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Charge-Transfer Complexes (CTCs) and Related Interactions

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A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Organic Crystalline Materials".

Deadline for manuscript submissions: closed (30 October 2023) | Viewed by 2649

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Special Issue Editor

Dr. Abdel Majid A. Adam

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Guest Editor

Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
Interests: metal complexes; charge-transfer complexes; metal-acid complexes; schiff base complexes; metal drug interactions; metal-dye complexes; crystal structures
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Special Issue Information

Dear Colleagues,

Chemical reactions that involve the transfer of an electronically charged particle from an electron-rich donor (D) molecule to an electron-deficient acceptor (A) molecule (D®A) are known as charge-transfer (CT) interactions. The chemistry of charge-transfer (CT) interactions has received considerable interest from researchers year after year because it yields new complexes with unique chemical, physical, and biological properties that render them beneficial in both basic (chemistry, physics, biology, biochemistry) and applied (engineering, material science, industry, technology, pharmacology, medicine) sciences.

We invite researchers to contribute to this Special Issue on “Charge-Transfer Complexes (CTCs) and Related Interactions”. The focus of this Special Issue will be on the charge-transfer complexes (CTCs) and related interactions such as donor–acceptor interaction and hydrogen-bonding interaction. The scope may include research on producing new CTCs and investigating their properties (e.g., spectral, kinetic, photophysical, thermodynamic, crystallographic), as well as the factors that affect the CT interactions (e.g., solvents, time, reagent concentration, temperature). Submissions on theoretical investigations on CTCs and their chemical, physical or biological effects are also welcome.

Dr. Abdel Majid A. Adam
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. Crystals is an international peer-reviewed open access monthly 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 2600 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

charge-transfer complex
donor molcule
acceptor molcule
charge-transfer interaction
donor-acceptor interaction
hydrogen-bonding
theoritical investigations

Published Papers (2 papers)

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Research

13 pages, 4784 KiB

Open AccessArticle

New Organic Crystalline Material Close to Nodal-Line Materials: α′-STF₂IBr₂

by Koki Funatsu, Ryuhei Oka, Naoya Tajima and Toshio Naito

Crystals 2023, 13(11), 1606; https://doi.org/10.3390/cryst13111606 - 20 Nov 2023

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Abstract

Recently, topological materials (TMs) have attracted attention from various scientists. Their electronic properties are governed by relativistic particles called Dirac fermions which, in some cases, possess no masses and move in solids with the speed of light. In addition to the unique particles, such materials exhibit unprecedented electronic properties because of the quantum effects (interference between wavefunctions). Examples include nodal-line materials (NLMs), where metallic or even superconducting properties may appear only at the surface of the single crystals of insulators. Thus far, whether they be organic or inorganic compounds, TMs have hardly been discovered except for the zero-gap conductors (ZGCs), because there is no guideline on how to develop such unusual materials. In this work, we prepared a new organic charge–transfer complex, α′-STF₂IBr₂ (STF = bis(ethylenedithio)diselenadithiafulvalene), which measured the electrical and magnetic properties and calculated the band structure and intermolecular interactions. A close comparison with those of α-STF₂I₃, being established as a ZGC at p > 12–15 kbar, revealed that α′-STF₂IBr₂ is also closely related to it, but belongs to a different type of TMs, namely NLMs. This finding will accelerate the successive findings of NLMs to elucidate the mechanism of their unique electronic properties. Full article

(This article belongs to the Special Issue Charge-Transfer Complexes (CTCs) and Related Interactions)

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17 pages, 13153 KiB

Open AccessArticle

Synthesis of Low-Cost, Bio-Based Novel Adsorbent Material Using Charge-Transfer Interaction for Water Treatment from Several Pollutants: Waste to Worth

by Abdulrahman A. Almehizia, Mohamed A. Al-Omar, Ahmed M. Naglah, Hamad M. Alkahtani, Ahmad J. Obaidullah and Mashooq A. Bhat

Crystals 2023, 13(4), 619; https://doi.org/10.3390/cryst13040619 - 4 Apr 2023

Viewed by 1403

Abstract

Tea is the third most consumed beverage in Saudi Arabia (a country in the Middle East) after water and Arabian coffee. Hence, a large amount of consumed tea leaves is discarded as solid waste. Waste tea leaves (WTLs) have no commercial value and could be considered as an environmentally sustainable costless material. This work aimed to manufacture an adsorbent material from the discarded WTLs and charge-transfer (CT) interaction and use this adsorbent material effectively for the removal of different kinds of pollutants from water. The adsorbent material was manufactured in three steps. First, a CrFeO₃ metal composite was synthesized from the CT interaction between FeCl₃ and CrCl₃ with urea. Second, activated carbons were prepared from consumed WTLs using facile and clean treatments of pre-carbonization, and a simple potassium hydroxide (KOH) activation treatment. Finally, the adsorbent material was fabricated by grounding CrFeO₃ composite with the activated carbons in a 1:10 molar ratio (metal composite to activated carbons). The prepared materials were characterized spectroscopically and morphologically using FT-IR, XRD, SEM/EDX, and TEM analysis. The synthesized absorbent material was used to adsorb two organic dyes (Azocarmine G2; M1, and Methyl violet 2B; M2), and two commercial pesticides (Tiller 480SL; M3, and Acochem 25% WP; M4) from aqueous solution, and it showed promising adsorption efficacy. The minimum adsorbent material’s dosage to obtain a maximum removal efficiency (R%) for M1, M2, M3, and M4 removal from 100 mL solution (100 mg/L) was 0.11, 0.14, 0.13, and 0.12 g, respectively. The max R% for M1 (96.8%) was achieved in the first 45 min, the max R% for M2, 95.5%, was achieved during the first 55 min, and the max R% for M3 (96.4%) was achieved in the first 35 min, while the max R% for M4, 98.6%, was achieved during the first 35 min. Full article

(This article belongs to the Special Issue Charge-Transfer Complexes (CTCs) and Related Interactions)

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