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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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Recent Advances in Transition Metal Catalysis, 2nd Edition

edited by Dingyi Wang

submission deadline 31 Oct 2025 | 3 articles | Viewed by 3055 | Submission Open

Keywords: transition metal catalysis; photocatalysis; electrosynthesis; organic synthesis; asymmetric synthesis; C-H functionalization; C-C functionalization; C-X functionalization

(This special issue belongs to the Section Organic Chemistry)

Recent Advances in Porous Materials, 2nd Edition

edited by

Xinhua Qi

submission deadline 31 Oct 2025 | 4 articles | Viewed by 2937 | Submission Open

Keywords: porous carbon; adsorption; catalysis; supercapacitor; biomass; energy storage; zeolite; fuel cell; molecular sieves; metal– organic frameworks; porous metal oxide; mesoporous silicon; macroporous resin; aerogel; separation; porous composites; covalent organic frameworks

(This special issue belongs to the Section Materials Chemistry)

Catalytic Materials for Energy and Environment: Preparation, Properties and Applications

edited by

Ana Paula Da Costa Ribeiro

and Yanfei Xu

submission deadline 31 Oct 2025 | 1 articles | Viewed by 2905 | Submission Open

Keywords: biomass conversion; CO2 hydrogenation; plastic degradation; alkane dehydrogenation; syngas conversion; methane reforming; catalysts for energy and environment; catalytic mechanism

(This special issue belongs to the Section Materials Chemistry)

Mesoporous Silica and Related Nanomaterials: Synthesis, Characterization and Applications in Drug Delivery Systems and Green Chemistry

edited by

Cristian Matei

and

Ioniţă Simona

submission deadline 31 Oct 2025 | 2 articles | Viewed by 2722 | Submission Open

Keywords: mesoporous materials; drug delivery; encapsulation; nanoconfinement; adsorption; green chemistry; catalysts immobilization; catalyst recovery; pollutant reduction; renewable materials

(This special issue belongs to the Section Materials Chemistry)

Physicochemical Properties of Innovative Food Products During Processing

edited by

Marta Igual Ramo

and

Irene Peñaranda

submission deadline 31 Oct 2025 | 2 articles | Viewed by 2626 | Submission Open

Keywords: physicochemical properties; innovative foods; food processing; quality and stability; functional foods; safety and shelf life; sensory analysis; texture and rheology; bioactive compounds; emerging food technologies; food sustainability; design of food structures

(This special issue belongs to the Section Food Chemistry)

Synthesis and Biological Evaluation of Coordination Compounds

edited by

Adenilson Oliveira dos Santos

, Francisco Ferreira De Sousa and

Fernando Mendes

submission deadline 31 Oct 2025 | 3 articles | Viewed by 2504 | Submission Open

Keywords: synthetic chemistry; coordination chemistry; biological activity; complexes; drug design; molecular targeting; metal– ligand interactions

(This special issue belongs to the Section Inorganic Chemistry)

Phytochemicals and Bioactivity: Advances in Natural Product Chemistry and Applications

edited by

Mauricio Moncada-Basualto

, Claudio Olea-Azar and

Ady Giordano

submission deadline 31 Oct 2025 | 2 articles | Viewed by 2378 | Submission Open

Keywords: phytochemicals; biological activity; natural products; phytochemical analysis; bioactive compounds; natural product chemistry; plant-based therapeutics; isolation and characterization

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

Lignin: New Insights in Chemistry

edited by

Chiaki Ogino

submission deadline 31 Oct 2025 | 1 articles | Viewed by 2326 | Submission Open

Keywords: lignin valorization; catalytic depolymerization; enzymatic lignin transformation; thermochemical processes; lignin-derived fine chemicals; synthetic biology in lignin research; circular bioeconomy

(This special issue belongs to the Section Green Chemistry)

Processing of Materials by Supercritical Fluids, 3rd Edition

edited by

Stefano Cardea

submission deadline 31 Oct 2025 | 1 articles | Viewed by 2210 | Submission Open

Keywords: supercritical fluids; materials; aerogels; particles; membranes; fibers; scaffolds

(This special issue belongs to the Section Green Chemistry)

Aromatic Heterocyclic Compounds: Synthesis, Reactivity and Applications

edited by

Gilbert Kirsch

submission deadline 31 Oct 2025 | 1 articles | Viewed by 2210 | Submission Open

Keywords: aromatic heterocycles with one heteroatom; aromatic heterocycles with two or more heteroatoms; condensed compounds containing an aromatic heterocycle; direct synthesis; synthesis using electrophilic or nucleophilic reactions; metalation and reactivity; applications of aromatic heterocyclic compounds

(This special issue belongs to the Section Organic Chemistry)

Enantioselective Synthesis, Enantiomeric Separations and Chiral Recognition: 3rd Edition

edited by

Carla Fernandes

Maria Elizabeth Tiritan

and

Madalena Pinto

submission deadline 31 Oct 2025 | 3 articles | Viewed by 2136 | Submission Open

Keywords: enantioselective synthesis; enantioseparation; chiral analyses; chiral recognition; chiral sensors

Essential Oils: Chemical Composition, Bioactive, and Application

edited by

Maria Carla Marcotullio

and Nai-Wen Tsao

submission deadline 31 Oct 2025 | 2 articles | Viewed by 1986 | Submission Open

Keywords: essential oils; chemical constituents; biological activities; extraction methods; analytical chemistry; therapeutic effects; antimicrobial activity; drug delivery

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

Modern Materials in Energy Storage and Conversion—Second Edition

edited by Yuanyuan Zhu,

Yanmin Jia

and

Fujun Li

submission deadline 31 Oct 2025 | 2 articles | Viewed by 1945 | Submission Open

Keywords: modern materials; batteries; supercapacitors; solar cells; catalysis

(This special issue belongs to the Section Materials Chemistry)

Feature Papers in Applied Chemistry: 4th Edition

edited by

Shaojun Yuan

submission deadline 31 Oct 2025 | 2 articles | Viewed by 1796 | Submission Open

Keywords: applied chemistry; new molecules/materials; analytical methods and techniques; electrochemistry and catalysis; new materials and medicines

(This special issue belongs to the Section Applied Chemistry)

Novel Heterocyclic Compounds: Synthesis and Applications

edited by

Mario Orodnez

and José Luis Viveros-Ceballos

submission deadline 31 Oct 2025 | 1 articles | Viewed by 1659 | Submission Open

Keywords: heterocyclic compounds; synthetic methodologies; medicinal chemistry; bioactive molecules; pharmaceutical applications; catalysis in heterocycle synthesis; green chemistry approaches; structure– activity relationships (SARs); organic synthesis; agrochemical applications

(This special issue belongs to the Section Organic Chemistry)

Innovative Approaches to Sustainable Wastewater Treatment—Recent Developments in Hazardous Pollutants Removal

edited by

Anna Wołowicz

and

Monika Wawrzkiewicz

submission deadline 31 Oct 2025 | 3 articles | Viewed by 1615 | Submission Open

Keywords: wastewater treatment; industrial wastewater; physical methods; chemical methods; biological methods; emerging micropollution; dyes; heavy metals; removal; (bio)sorbent; ion exchange resin

(This special issue belongs to the Section Green Chemistry)

Advance in Radiochemistry, 2nd Edition

edited by

Chang-Tong Yang

submission deadline 31 Oct 2025 | 2 articles | Viewed by 1552 | Submission Open

Keywords: radiochemistry; radionuclide (radioisotopes); radiolabeling; radiopharmaceutical (radiotracer); nuclear medicine; theranostics (diagnostics and therapeutics); molecular imaging

(This special issue belongs to the Section Medicinal Chemistry)

Supramolecular Host/Guest Compounds and Their Prospects for Multifunctional Materials

edited by Angela Danil De Namor and Nawal Al Hakawati

submission deadline 31 Oct 2025 | 1 articles | Viewed by 1451 | Submission Open

Keywords: supramolecular chemistry; host-guest chemistry; macrocycles and cages; self-assembly; supramolecular materials

(This special issue belongs to the Section Macromolecular Chemistry)

Photocatalytic Generation of Heterocycles

edited by Zuxiao Zhang and

Gianfranco Favi

submission deadline 31 Oct 2025 | 1 articles | Viewed by 1418 | Submission Open

Keywords: photocatalytic; cyclization; heterocycles

(This special issue belongs to the Section Organic Chemistry)

Recent Advances in Electrochemistry: Analysis and Application

edited by

Xiaolei Sun

and Wenhe Xie

submission deadline 31 Oct 2025 | 1 articles | Viewed by 1405 | Submission Open

Keywords: advanced electrode materials; electrochemical energy storage; bioelectrochemistry applications; nanotechnology in electrochemistry; electrochemical sensors and biosensors; computational electrochemistry; electrochemical water treatment

(This special issue belongs to the Section Electrochemistry)

Back to Nature: Pharmacological Activities of Phytochemicals Isolated from Medicinal Plants

edited by

Arik Dahan

and Ludmila Yarmolinsky

submission deadline 31 Oct 2025 | 1 articles | Viewed by 1273 | Submission Open

Keywords: medicinal plant; pharmacological activity; phytochemical; disease; drug; therapeutic; polyphenol; terpene; carotenoid; saponin; alkaloid; thiophene; sugar; fatty oil; resin; phytosterol; protein; peptide; anti-inflammatory; antidiabetic; neuroprotective; anticancer; antioxidative; antimicrobial; antiviral; antifungal

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

Bioactive Compounds for Brain Ischemia and Neurodegenerative Disease—3rd Edition

edited by

Ramunė Morkūnienė

and

Dalia M. Kopustinskiene

submission deadline 31 Oct 2025 | 1 articles | Viewed by 1267 | Submission Open

Keywords: brain; neuroprotection; neurodegenerative diseases; ischemia; mitochondria; oxidative stress; inflammation; bioactive compounds

(This special issue belongs to the Section Medicinal Chemistry)

Advances in Metal/Oxide Interfacial Catalysts: Design, Properties, and Applications

edited by Mausumi Mahapatra

submission deadline 31 Oct 2025 | 2 articles | Viewed by 1233 | Submission Open

Keywords: oxides; metal– oxide interface; catalysts; active sites; heterogeneous catalysis

(This special issue belongs to the Section Physical Chemistry)

Graphene and Graphene-Related Materials for Energy and Environment: Synthesis and Application

edited by

Saverio Latorrata

and

Andrea Basso Peressut

submission deadline 31 Oct 2025 | 1 articles | Viewed by 1141 | Submission Open

Keywords: graphene; graphene-related materials; energy applications; fuel cells; capacitors; photocatalysis; adsorption

(This special issue belongs to the Section Materials Chemistry)

Metal-Based Molecular Photosensitizers: From Design to Applications

edited by

Yao Sun

submission deadline 31 Oct 2025 | 1 articles | Viewed by 1063 | Submission Open

Keywords: photosensitizers; molecular metal complexes; metal-organic complexes; metal-organic frameworks; photodynamic therapy

(This special issue belongs to the Section Organometallic Chemistry)

Plant Metabolites: Isolation, Phytochemistry, and Biological Activities

edited by

Dagmara Wróbel-Biedrawa

, Karolina Grabowska and

Luca Rastrelli

submission deadline 31 Oct 2025 | 1 articles | Viewed by 1063 | Submission Open

Keywords: isolation; plant metabolites; plant extracts; medicinal plants; biological activity assessment

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

Design and Preparation of New Metal Catalysts for Functional Organic Compounds Synthesis

edited by

Giorgio Facchetti

submission deadline 31 Oct 2025 | 1 articles | Viewed by 1026 | Submission Open

Keywords: transition metal complexes; hybrid catalysts; nanocatalysts; single-atom catalysts; sustainable organic synthesis; natural products

(This special issue belongs to the Section Organometallic Chemistry)

Biological Activity of Metal Complexes: Design and Characterization Strategies

edited by

Enrique González-Vergara

and

María Eugenia Castro

submission deadline 31 Oct 2025 | 1 articles | Viewed by 1022 | Submission Open

Keywords: metal complexes; biological activity; metallodrugs; anticancer: antibacterial; antiviral; antiparasitic: delivery methods; biophysical characterization; DFT; docking

(This special issue belongs to the Section Inorganic Chemistry)

Advances in Metallocene Chemistry

edited by

Karlheinz Sünkel

submission deadline 31 Oct 2025 | 1 articles | Viewed by 969 | Submission Open

Keywords: metallocene; macromolecular chemistry; bio-organometallic chemistry; catalysis

(This special issue belongs to the Section Organometallic Chemistry)

New Insights into High Performance Carbon-Based Electrode Materials

edited by

Yongpeng Cui

and

Chong Xu

submission deadline 31 Oct 2025 | 1 articles | Viewed by 960 | Submission Open

Keywords: carbon materials; energy storage and conversion; battery; supercapacitor; electrode material

(This special issue belongs to the Section Electrochemistry)

Catalytic Green Reductions and Oxidations, 2nd Edition

edited by

Zhanhui Yang

submission deadline 31 Oct 2025 | 1 articles | Viewed by 846 | Submission Open

Keywords: green chemistry; redox reactions; organocatalysis; metal catalysis; heterocatalysis; homocatalysis; photocatalysis; electrocatalysis

(This special issue belongs to the Section Organic Chemistry)

Advanced Functional Membrane Materials: Fabrication and Applications

edited by

Heng Mao

submission deadline 31 Oct 2025 | 1 articles | Viewed by 843 | Submission Open

Keywords: functional membrane material; nanochemistry; polymeric synthesis; molecular design; synthesis method; material processing; catalysis and separation

(This special issue belongs to the Section Applied Chemistry)

Phenolic and Polyphenolic Compounds: Chemistry, Bioactivity and Applications

edited by Krystian Marszalek and

Justyna Szczepańska-Stolarczyk

submission deadline 31 Oct 2025 | Viewed by 822 | Submission Open

Keywords: fruits and vegetables; functional food; polyphenols; antioxidants; food chemistry and food technology; chromatography; bioavailability and bioaccessibility; innovative and non-conventional techniques

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

Innovative Marine Molecules: Chemistry, Biology and Analysis (Volume II)

edited by

Sérgio Sousa

Ana Gomes

and

Ana P. Carvalho

submission deadline 31 Oct 2025 | Viewed by 819 | Submission Open

Keywords: food (product); marine molecules; chemical structure; isolation and purification; characterization; bioactivity; mechanism of action; analysis methods

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

Novel Nanomaterials: Sensing Development and Applications

edited by

Peter Feng

and

Andrew F. Zhou

submission deadline 31 Oct 2025 | 1 articles | Viewed by 775 | Submission Open

Keywords: biosensor; nanomaterials; material design; nanocomposite; sensor; sensor applications

(This special issue belongs to the Section Materials Chemistry)

Redox-Active Molecules as Key Players for Inflammatory Diseases

edited by Ange Mouithys-Mickalad

submission deadline 31 Oct 2025 | Viewed by 762 | Submission Open

Keywords: redox-active Molecules; oxidative stress; inflammatory diseases; QSAR; computer-aided drug design; redox active natural compounds

(This special issue belongs to the Section Medicinal Chemistry)

Exploration and Characterization of Antioxidants from Marine Sources: Isolation, Analysis, and Applications

edited by

Joana Silva

submission deadline 31 Oct 2025 | Viewed by 754 | Submission Open

Keywords: isolation and chemical characterization; structure– activity relationship; marine-derived antioxidants; oxidative stress; in vitro and in vivo models; antioxidant activity; photoprotective activity; antitumural activity; neuroprotection activity; bioavailability and bioaccessibility

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

Chemical Analysis of Organic Contaminants and Microplastics

edited by

João Pinto da Costa

and

Teresa A. P. Rocha-Santos

submission deadline 31 Oct 2025 | 1 articles | Viewed by 687 | Submission Open

Keywords: environment and food; instrumentation; plastic– organic contaminants interactions; life-cycle assessment; (eco)toxicity

(This special issue belongs to the Section Analytical Chemistry)

Functional Coordination Compounds: Design, Synthesis and Applications

edited by Ji-Dong Leng and Wei-Quan Lin

submission deadline 31 Oct 2025 | 1 articles | Viewed by 666 | Submission Open

Keywords: coordination compounds; magnetic materials; luminescence; nonlinear optical; stimuli-responsive; catalytic; sensing

(This special issue belongs to the Section Applied Chemistry)

Discovery, Isolation, and Mechanisms of Bioactive Natural Products (2nd Edition)

edited by

Qiang Zhang

submission deadline 31 Oct 2025 | 1 articles | Viewed by 609 | Submission Open

Keywords: natural products; bioactivities; structural elucidation; mechanisms

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

Young Talents in Medicinal Chemistry

edited by

Arduino A. Mangoni

and

Chiara Brullo

submission deadline 31 Oct 2025 | Viewed by 526 | Submission Open

Keywords: medicinal chemistry; cancer; drug discovery; drug synthesis; pharmacology; toxicology

(This special issue belongs to the Section Medicinal Chemistry)

Design and Synthesis of Novel Adsorbents for Pollutant Removal, 2nd Edition

edited by

Inna V. Melnyk

submission deadline 31 Oct 2025 | 1 articles | Viewed by 526 | Submission Open

Keywords: wastewater treatment; adsorbents; sustainable materials; adsorption mechanisms; surface chemistry; selective adsorption

(This special issue belongs to the Section Physical Chemistry)

Therapeutic Candidates of Inflammation in Chemical Biology

edited by

Sadiq Umar

submission deadline 31 Oct 2025 | Viewed by 443 | Submission Open

Keywords: inflammation; inflammatory-based diseases; immunity; oxidative stress; chemical biology

(This special issue belongs to the Section Chemical Biology)

Wine Electrochemistry: Science, Technology and Industry

edited by

César Augusto Correia de Sequeira

and

Biljana Šljukić

submission deadline 31 Oct 2025 | Viewed by 398 | Submission Open

Keywords: electrochemical sensors; biosensors; wine; ISFETS; CHEMFETs; electronic tongues; amperometric enzymatic biosensors; phenolic antioxidants electrochemistry; oxidation mechanisms of wines; flow-through electrochemistry; electrochemistry of wine wastewater

(This special issue belongs to the Section Electrochemistry)

Novel Catalysts for Asymmetric Synthesis

edited by

Renata Siedlecka

Mariola Zielińska-Błajet

and

Alejandro Baeza Carratalá

submission deadline 31 Oct 2025 | Viewed by 383 | Submission Open

Keywords: chiral ligands; organometallic complexes; organocatalysts; enantioselectivity; asymmetric induction; catalysis

(This special issue belongs to the Section Organic Chemistry)

Conjugated Polymer-Based Materials: Synthesis, Characterization, and Applications

edited by

Bruno Schmaltz

and Nicolas Berton

submission deadline 31 Oct 2025 | Viewed by 350 | Submission Open

Keywords: conjugated polymers; synthesis; characterization; functional π -conjugated materials; conducting materials; organic electronics; organic electrode materials

(This special issue belongs to the Section Materials Chemistry)

Bioproducts for Health, 4th Edition

edited by

María Emilia Brassesco

Ezequiel Coscueta

and

Manuela Pintado

submission deadline 31 Oct 2025 | Viewed by 344 | Submission Open

Keywords: bioactive compounds; health applications; natural sources; purification; downstream processing; sustainability

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

C-H Bond Functionalization of Heterocyclic Compounds

edited by

Dong Wang

submission deadline 31 Oct 2025 | Viewed by 337 | Submission Open

Keywords: heterocycles; C-H activation; transition metal catalysis; site-selectivity; sustainable synthesis; photoredox chemistry; electrochemical functionalization; biologically active molecules

(This special issue belongs to the Section Organic Chemistry)

Synthesis, Bioactivity and Structure–Activity Relationship of Natural Products and Their Derivatives

edited by Jelena R. Đorović Jovanović and

Jelena S. Katanic Stankovic

submission deadline 31 Oct 2025 | Viewed by 330 | Submission Open

Keywords: natural products; structure– activity relationship (SAR); semi-synthetic derivatives; bioactivity; drug discovery; therapeutic potential; pharmaceutical innovation; bioactive compound modification

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

Microwave- and Ultrasound-Assisted Reactions in Organic Chemistry

edited by