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Crystals
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Feature Papers on “Hybrid and Composite Crystalline Materials” 2025
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Feature Papers on “Hybrid and Composite Crystalline Materials” 2025

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

Deadline for manuscript submissions: 31 December 2025 | Viewed by 1010

Special Issue Editor

Prof. Dr. Leonid M. Kustov

E-Mail Website
Guest Editor
1. Chemistry Department, Moscow State University, Moscow, Russia
2. N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Russia
Interests: catalysis; metal nanoparticles; bimetallic particles; supported metals; spectroscopy
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue entitled “Feature Papers on “Hybrid and Composite Crystalline Materials” 2025” covers topics related to the chemistry and structure of various hybrid and composite crystalline materials, the design and engineering of these materials, and their applications. Hybrid and composite crystalline materials include, inter alia, coordination polymers; metal–organic frameworks; covalent organic frameworks; hierarchical zeolites and zeolite-like materials; organic–inorganic hybrids; composites based on graphene, carbon nitride, layered sulfides or MXenes; and composites based on metal, metal oxide, metal chalcogenide, or metal pnictide nanoparticles stabilized with organic ligands or polymers (such nanoparticles can be either unsupported or supported onto appropriate matrices). Other topics related to the design and application of hybrid and composite crystalline materials are welcome. For example, coordination chemistry, the influence of intermolecular interactions on the geometry and arrangement of species constituting hybrid and composite crystalline materials, and cooperative and synergistic effects will all be considered.

For this Special Issue, we aim to publish high-quality articles within the field of hybrid and composite crystalline materials. Please feel free to contact Mr. Mars Tan (mars.tan@mdpi.com) if you would like to contribute to this Special Issue.

Prof. Dr. Leonid M. Kustov
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 2100 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

  • hybrid materials
  • composite materials
  • intermolecular interactions
  • molecular crystals
  • coordination polymers
  • metal–organic frameworks
  • covalent organic frameworks
  • hierarchical zeolites
  • zeolite-like materials
  • organic–inorganic hybrids
  • graphene
  • carbon nitride
  • layered sulfides
  • metal nanoparticles
  • metal oxide nanoparticles
  • metal chalcogenide nanoparticles
  • metal pnictide nanoparticles
  • MXenes

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Further information on MDPI's Special Issue policies can be found here.

Related Special Issue

Published Papers (3 papers)

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Research

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14 pages, 5702 KiB  
Article
Co0.85Bi0.15Fe1.9X0.1O4 (X = Ce4+, Sm3+, Ho3+, and Er3+) Nanoparticles with Selective Anticancer Activity: A Structural and Morphological Approach
by Liza Saher, Adel Benali, Saoussen Haddad, Essebti Dhahri, Manuel P. F. Graça, Benilde F. O. Costa, Luisa A. Helguero and Artur M. S. Silva
Crystals 2025, 15(5), 482; https://doi.org/10.3390/cryst15050482 - 20 May 2025
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Abstract
In this work, we synthesized the Co0.85Bi0.15Fe1.9X0.1O4 (X = Ce3+, Sm3+, Ho3+, and Er3+) nanoparticles via the auto-combustion method. The cell viability against two breast cancer [...] Read more.
In this work, we synthesized the Co0.85Bi0.15Fe1.9X0.1O4 (X = Ce3+, Sm3+, Ho3+, and Er3+) nanoparticles via the auto-combustion method. The cell viability against two breast cancer cells (MDA-MB-231 and T-47D cells) and the PC3 prostate cancer cells were carefully analyzed and correlated with the structural parameters and particle size values as well as the chemical composition. The produced compounds’ morphological and structural characteristics were performed using scanning transmission microscopy (TEM) and X-ray Diffraction (XRD). For all compounds, the analyses of the XRD experimental data revealed a structurally reversed cubic spinel with space group Fd-3m. All of the compounds had crystallites smaller than 45 nm which concorded well with the particle size values deduced from TEM images. Co0.85Bi0.15Fe1.9Ho0.1O4 nanoparticles induced a high mortality of breast and prostate cancer cells (MDA-MB-231, T-47D, and PC3) while the Co0.85Bi0.15Fe1.9Sm0.1O4 compound (higher particle size) reduced almost 35% of MDA-MB-231 cancer cells. With very low cytotoxicity against normal human cells, the Co0.85Bi0.15Fe1.9Ho0.1O4 nanoparticles play a significant role in the elimination of cancer cells. Full article
(This article belongs to the Special Issue Feature Papers on “Hybrid and Composite Crystalline Materials” 2025)
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21 pages, 13359 KiB  
Article
A Novel Zinc-Based MOF Featuring 2,4,6-Tris-(4-carboxyphenoxy)-1,3,5-triazine: Structure, Adsorption, and Photocatalytic Activity
by Magdalena Angelova, Hristina Lazarova, Vanya Kurteva, Rositsa Nikolova, Rusi Rusew and Boris Shivachev
Crystals 2025, 15(4), 348; https://doi.org/10.3390/cryst15040348 - 8 Apr 2025
Viewed by 266
Abstract
A metal–organic framework, MOF-S1, was synthesized via a solvothermal reaction between 2,4,6-tris-(4-carboxyphenoxy)-1,3,5-triazine (TCPT) and zinc nitrate hexahydrate. Single-crystal and powder X-ray diffraction analyses confirmed the formation of hexagonal rod-shaped crystals with a trigonal (P-31c) structure featuring a two-fold interpenetrated 3D framework. [...] Read more.
A metal–organic framework, MOF-S1, was synthesized via a solvothermal reaction between 2,4,6-tris-(4-carboxyphenoxy)-1,3,5-triazine (TCPT) and zinc nitrate hexahydrate. Single-crystal and powder X-ray diffraction analyses confirmed the formation of hexagonal rod-shaped crystals with a trigonal (P-31c) structure featuring a two-fold interpenetrated 3D framework. A comprehensive characterization—including NMR spectroscopy, thermogravimetric analysis, and surface area measurements (using Langmuir, t-plot, Horváth–Kawazoe, and Dubinin–Radushkevich models)—revealed an ultramicroporous material with a Langmuir surface area of 711 m2/g and a median pore width of ~6.5 Å. Adsorption studies using Congo Red, Methylene Blue, Methyl Orange, and Rhodamine B demonstrated the rapid uptake and effective removal from aqueous solutions, with kinetic modeling indicating a dominant chemisorption mechanism. Photocatalytic tests under UV irradiation yielded degradation efficiencies of ~93% for Methyl Orange and ~74% for Rhodamine B. These findings suggest that MOF-S1 is a promising candidate for wastewater treatment applications and UV-related processes, offering a strong adsorption capacity and thermal stability. Full article
(This article belongs to the Special Issue Feature Papers on “Hybrid and Composite Crystalline Materials” 2025)
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Review

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18 pages, 15306 KiB  
Review
Emission Wavelength Control via Molecular Structure Design of Dinuclear Pt(II) Complexes: Optimizing Optical Properties for Red- and Near-Infrared Emissions
by Hea Jung Park
Crystals 2025, 15(3), 273; https://doi.org/10.3390/cryst15030273 - 15 Mar 2025
Viewed by 497
Abstract
Phosphorescent Pt(II) complexes have garnered significant attention as key components in luminescence-based systems due to their highly efficient emission properties. A notable characteristic of these complexes is their ability to form excimers through strong molecular stacking in concentrated solutions or solid film states. [...] Read more.
Phosphorescent Pt(II) complexes have garnered significant attention as key components in luminescence-based systems due to their highly efficient emission properties. A notable characteristic of these complexes is their ability to form excimers through strong molecular stacking in concentrated solutions or solid film states. This aggregation-driven emission, primarily arising from metal–metal to ligand charge transfer (MMLCT), is influenced by overlapping d-orbitals oriented perpendicular to the square planar structure of the Pt(II) complexes. Although this property hinders the development of pure blue-emitting Pt(II) complexes, it facilitates the design of materials that emit red- and near-infrared (NIR) light. By employing advanced molecular design techniques, dinuclear Pt(II) complexes have been optimized to significantly enhance red and NIR emissions through the modulation of Pt-Pt interactions and adjustments in ligand electron densities. This review elucidates how the control of Pt-Pt distances and strategic ligand modifications can directly influence the emission spectra toward red and NIR regions. A comparative analysis of recent studies underscores the novelty and effectiveness of double-decker-type dinuclear Pt(II) complexes in achieving efficient emission characteristics in the long-wavelength range. These insights may guide the design of molecular structures for next-generation organometallic phosphorescent materials. Full article
(This article belongs to the Special Issue Feature Papers on “Hybrid and Composite Crystalline Materials” 2025)
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