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Molecular Mechanisms and Applications of Spectrophotometric Determination
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Special Issue "Molecular Mechanisms and Applications of Spectrophotometric Determination"

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Physical Chemistry and Chemical Physics".

Deadline for manuscript submissions: closed (31 October 2023) | Viewed by 933

Special Issue Editor

Prof. Dr. Kiril Gavazov

E-Mail Website
Guest Editor
Department of Chemical Sciences, Medical University of Plovdiv, 4004 Plovdiv, Bulgaria
Interests: analytical chemistry; extraction
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Modern chemistry has a powerful arsenal of analytical methods to solve a wide range of problems related to the environment, biochemistry, medicine, technology, agriculture, and everyday life, one of which is UV-Vis spectrophotometry. The main advantages of this method are simplicity, speed, low cost, the preservation of the sample, and availability in almost every chemical laboratory. Its specific areas of application include but are not limited to DNA/RNA purity checks, quality control in industry, environmental monitoring, bacterial culturing, and drug identification. An important aspect of UV-Vis spectrophotometry is its applicability as a convenient tool for understanding the molecular mechanisms of various processes.

The proposed Special Issue (SI) aims to highlight essential issues related to UV-Vis spectrophotometric determinations and reaction mechanisms at the molecular level. It is my pleasure to invite you to submit a manuscript for this SI. Full papers, briefs, and reviews are welcome.

Prof. Dr. Kiril 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. International Journal of Molecular Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. There is an Article Processing Charge (APC) for publication in this open access journal. For details about the APC please see here. 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

  • molecular spectroscopy
  • UV-Vis spectrophotometry
  • determination
  • molecular mechanisms
  • molecular research
  • molecular modeling
  • complex formation
  • sample preparation
  • speciation analysis
  • green analytical chemistry
 

Published Papers (2 papers)

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Research

17 pages, 2673 KiB  
Article
Development of Visible Spectrophotometric Methods for the Determination of Tricyclic Antidepressants Based on Formation of Molecular Complexes with p-Benzoquinones
by
Maria D. Ciuca
and
Radu C. Racovita
Int. J. Mol. Sci. 2023, 24(23), 16744; https://doi.org/10.3390/ijms242316744 - 25 Nov 2023
Viewed by 195
Abstract
Tricyclic antidepressants are commonly employed in the management of major depressive disorders. The present work describes two visible (VIS) spectrophotometric techniques that utilize the formation of charge transfer complexes between four antidepressant compounds, namely, amitriptyline hydrochloride (AMI), imipramine hydrochloride (IMI), clomipramine hydrochloride (CLO), [...] Read more.
Tricyclic antidepressants are commonly employed in the management of major depressive disorders. The present work describes two visible (VIS) spectrophotometric techniques that utilize the formation of charge transfer complexes between four antidepressant compounds, namely, amitriptyline hydrochloride (AMI), imipramine hydrochloride (IMI), clomipramine hydrochloride (CLO), and trimipramine maleate (TRI) acting as electron donors and two p-benzoquinones, namely, p-chloranilic acid (pCA) and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ), serving as electron acceptors. The stoichiometry of the compounds produced exhibited a consistent 1:1 ratio in all instances, as established by Job’s method. Molar absorptivities, equilibrium association constants, and several other spectroscopic properties were determined for all complexes. The developed spectrophotometric techniques were validated intra-laboratory and successfully applied for quantitative assessment of the four antidepressant active ingredients in several commercial pharmaceutical formulations. The methods are relatively simple, fast, and use readily available laboratory instrumentation, making them easily applicable by most quality control laboratories worldwide. Full article
(This article belongs to the Special Issue Molecular Mechanisms and Applications of Spectrophotometric Determination)
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16 pages, 5112 KiB  
Article
Comparative Investigation of the Spectroscopic Behavior Based on High-Concentrated Solution in Nitrogen and Air Atmospheres
by
Xuefei Zhang
,
Ning Duan
,
Linhua Jiang
,
Fuyuan Xu
and
Weidong Li
Int. J. Mol. Sci. 2023, 24(16), 12629; https://doi.org/10.3390/ijms241612629 - 10 Aug 2023
Cited by 1 | Viewed by 461
Abstract
In order to accurately obtain photometric information of high concentration SO42− and other substances in the process industry, the spectroscopy behavior of SO42−, S2−, Ni2+ and Cu2+ in air and nitrogen atmosphere was compared [...] Read more.
In order to accurately obtain photometric information of high concentration SO42− and other substances in the process industry, the spectroscopy behavior of SO42−, S2−, Ni2+ and Cu2+ in air and nitrogen atmosphere was compared based on the UV-visible spectrophotometer with a nitrogen replacing the oxygen. Different from Ni2+ and Cu2+, the accuracy of SO42− and S2− in the ultraviolet region was effectively improved by using a nitrogen atmosphere (P detection results were regressed within the limited standard range, RE < 5%). The nitrogen atmosphere suppressed the additional light attenuation caused by its absorption of ultraviolet rays by isolating oxygen and was also reflected in the decrease in the degree of red shift of the characteristic wavelength for SO42− with increasing concentration. Therefore, the detection results of SO42− showed an effective improvement in sensitivity. Nevertheless, according to the complementary experimental results and theoretical calculations, in addition to oxygen absorption, the low detection accuracy of SO42− high concentration is also attributed to the reduction of the energy required for electronic excitation per unit group caused by the interaction between SO42− groups, resulting in a deviation of the C-A curve from linearity at high concentrations. The influence of this intermolecular force on the detection results is far more important than oxygen absorption. The research can provide reliable theoretical guidance and technical support for the pollution-free direct measurement of high-concentration solutions in the process industry and promote the sustainable development of the process industry. Full article
(This article belongs to the Special Issue Molecular Mechanisms and Applications of Spectrophotometric Determination)
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