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Molecules publishes Special Issues to create collections of papers on specific topics, with the aim of building a community of authors and readers to discuss the latest research and develop new ideas and research directions. Special Issues are led by Guest Editors, who are experts on the topic and all Special Issue submissions follow MDPI's standard editorial process. The journal’s Editor-in-Chief and/or designated Editorial Board Member will oversee Guest Editor appointments and Special Issue proposals, checking their content for relevance and ensuring the suitability of the material for the journal. The papers published in a Special Issue will be collected and displayed on a dedicated page of the journal’s website. Further information on MDPI's Special Issue policies and Guest Editor responsibilities can be found here. For any inquiries related to a Special Issue, please contact the Editorial Office.

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Cross-Coupling and Related Reactions: Past and New Reactions for the Future

edited by

Viktor Iaroshenko

and Satenik Mkrtchyan

submission deadline 31 Dec 2025 | 1 articles | Viewed by 1555 | Submission Open

Keywords: C-C- cross coupling reactions; C-C bond formation by transition metal catalysis; C-C bond formation by organocatalysis; C-C bond formation by photoredox catalysis; C-C bond formation by enzymatic catalysis; sustainability; green chemistry; new trends in C-C bond formation

(This special issue belongs to the Section Organic Chemistry)

Analytical Chemistry in Asia, 2nd Edition

edited by

Makoto Tsunoda

submission deadline 31 Dec 2025 | 4 articles | Viewed by 1510 | Submission Open

Keywords: analytical chemistry; Asia; HPLC; sample preparation; bioanalysis; mass spectrometry

(This special issue belongs to the Section Analytical Chemistry)

Development and Application of Environmentally Friendly Surfactants

edited by Christina Vakh

submission deadline 31 Dec 2025 | 1 articles | Viewed by 1411 | Submission Open

Keywords: surfactants; green analysis; synthesis of sustainable surfactants; application of sustainable surfactants

(This special issue belongs to the Section Green Chemistry)

Exclusive Feature Papers in Inorganic Chemistry, 3rd Edition

edited by

Andrea Bencini

Vito Lippolis

and

Matteo Savastano

submission deadline 31 Dec 2025 | 4 articles | Viewed by 1397 | Submission Open

Keywords: coordination chemistry; metal complexes; metal-based assemblies; inorganic anions; inorganic materials; coordination polymers; functional materials; chemosensors

(This special issue belongs to the Section Inorganic Chemistry)

The 30th Anniversary of Molecules—Recent Advances in Natural Products Chemistry

edited by

Daniela Rigano

Maria Camilla Bergonzi

Dimitris P. Makris

and

Kyoko Nakagawa-Goto

submission deadline 31 Dec 2025 | 3 articles | Viewed by 1308 | Submission Open

Keywords: natural compounds; bioactive molecules; drug discovery; pharmacological activity; formulations; drug delivery systems; food applications and additives; cosmetic applications; synthesis

(This special issue belongs to the Section Natural Products Chemistry)

Photochemistry in Asia

edited by

Jianzhang Zhao

submission deadline 31 Dec 2025 | 1 articles | Viewed by 1096 | Submission Open

Keywords: photochemistry; photophysics; photocatalysts; synthetic photochemistry; photoelectrochemistry; computational photochemistry; luminescent molecular sensors; nanomaterials; electron transfer; energy transfer

(This special issue belongs to the Section Photochemistry)

Zeolites and Related Materials

edited by Svetlana Mintova and Eddy Dib

submission deadline 31 Dec 2025 | 1 articles | Viewed by 1091 | Submission Open

Keywords: zeolites; crystal growth; structures; molecular interactions; diffusion; in situ

(This special issue belongs to the Section Materials Chemistry)

Nanostructured Materials: Synthesis, Functionalization and Applications in Biomedicine—2nd Edition

edited by

Ying-Jie Zhu

Heng Li

and Hanping Yu

submission deadline 31 Dec 2025 | 2 articles | Viewed by 1005 | Submission Open

Keywords: nanostructured materials; biomaterials; dental materials; biomedicine; biomedical applications; drug delivery; bone defect repair; orthopedic surgery; skin wound healing; anti-tumor; biosensing; bioimaging; diagnosis; therapy

(This special issue belongs to the Section Nanochemistry)

Advances in Electrochemical Nanocomposites

edited by

Bishweshwar Pant

and

Gunendra Prasad Ojha

submission deadline 31 Dec 2025 | 1 articles | Viewed by 981 | Submission Open

Keywords: nanomaterials; nanocomposites; electrocatalysis; electrochemical properties

(This special issue belongs to the Section Applied Chemistry)

Chemical Approaches in Water Treatment: Environmental Toxicology and Hygiene Perspectives

edited by

Antonietta Siciliano

and

Lorenzo Saviano

submission deadline 31 Dec 2025 | 1 articles | Viewed by 961 | Submission Open

Keywords: water treatment technologies; environmental toxicology; hygiene practices; chemical contaminants; eco-friendly water treatment; public health safety; toxicological risk assessment; pollutant removal methods

(This special issue belongs to the Section Green Chemistry)

Food Bioactive Components in Functional Foods and Nutraceuticals

edited by

Maria Aspri

Dimitrios Tsaltas

and

Vlasios Goulas

submission deadline 31 Dec 2025 | 1 articles | Viewed by 882 | Submission Open

Keywords: functional foods; nutraceuticals; bioactive compounds; health benefits; disease prevention; bioavailability

(This special issue belongs to the Section Food Chemistry)

Exclusive Contributions by the Editorial Board Members (EBMs) of the Inorganic Chemistry Section of Molecules 2025

edited by

Athanassios C. Tsipis

submission deadline 31 Dec 2025 | 3 articles | Viewed by 812 | Submission Open

Keywords: inorganic chemistry; coordination chemistry; main-group chemistry; bioinorganic chemistry; solid-state chemistry; organometallic compounds; inorganic cluster chemistry; metal-based assemblies; inorganic anions; inorganic materials; theoretical inorganic chemistry

(This special issue belongs to the Section Inorganic Chemistry)

Phytochemical Investigation of Bioactive Constituents from Medicinal Plants

edited by

Agnieszka Szewczyk

and

Inga Kwiecien

submission deadline 31 Dec 2025 | 1 articles | Viewed by 769 | Submission Open

Keywords: primary metabolites; secondary metabolites; biological activity; phytochemistry; natural products; HPLC-analysis; spectral analysis; medicinal plants

(This special issue belongs to the Section Natural Products Chemistry)

Synthesis, Modification and Application of Heterocyclic Compounds

edited by

Xinwei He

and Yongjia Shang

submission deadline 31 Dec 2025 | 2 articles | Viewed by 731 | Submission Open

Keywords: heterocyclic compounds; synthesis; modification; asymmetric catalysis; cyclization; natural products

(This special issue belongs to the Section Organic Chemistry)

Exclusive Feature Papers in Synthetic Medicinal Chemistry

edited by

Michail Christodoulou

and

Constantinos Athanassopoulos

submission deadline 31 Dec 2025 | 1 articles | Viewed by 686 | Submission Open

Keywords: antitumor activity; antibacterial activity; natural and synthetic compounds

(This special issue belongs to the Section Organic Chemistry)

Recent Advances in Catalysts for Biomass Conversion

edited by

Minghao Li

and Chunlin Chen

submission deadline 31 Dec 2025 | 1 articles | Viewed by 670 | Submission Open

Keywords: biomass utilization; biomass platform chemicals; lignocellulose model compounds; catalysis; bio-based materials

Feature Papers in Photochemistry and Photocatalysis—2nd Edition

edited by

Barbara Bonelli

submission deadline 31 Dec 2025 | 2 articles | Viewed by 662 | Submission Open

Keywords: photocatalytic processes; quantum yield; solar light; upconversion; heterojunctions

(This special issue belongs to the Section Photochemistry)

30th Anniversary of Molecules—Recent Advances in Organic Chemistry

edited by

Maria G. P. M. S. Neves

Antonio Massa

, Antonia Di Mola and

Nuno M. M. Moura

submission deadline 31 Dec 2025 | 1 articles | Viewed by 602 | Submission Open

Keywords: organic synthesis; organic chemistry research; theoretical study; reaction mechanisms; catalysis

(This special issue belongs to the Section Organic Chemistry)

Essential Oils—Third Edition

edited by

Laura De Martino

submission deadline 31 Dec 2025 | Viewed by 547 | Submission Open

Keywords: essential oils; volatile organic compounds (VOCs); chemical fingerprinting; isoprenoids; gas chromatography-mass spectrometry (GC-MS); nuclear magnetic resonance (NMR) spectroscopy; physiological functions of essential oils in plants; molecular mechanisms of essential oils; in vitro and in vivo bioactivities; antimicrobial agents; anti-infective properties; antioxidant potential; allelopathic interactions; biosynthetic pathways; extraction techniques

(This special issue belongs to the Section Natural Products Chemistry)

Silymarin and Derivatives: From Biosynthesis to Health Benefits 2.0

edited by

Dominique Delmas

submission deadline 31 Dec 2025 | Viewed by 467 | Submission Open

Keywords: silymarin: sources and biosynthesis; secondary metabolites and silymarin derivatives; silymarin bioavailability; silymarin and cardiovascular diseases; silymarin and metabolic syndrome; silymarin and cancer; silymarin and inflammation and immune diseases; silymarin and degenerative age-related diseases

(This special issue belongs to the Section Natural Products Chemistry)

New Horizons in Heterogeneous Catalysts: From Design to Applications

edited by

Xingkun Chen

Yuan Tan

and Ziang Zhao

submission deadline 31 Dec 2025 | 1 articles | Viewed by 411 | Submission Open

Keywords: single-atom catalyst; nanocatalyst; heterogeneous catalyst; CO2; ester; alcohol; green chemistry

(This special issue belongs to the Section Green Chemistry)

Functional Foods Enriched with Natural Bioactive Compounds

edited by

Natalia Drabińska

submission deadline 31 Dec 2025 | Viewed by 409 | Submission Open

Keywords: functional food; bioactive compounds; phytochemicals; fortification; valorization; by-products; polyphenols; glucosinolates; gluten-free; probiotics; prebiotics; health benefits; sensory analysis; bioavailability

(This special issue belongs to the Section Natural Products Chemistry)

Analysis of Pesticide Residues in Food and Environmental Samples

edited by

Xu Jing

and Xueke Liu

submission deadline 31 Dec 2025 | 1 articles | Viewed by 390 | Submission Open

Keywords: analytical methods; green analytical chemistry; sample pretreatment; microextraction methods; detection techniques; quantitative determination; degradation pathways; metabolite analysis; toxicity evaluation

(This special issue belongs to the Section Analytical Chemistry)

Peptide Chemistry: Recent Trends and Advancements

edited by Fa-Jie Chen and

Alicja Kluczyk

submission deadline 31 Dec 2025 | Viewed by 348 | Submission Open

Keywords: peptide synthesis; cyclic peptide; peptide ligation; peptide stapling; peptide library; peptide therapy; structure and activity

(This special issue belongs to the Section Medicinal Chemistry)

Active Ingredients in Functional Foods and Their Impact on Health, 2nd Edition

edited by

Anna Puścion-Jakubik

submission deadline 31 Dec 2025 | 1 articles | Viewed by 314 | Submission Open

Keywords: functional foods; active ingredients; bioactive compounds; health impact; nutraceuticals; dietary patterns; personalized nutrition

(This special issue belongs to the Section Food Chemistry)

Computational Chemistry Approach for Materials Design

edited by

Tianwei He

and Lei Zhang

submission deadline 31 Dec 2025 | Viewed by 261 | Submission Open

Keywords: computational materials; catalysts; DFT calculation; machine learning; energy conversion and storage materials

(This special issue belongs to the Section Computational and Theoretical Chemistry)

Bioactive Compounds and Small Molecules with Neuroprotective and Anti-Inflammatory Functions

edited by

Chiara Porro

submission deadline 31 Dec 2025 | Viewed by 184 | Submission Open

Keywords: bioactive foods; small molecules; neuroprotection; anti-inflammatory; inflammasome; neurodegeneration

(This special issue belongs to the Section Natural Products Chemistry)

Applications of Solid-Phase Microextraction and Related Techniques, the Second Edition

edited by

Hiroyuki Kataoka

submission deadline 31 Dec 2025 | Viewed by 181 | Submission Open

Keywords: solid-phase microextraction; micriextraction techniques; extraction sorbents; pharmaceutical analysis; forensic analysis; bioanalysis; environmental analysis; food analysis

(This special issue belongs to the Section Analytical Chemistry)

Isolation, Characterization, and Application of Anticancer Agents from Natural Products

edited by

Ewa Skała

and

Agnieszka Kicel

submission deadline 31 Dec 2025 | Viewed by 181 | Submission Open

Keywords: medicinal plants; bioactive phytochemicals; cytotoxic activity; oxidative stress; anticancer potential; mechanism of action; cancer cells

(This special issue belongs to the Section Natural Products Chemistry)

Advances in Nanomaterials for Biomedical Applications, 2nd Edition

edited by Xueen Jia and Ce Zhang

submission deadline 31 Dec 2025 | Viewed by 160 | Submission Open

Keywords: 2D nanomaterials; metal– organic frameworks (MOFs); metasurfaces; biosensor; drug delivery

(This special issue belongs to the Section Nanochemistry)

Advances in Natural Fiber Composites

edited by

Pietro Russo

submission deadline 31 Dec 2025 | Viewed by 153 | Submission Open

Keywords: natural fibers; polymer composites; natural fiber-reinforced polymers; heterogeneous structures; complex interfaces

(This special issue belongs to the Section Macromolecular Chemistry)

Vibrational Spectroscopy and Imaging for Chemical Application

edited by

Barry K. Lavine

and

Karl Booksh

submission deadline 31 Dec 2025 | Viewed by 141 | Submission Open

Keywords: Raman spectroscopy; infrared spectroscopy; Raman image analysis; infrared image analysis; chemometrics; multiway analysis; multivariate curve resolution; alternating least squares; multivariate image analysis; classification; machine learning

(This special issue belongs to the Section Analytical Chemistry)

Inorganic Chemistry in Europe 2025

edited by

Wolfgang Weigand

and

Sotiris K Hadjikakou

submission deadline 31 Dec 2025 | Viewed by 138 | Submission Open

Keywords: inorganic chemistry (main group and transition metal chemistry); coordination and organometallic chemistry; bioinorganic chemistry; sustainable catalysis and green chemistry; nanotechnology and smart materials; energy storage and conversion; metallodrugs and imaging agents; computational chemistry and AI in material science

(This special issue belongs to the Section Inorganic Chemistry)

Advances in Electrochemical Sensors

edited by

Yixi Xie

submission deadline 31 Dec 2025 | Viewed by 135 | Submission Open

Keywords: electrochemical sensor; modified electrodes; photoelectrochemical sensor; wearable sensor; environmental monitoring; food safety analysis

(This special issue belongs to the Section Electrochemistry)

Exploring Schiff Base Ligands and Their Metal Complexes

edited by

Mihaela Badea

submission deadline 31 Dec 2025 | Viewed by 114 | Submission Open

Keywords: schiff base ligands; complexes; X-ray structure; antimicrobial; antitumor; antiviral activity; catalysts

(This special issue belongs to the Section Inorganic Chemistry)

Pharmaceuticals in the Environment: Micropollutants and Degradation Dynamics

edited by Agnieszka Nowak and

Urszula Guzik

submission deadline 31 Dec 2025 | Viewed by 99 | Submission Open

Keywords: pharmaceuticals; microorganisms; toxicity; micropollutants; biodegradation; biotransformation; advanced oxidation processes; analysis; intermediate identification; chromatography

(This special issue belongs to the Section Green Chemistry)

Innovative Nanostructures for Energy and Environmental Applications

edited by

Janardhan Reddy Koduru

submission deadline 31 Dec 2025 | Viewed by 98 | Submission Open

Keywords: nanostructures; energy conversion; environmental applications; quantum dots; nanowires; graphene; MXenes; metal nitrides; 2D materials; 3D materials; sustainable energy; pollutant removal; synthesis techniques; adsorbents; water purification; sustainable materials; green energy technologies; advanced nanomaterials; multifunctional materials; hydrogen production; catalysis

(This special issue belongs to the Section Materials Chemistry)

The Synthesis and Application of Rare-Earth-Doped Luminescent Materials

edited by

Liang Zhou

and Rui Wang

submission deadline 31 Dec 2025 | Viewed by 93 | Submission Open

Keywords: luminescent materials; molecular design; luminescent mechanisms and processes; display; lighting; detection

(This special issue belongs to the Section Materials Chemistry)

Research on Functional Active Ingredients of Edible Fungi

edited by Tianqiao Yong,

Jia Song

and

Zhaojun Wei

submission deadline 31 Dec 2025 | Viewed by 90 | Submission Open

Keywords: fungi; compounds; biological activities; uric acid; metabolism; diabetes; cancer; virus

(This special issue belongs to the Section Food Chemistry)

Ionic Liquids and Molecular Materials: Advances in Functional Interfaces and Applications

edited by

José C. S. Costa

and

Yuji Matsumoto

submission deadline 31 Dec 2025 | Viewed by 88 | Submission Open

Keywords: ionic fluids; bulk properties; surface and interfacial properties; thin films; vacuum engineering; energy harvesting and storage; functional materials

(This special issue belongs to the Section Physical Chemistry)

Propolis in Human and Bee Health—2nd Edition

edited by

Magdalena Woźniak

and

Izabela Ratajczak

submission deadline 31 Dec 2025 | Viewed by 85 | Submission Open

Keywords: propolis; plant sources; biological activity; bee health; bioactive compounds; pharmacological properties; analytical methods; applications

(This special issue belongs to the Section Natural Products Chemistry)

Degradation of Aromatic Compounds in the Environment

edited by

Urszula Guzik

and

Wojciech Smułek

submission deadline 31 Dec 2025 | Viewed by 77 | Submission Open

Keywords: aromatic compounds; microorganisms; biodegradation; biotransformation; advanced oxidation processes

(This special issue belongs to the Section Organic Chemistry)

Circular Economy: Agri-Food Byproducts as Source of Bioactive Compounds, 2nd Edition

edited by

Domenico Trombetta

and

Antonella Smeriglio

submission deadline 31 Dec 2025 | Viewed by 76 | Submission Open

Keywords: agri-food byproducts; plant extracts; food extracts; essential oils; bioactive compounds; nutraceuticals; micromorphology; phytochemistry; health effects; eco-sustainability

(This special issue belongs to the Section Green Chemistry)

Molecular Dynamics for Chemical Reactions

edited by

Irmgard Frank

submission deadline 31 Dec 2025 | Viewed by 70 | Submission Open

Keywords: ab initio molecular dynamics; reactive dynamics; highly reactive systems

(This special issue belongs to the Section Computational and Theoretical Chemistry)

Recent Advances in Peptide Assembly and Bioactivity

edited by

Wen Li

submission deadline 31 Dec 2025 | Viewed by 61 | Submission Open

Keywords: peptide; self-assembly; co-assembly; stimuli-responsive; bioactivity; biomaterials

(This special issue belongs to the Section Bioorganic Chemistry)

Recent Advances in the Organic Synthesis of Bioactive Natural Compounds and Their Analogs

edited by

Ioannis Kostakis

and

Alexios Leandros Skaltsounis

submission deadline 31 Dec 2025 | Viewed by 60 | Submission Open

Keywords: bioactive natural compounds; organic synthesis; natural products; synthetic methodologies; medicinal chemistry; drug discovery; total synthesis

(This special issue belongs to the Section Natural Products Chemistry)

Nanomaterials in Photochemical Devices: Advances and Applications

edited by

Braulio García-Cámara

submission deadline 31 Dec 2025 | Viewed by 57 | Submission Open

Keywords: nanomaterials; photochemistry; photocatalysis; nanoparticles; energy conversion; environmental remediation; biomedical applications; photoacoustic imaging

(This special issue belongs to the Section Photochemistry)

New Materials for Gas Capture and Conversion

edited by Jie Xu and Yuandong Yang

submission deadline 31 Dec 2025 | Viewed by 55 | Submission Open

Keywords: gas capture; gas conversion; novel sorbents; efficient catalysts; kinetic modelling; thermodynamic analysis; process simulation

(This special issue belongs to the Section Materials Chemistry)

Enzyme Inhibitors: Design, Synthesis and Biological Evaluation—3rd Edition

edited by