Open Access Article
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Expression of concern: Recyclable mesalamine-functionalized magnetic nanoparticles (mesalamine/GPTMS@SiO2@Fe3O4) for tandem Knoevenagel–Michael cyclocondensation: grinding technique for the synthesis of biologically active 2-amino-4H-benzo[b]pyran derivatives
Mahdiyeh Partovia,
Sobhan Rezayatia,
Ali Ramazani*ab,
Yavar Ahmadic and
Hooman Taherkhania
aDepartment of Chemistry, Faculty of Science, University of Zanjan, Zanjan, 45371-38791, Iran. E-mail: aliramazani@znu.ac.ir; aliramazani@gmail.com
bDepartment of Biotechnology, Research Institute of Modern Biological Techniques (RIMBT), University of Zanjan, Zanjan, 45371-38791, Iran
cDepartment of Chemistry Education, Farhangian University, P. O. Box 14665-889, Tehran, Iran
First published on 10th March 2025
Abstract
Expression of concern for ‘Recyclable mesalamine-functionalized magnetic nanoparticles (mesalamine/GPTMS@SiO2@Fe3O4) for tandem Knoevenagel–Michael cyclocondensation: grinding technique for the synthesis of biologically active 2-amino-4H-benzo[b]pyran derivatives’ by Mahdiyeh Partovi et al., RSC Adv., 2023, 13, 33566–33587, https://doi.org/10.1039/D3RA06560J.
The Royal Society of Chemistry is publishing this expression of concern in order to alert readers that concerns have been raised regarding the reliability of the XRD data in Fig. 2.
The Royal Society of Chemistry has asked the affiliated institution to investigate this matter and establish whether the data provided by the authors provide an accurate representation of the experiments that were conducted and to confirm the integrity and reliability of the data provided.
An expression of concern will continue to be associated with the article until we receive conclusive evidence regarding the reliability of the reported data.
Laura Fisher
28th February 2025
Executive Editor, RSC Advances
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