared azo dyes are characterized using both IR spectra and the elemental analysis (C, H, N and S). The prepared azo dyes are used as chromogenic reagents for the spectrophotometric determination of copper (II), nickel (II), cobalt (II) and zinc (II) ions. The conditional acid dissociation constants of these azo dyes (la and Ib) and the stability constants of its metal ion complexes have been determined by spectro-analytical methods. The effect of pH, time, organic solvent and the foreign ions on the spectrophotometric determination of these ions and their complexes with the azo dyes under study were studied. The stoichiometric ratio (M:L) of the formed complexes was also determined. The molar absorptivity, the Sandell's sensitivity values, the obeyance of Beers law and the stability constants of the formed complexes have been also determined and discussed.

摘要

在本研究中，偶氮染料；2-(3'-苯基-5'-吡唑基偶氮) 谢弗酸 (1a) 和 2-(3'-苯基-5'-吡唑基偶氮) 间苯二酚 (1b)；是通过将 3-苯基-5-氨基吡唑 (PAP) 重氮化，并将所得重氮盐分别与谢弗酸和间苯二酚偶合制备而成。所制备的偶氮染料通过红外光谱和元素分析 (C、H、N 和 S) 进行表征。所制备的偶氮染料用作分光光度法测定铜 (II)、镍 (II)、钴 (II) 和锌 (II) 离子的显色剂。这些偶氮染料 (1a 和 1b) 的条件酸解离常数及其金属离子配合物的稳定常数已通过光谱分析方法测定。研究了 pH、时间、有机溶剂和外来离子对分光光度法测定这些离子及其与所研究偶氮染料形成的配合物的影响。还确定了形成配合物的化学计量比 (M:L)。还测定并讨论了形成配合物的摩尔吸光率、桑德尔灵敏度值、比尔定律的遵守情况以及稳定常数。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9171/9153159/4aa5f7cb0a7c/13065_2022_833_Fig9_HTML.jpg
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