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New Insights into the Chemistry of Vanadium

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Inorganic Chemistry".

Deadline for manuscript submissions: closed (1 March 2023) | Viewed by 2227

Special Issue Editor


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Guest Editor
Department of Chemical Sciences, Medical University of Plovdiv, 4004 Plovdiv, Bulgaria
Interests: coordination compounds; ion-association; solvent extraction; cloud point extraction; spectrophotometry; azo dyes; tetrazolium salts; vanadium; transition metals
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Special Issue Information

Dear Colleagues,

Vanadium is a ubiquitous element in the earth's crust. Its presence in the environment is associated with both natural processes and human activity. In recent years, the development of new uses of vanadium has been very dynamic. The areas in which the study of vanadium chemistry is relevant are quite broad, and the advancements achieved have been enormous. The last few decades have been a period of increased research in the field of vanadium chemistry, vanadium biochemistry, and vanadium biological systems, as well as in the medicinal applications of vanadium and in the development of new catalysts, materials, and analytical procedures for vanadium determination and speciation.

This Special Issue aims to highlight the recent advances in the development of vanadium chemistry. It is my pleasure to invite you to submit a manuscript for this Special Issue. Full papers, communications, and reviews are all welcome.

Dr. Kiril B. Gavazov
Guest Editor

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • vanadium
  • vanadium chemistry
  • vanadium inorganic chemistry
  • vanadium biochemistry
  • vanadium-based drugs
  • vanadium determination

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Published Papers (1 paper)

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Research

13 pages, 5464 KiB  
Article
Vanadium-Containing Anionic Chelate for Spectrophotometric Determination of Hydroxyzine Hydrochloride in Pharmaceuticals
by Gergana Kirilova Kirova, Zdravka Yancheva Velkova, Vassil Borisov Delchev and Kiril Blazhev Gavazov
Molecules 2023, 28(6), 2484; https://doi.org/10.3390/molecules28062484 - 8 Mar 2023
Cited by 7 | Viewed by 1607
Abstract
Four azo dyes known to form anionic complexes with V(V) were investigated as potential liquid–liquid extraction–spectrophotometric reagents for the antihistamine medication hydroxyzine hydrochloride (HZH). A stable ion-association complex suitable for analytical purposes was obtained with 6-hexyl-4-(2-thiazolylazo)resorcinol (HTAR). The molar absorption coefficient, limit of [...] Read more.
Four azo dyes known to form anionic complexes with V(V) were investigated as potential liquid–liquid extraction–spectrophotometric reagents for the antihistamine medication hydroxyzine hydrochloride (HZH). A stable ion-association complex suitable for analytical purposes was obtained with 6-hexyl-4-(2-thiazolylazo)resorcinol (HTAR). The molar absorption coefficient, limit of detection, linear working range, and relative standard deviation in the analysis of real pharmaceutical samples (tablets and syrup) were 3.50 × 104 L mol−1 cm−1, 0.13 μg mL−1, 0.43–12.2 μg mL−1, and ≤2.7%, respectively. After elucidating the molar ratio in the extracted ion-association complex (HZH:V = 1:1), the ground-state equilibrium geometries of the two constituent ions—HZH+ and [VO2(HTAR)]—were optimized at the B3LYP level of theory using 6-311++G** basis functions. The cation and anion were then paired in four different ways to find the most likely structure of the extracted species. In the lowest-energy structure, the VO2 group interacts predominantly with the heterochain of the cation. A hydrogen bond is present (V–O···H–O; 1.714 Å) involving the terminal oxygen of this chain. Full article
(This article belongs to the Special Issue New Insights into the Chemistry of Vanadium)
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