Related Experiment Video
Updated: Jan 12, 2026

Electroactive Polymer Nanoparticles Exhibiting Photothermal Properties
Published on: January 8, 2016
Heterocyclic Synthesis Using Magnetic Bromine and Iodine Nanoparticles
Ghada Al Assi1, Radwan Ali2, Mosstafa Kazemi3
1Department of Medical Laboratory Sciences, Faculty of Allied Medical Sciences, Hourani Center for Applied Scientific Research, Al-Ahliyya Amman University, Amman, Jordan.
None:
The immobilization of halogens, specifically bromine and iodine, on magnetic nanoparticles (MNPs) offers a promising strategy for developing efficient, recyclable, and heterogeneous catalytic systems. This review comprehensively examines recent progress in the synthesis, functionalization, and catalytic applications of halogen-modified MNPs, emphasizing their roles in heterocyclic compound synthesis. Key immobilization strategies-including covalent attachment, electrostatic interactions, and in situ halogenation-are analyzed concerning their influence on catalyst stability, activity, and reusability. The review highlights various application domains, such as electrophilic cyclization, oxidative coupling, and multicomponent reactions, underscoring the advantages of magnetic separation for catalyst recovery. Additionally, characterization techniques pertinent to evaluating the structural integrity and catalytic performance of these nanocatalysts are discussed. Critical challenges, including halogen leaching, stability issues, and scale-up considerations, are addressed alongside potential mitigation strategies. Future perspectives focus on the development of more robust, sustainable, and environmentally friendly halogenated MNP catalysts. Furthermore, the influence of external magnetic fields on catalytic performance from 2013 to early 2025 is also explored, providing insights into magnetic field effects in nanocatalysis. This review aims to serve as a comprehensive resource for researchers in nanocatalysis and green chemistry endeavoring to design advanced catalytic systems with enhanced efficiency and sustainability.
Related Concept Videos
Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene
Halogenation of Alkenes
Consider the bromination of cyclopentene. Molecular bromine is polarized in the proximity of the π electrons of cyclopentene. An electrophilic bromine atom adds across the double bond, forming a cyclic bromonium ion intermediate.
Radical Substitution: Allylic Bromination
Electrophilic Aromatic Substitution: Chlorination and Bromination of Benzene
Radical Anti-Markovnikov Addition to Alkenes: Overview
α-Bromination of Carboxylic Acids: Hell–Volhard–Zelinski Reaction

