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Crystals
Special Issues
Coordination Environment for Metal Centers in Crystals
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Coordination Environment for Metal Centers in Crystals

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Crystal Engineering".

Deadline for manuscript submissions: closed (15 February 2023) | Viewed by 4146

Special Issue Editors

Dr. Haixiang Han

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Tongji University, Shanghai, China
Interests: nanocrystal structure; X-ray diffraction; single-source precursor design; nanomaterial self-assembly
Dr. Zheng Zhou

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Tongji University, Shanghai, China
Interests: nanocarbon structure; single crystal X-ray diffraction; metal-carbon material

Special Issue Information

Dear Colleagues,

The design of compounds featuring an appropriate metal coordination environment is a constant pursuit in research to realize target properties. The “coordination environment” could be a comprehensive concept that involves metal coordination bonds, geometries, ligand chelating/bridging patterns, etc. Taking a broader view, it can be the metal types, oxidation states, and metal/metal ratios if the compound is in a heterometallic composition. Nevertheless, all of the key variables associated with metal in a coordination compound or nanocrystal may be the key elements to control over the displaying activities of the compounds. Therefore, establishing effective approaches to tune the metal coordination environments is meaningful to design compounds for specific applications.

Dr. Haixiang Han
Dr. Zheng Zhou
Guest Editors

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

  • structure design
  • carbon nanomaterial
  • coordination geometry
  • metal coordination bond
  • crystal field

Published Papers (2 papers)

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Research

14 pages, 3037 KiB  
Article
Antibacterial, Antioxidant and Physicochemical Properties of Pipper nigram Aided Copper Oxide Nanoparticles
by Javeria Aien, Ashfaq Ahmad Khan, Sirajul Haq, Abdul Rehman Khan, Khaled Elmnasri, Manel Ben Ali, Mohammad S. AL-Harbi, Mohammed I. Alghonaim, Sulaiman A. Alsalamah, Ashraf A. Qurtam, Fehmi Boufahja, Amor Hedfi and Mohamed Dellali
Crystals 2023, 13(2), 330; https://doi.org/10.3390/cryst13020330 - 15 Feb 2023
Cited by 11 | Viewed by 1840
Abstract
The Pipper nigram (P. nigram) leaf extract was used for the biosynthesis of copper oxide nanoparticles (CuO NPs) and the successful formation of the resultant product was confirmed through several physicochemical techniques. The chemical structure and the elemental composition were analysed [...] Read more.
The Pipper nigram (P. nigram) leaf extract was used for the biosynthesis of copper oxide nanoparticles (CuO NPs) and the successful formation of the resultant product was confirmed through several physicochemical techniques. The chemical structure and the elemental composition were analysed through Fourier transform infrared (FTIR) and energy dispersive X-ray (EDX) spectroscopies, respectively. The crystalline structure and crystallite size were investigated through an X-ray diffractometer (XRD) and a monoclinic crystallite with a size of 40.68 nm was reported. Even-distributed particles with an average particle size of 49.75 nm were seen in the scanning electron micrograph (SEM), whereas the thermal stability was checked during the thermogravimetric analysis (TGA). The ultra-violet and visible (UV-Visible) spectroscopy was operated to study the light absorbance phenomena and to determine the band gap energy from the absorption edge, which was found to be 1.47 eV. The CuO NPs were used as antibacterial agents against gram-negative bacteria (GNB) and gram-positive bacteria (GPB), and greater inhibition zones were seen against the former one. The antioxidant test was also carried out against 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) free radicals and the antioxidant potential of CuO NPs was found to be higher than ascorbic acid. Full article
(This article belongs to the Special Issue Coordination Environment for Metal Centers in Crystals)
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11 pages, 3362 KiB  
Article
Synthesis, Structure, and Optical Properties of a Molecular Cluster Cd4(p-MBT)10
by Cheng Xu, Zheng Zhou and Haixiang Han
Crystals 2022, 12(9), 1236; https://doi.org/10.3390/cryst12091236 - 01 Sep 2022
Viewed by 1687
Abstract
The creation of atomically precise nanoclusters has become an important research direction in nanoscience, because such nanomaterials can demonstrate unique chemo-physical properties that are significantly different from their corresponding bulk materials. The cause of such disparities lies in their different construction pattern for [...] Read more.
The creation of atomically precise nanoclusters has become an important research direction in nanoscience, because such nanomaterials can demonstrate unique chemo-physical properties that are significantly different from their corresponding bulk materials. The cause of such disparities lies in their different construction pattern for the atomic structures, in which the bulk materials display a highly symmetric, extended atomic lattice, while the ultrasmall nanoclusters feature low symmetric molecular structures. In this work, we report a new [HNEt3]2[Cd4(SC7H7)10] (denoted as Cd4(p-MBT)10, p-MBT = p-methylbenzene thiolate) nanocluster obtained through a one-pot synthetic pathway, and its atomic structure was revealed by single crystal X-ray diffraction technique. It shows that the molecular structure for Cd4(p-MBT)10 demonstrates the embryonic features of the corresponding bulk CdS. That is, the whole structure is built from four [CdS4] units which are connected to each other by shared corner S atoms. Due to the molecular nature, the structure of Cd4(p-MBT)10 is distorted, which yields two enantiomeric isomers with chiral Cd-S frameworks that co-crystallize into a non-chiral space group. In addition, the electronic structure was characterized by photoluminescence spectroscopy and calculated by density functional theory. Full article
(This article belongs to the Special Issue Coordination Environment for Metal Centers in Crystals)
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