电邮这篇文章 VANADIUM (V) INTERACTION WITH 4-(2′,3′,4′-HYDROXYPHENYL)-3-NITRO-5-SULFOAZOBENZENE IN THE PRESENCE OF CATIONIC SURFACTANTS
- 作者: Mardanova V.I.1, Nagiev H.D.1, Chiragov F.M.1
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隶属关系:
- Baku State University
- 期: 卷 79, 编号 10 (2024)
- 页面: 1104-1109
- 栏目: ORIGINAL ARTICLES
- ##submission.dateSubmitted##: 17.02.2025
- URL: https://bakhtiniada.ru/0044-4502/article/view/280410
- DOI: https://doi.org/10.31857/S0044450224100055
- EDN: https://elibrary.ru/TFLFLP
- ID: 280410
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The complexation of vanadium(V) with 4-(2′,3′,4′- trihydroxyphenyl)-3-nitro-5-sulfoazobenzene (R) in the presence of cationic surfactants (CSs) ”- cetylpyridinium chloride (CPCl),cetylpyridinium bromide (CPBr) and cetyltrimethylammonium bromide (CTMABr). Vanadium(V) c R ata ratio of components 1∶2and pH 5.0-5.5 forms a colored complex that has maximum light absorptionat 449 nm; the reagent under these conditions absorbs light at 395 nm. In the presence of KPA, mixedligand complexes are formed with a component ratio V(V) : R : KPA =1∶2∶2, while a bathochromicshift of the maximum in the absorption spectrum occurs, and the pH value of the maximum complexformation shifts to a more acidic medium compared to the homogeneous ligand complex V(V)-R. The lightabsorption of the complexes V(V) : R : CPCl, V(V) : R : CPBr and V(V) : R : CTMABr is maximum at 457,461 and 466 nm, respectively. The output of the complexes is maximum at pH 3.5-4.0 (V(V) : R : CPCland V(V) : R : CPBr) and at pH 2.5-3.0 (V(V) : R : CTMABr). The formation of homogeneous andmixed ligand vanadium(V) complexes is influenced by reaction time, temperature and concentrations ofreacting components. The values of stability constants found proved the high stability of the resultingmixed ligand complexes. The specific electrical conductivity of complexes under optimal conditions ofcomplex formation was determined by the method of conductometric titration. Calibration graphs for thedetermination of vanadium(V) in the form of homogeneous and mixed ligand complexes are linear. Thein fluence of foreign ions and masking substances on the determination of V(V) in the form of homogeneousand mixed ligand complexes was analyzed and it was shown that in the presence of CSs the selectivity of thereaction significantly increases. The analysis of water samples from Lake Khanbulana, Lankaran districtof the Republic of Azerbaijan, according to the developed methodology, showed the presence of smallamounts of vanadium(V).
作者简介
V. Mardanova
Baku State University
Email: vusala_chem@mail.ru
Faculty of Chemistry Baku, Azerbaijan
H. Nagiev
Baku State UniversityFaculty of Chemistry Baku, Azerbaijan
F. Chiragov
Baku State UniversityFaculty of Chemistry Baku, Azerbaijan
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