Polycrystalline Materials—from Microstructure Characterization to Applications

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

Deadline for manuscript submissions: 20 December 2024 | Viewed by 1619

Special Issue Editors


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Guest Editor
“Coriolan Dragulescu” Institute of Chemistry, Romanian Academy, 300223 Timisoara, Romania
Interests: polycrystaline materials; metal organic frameworks, coordination polymers, post-synthesis of polycrystaline materials, high surface area; morphology tuning, organometallic compounds

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Guest Editor
Dpto Química Inorgánica, Cristalografía y Mineralogía. Facultad de Ciencias. Universidad de Málaga, 29071 Málaga, Spain
Interests: metal phosphonates; coordination polymers; proton conductivity; composite membrane; PEMFCs; electrocatalyst
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Special Issue Information

Dear Colleagues,

In the last few years, significant research efforts have been devoted to designing, fabricating, and exploiting polycrystalline materials. Polycrystalline materials, as a complex structural material, have excellent mechanical, physical, and chemical properties. As a result, polycrystalline materials are widely used in many fields, such as aerospace, automotive, electronics, energy, etc. By understanding and researching the preparation methods, performance characterization, and application fields of polycrystalline materials, reference and guidance can be provided for their further application and development.

This Special Issue links the synthesis process with the crystal structure and microstructure of the compounds produced, as well as their properties and potential applications. We welcome all scientists, scholars, engineers, and experts working in the fields of X-ray diffraction, microstructure analysis, or chemical performance testing to submit your research reports for evaluation and help this Special Issue to provide valuable contributions for the scientific community.

In this regard, we cordially welcome researchers working in the field to submit their contributions on the aforementioned aspects and on other subjects relevant to the theme. Original research articles, reviews, and short communications are all suitable submissions. Organometallic molecules, in addition to purely organic systems, are also deemed suitable for submissions.

Dr. Aurelia Visa
Dr. Rosario Mercedes Pérez Colodrero
Guest Editors

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Keywords

  • polycrystalline materials
  • microstructural analysis
  • polycrystalline thin films
  • solvothermal synthesis
  • mechanism
  • model
  • performance characterization
  • preparation methods
  • porous materials
  • magnetic materials
  • covalent organometallic frameworks
  • post-synthesis of porous materials
  • morphology tuning
  • processing of polycrystalline materials
  • high surface area materials
  • supramolecular interactions
  • metal–organic frameworks (MOFs)
  • layered materials
  • polymers

Published Papers (1 paper)

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Research

18 pages, 1656 KiB  
Article
London Dispersive and Lewis Acid-Base Surface Energy of 2D Single-Crystalline and Polycrystalline Covalent Organic Frameworks
by Tayssir Hamieh
Crystals 2024, 14(2), 148; https://doi.org/10.3390/cryst14020148 - 31 Jan 2024
Cited by 1 | Viewed by 1273
Abstract
This paper is devoted to an accurate determination of the London dispersive, polar free energy of adsorption, Lewis acid γs+ and Lewis base γs components of the polar surface energy γsAB of 2D single-crystalline and polycrystalline [...] Read more.
This paper is devoted to an accurate determination of the London dispersive, polar free energy of adsorption, Lewis acid γs+ and Lewis base γs components of the polar surface energy γsAB of 2D single-crystalline and polycrystalline covalent organic frameworks such as TAPPy-TPA-COFs. The obtained results showed the highest values of polar and total surface energy of the polycrystalline COF relative to those of the single-crystalline COF. Inverse gas chromatography (IGC) at infinite dilution was used to quantify the various surface parameters of the different materials. The net retention times of the adsorption of n-alkanes and several polar solvents on single-crystalline and polycrystalline covalent organic frameworks were obtained from IGC measurements. The free surface Gibbs energy of adsorption was obtained for the various organic molecules at different temperatures from their net retention volume values. The separation between the London dispersive energy and the polar energy of adsorbed molecules was carried out by using a new thermodynamic parameter PSX chosen as new indicator variable and taking into account the deformation polarizability and the harmonic mean of the ionization energies of solvents and solid materials, derived from the London dispersion equation. The obtained results gave higher acidity (KA=0.22) for the 2D polycrystalline COF than that of the single-crystalline COF (KA=0.15) and an equivalent basicity of the two COFs. The obtained results are very promising for the accurate determination of the surface thermodynamic parameters of adsorption of organic solvents on solid surfaces. Full article
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