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Coordination Compounds: Polydentate Pyridine/Pyrazine Alcohol Ligands, Eco-Friendly Synthesis, Crystal Structures...
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Coordination Compounds: Polydentate Pyridine/Pyrazine Alcohol Ligands, Eco-Friendly Synthesis, Crystal Structures and Stability

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

Deadline for manuscript submissions: closed (31 August 2023) | Viewed by 1111

Special Issue Editor

Dr. Mahsa Armaghan

E-Mail Website
Guest Editor
Institute for Inorganic Chemistry and Structural Chemistry, Heinrich Heine University Düsseldorf, Universitätsstraße 1, D-40225 Dusseldorf, Germany
Interests: nano adsorbents/sorbents for the removal pollutants; metal-organic frameworks; crystal engineering of organic-inorganic hybrid materials

Special Issue Information

Dear Colleagues,

Pyridine alcohol- and pyrazine alcohol-based ligands are versatile N,O-chelating or bridging organic linkers. Due to their rich σ-donation and strong coordination toward a wide range of transition metal ions, a large family of structures can be afforded, varying from coordination complexes to coordination polymers of different dimensionality (see Graphical Abstract above).

Ligands based on pyridine alcohol and pyrazine alcohol have a high tendency to coordinate to transition metal ions and they demonstrate potential to create a variety of molecular/polymeric coordination compounds. Owing to their polar groups (N and OH), pyridine/pyrazine alcohol ligands are well soluble in water, which is important  for their roles in biochemistry, and they provide the possibility of synthesis in aqueous environments. Furthermore, they have the potential to form strong hydrogen bonds with solvents or host molecules via noncovalent interactions, such as hydrogen bonding.

The scope of this Special Issue covers research on the synthesis of coordination compounds by pyridine/pyrazine alcohol ligands, the growth of suitable single crystals and the determination of the crystal structures by X-ray diffraction methods, as well as their potential properties, such as gas or small molecule adsorption, including N2, CO2 and water.

Please note that submissions on both experimental and simulation studies covering these topics are welcome.

Dr. Mahsa Armaghan
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

  • polydentate pyridine/pyrazine alcohol ligand
  • eco-friendly synthesis
  • coordination compounds
  • crystal structure
  • hydrogen bonding

Published Papers (1 paper)

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Research

25 pages, 11433 KiB  
Article
Coordination Polymers with a Pyrazine-2,5-diyldimethanol Linker: Supramolecular Networks through Hydrogen and Halogen Bonds
by Mahsa Armaghan, Tobias Stürzer and Christoph Janiak
Crystals 2023, 13(8), 1193; https://doi.org/10.3390/cryst13081193 - 31 Jul 2023
Viewed by 804
Abstract
In this paper, the synthesis and crystal structure of pyrazine-2,5-diyldimethanol (pyzdmH2, C6H8N2O2), a new symmetric water-soluble N,O-chelating tetra-dentate organic ligand, is reported and an environmentally friendly method is used to synthesize coordination compounds in water [...] Read more.
In this paper, the synthesis and crystal structure of pyrazine-2,5-diyldimethanol (pyzdmH2, C6H8N2O2), a new symmetric water-soluble N,O-chelating tetra-dentate organic ligand, is reported and an environmentally friendly method is used to synthesize coordination compounds in water under ambient conditions, from the reaction of pyzdmH2 with the halide salts of Cu(II), Zn(II), Hg(II) and Cd(II): {[Cu(pyzdmH2)0.5(µ-Br)(Br)(H2O)]·H2O}n 1, {[Zn2(pyzdmH2)(µ-Cl)(Cl)3(H2O)]·H2O}n 2, [Hg2(pyzdmH2)0.5(µ-Cl)2(Cl)2]n 3, {[Cd2(pyzdmH2)(µ-Cl)4]·H2O}n 4, and {[Cd2(pyzdmH2)(µ-Br)4]·H2O}n 5. Single-crystal X-ray diffraction analysis reveals that 1–3 are 1D coordination polymers and 4 and 5 are 3D coordination networks, all constructed by bridging pyrazine-2,5-diyldimethanol and halogen ions. The hydroxyl groups in the organic linker extend the 1D chains to non-covalent 3D networks. In all non-covalent and covalent 3D networks, water molecules are trapped by strong hydrogen bond interactions. Supramolecular analysis reveals strong O-H···O, O-H···N, O-H···X, and weak C-H···O, C-H···X (X = Cl, Br) hydrogen bonds, as well as π-π(pyrazine ring), metal-halogen···π(pyrazine ring), and O-H···ring(5-membered chelate ring) interactions. In addition, X···O weak halogen bonds are present in 1–5 (X = Cl and Br). Full article
(This article belongs to the Special Issue Coordination Compounds: Polydentate Pyridine/Pyrazine Alcohol Ligands, Eco-Friendly Synthesis, Crystal Structures and Stability)
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