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New Insights into the Chemistry of Vanadium
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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 1739

Special Issue Editor

Dr. Kiril B. Gavazov

E-Mail Website
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
Special Issues, Collections and Topics in MDPI journals

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

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

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

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 3 | Viewed by 1238
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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