Abstract
Herein, bio-based alginates (Alg) containing metallic beads (Ce and Cu) were synthesized via an alginate cross-linking method, and their properties were studied using experimental techniques combined with theoretical simulations. Materials were characterized through Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and scanning electron microscope (SEM) images, to determine the cross-linking structural features, thermal stability, and surface morphology of alginates. Besides, density functional theory (DFT) methods were employed to calculate global reactivity parameters such as HOMO–LUMO gap energies (ΔEH-L), electronegativity (χ), hardness (η), and electrophilic and nucleophilic indicators, using both gas and aqueous media for the study of the complexation process. Among other features, characterization of the thermal properties showed that Alg@Ce and Alg@Cu alginate beads behave differently as a function of the temperature. This behavior was also predicted by the conformation energy differences between Alg@Ce and Alg@Cu, which were found out theoretically and explained with the combined study of the vibrational modes between the carboxylate group with either Ce or Cu. Overall, the reactivity of the Alg@Ce alginate bead was higher than that of the Alg@Cu counterpart, results could be used as a cornerstone to employed the materials here studied in a wide range of applications.
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Conceptualization: formulation and evolution of overarching research goals an aims: Mohammed Elhoudi, Rachid Oukhrib, Christian A. Celaya, Youness Abdellaoui, and Hicham Abou Oualid.
Data curation: produce data, including software code use: Mohammed Elhoudi, Rachid Oukhrib, Christian A. Celaya, Miguel Reina.
Investigation: performing the experiments: Youness Abdellaoui, Issam Barra, Younes Brahmi, Hassan Bourzi.
Formal analysis: analyze study data: Mohammed Elhoudi, Rachid Oukhrib, Christian A. Celaya, Youness Abdellaoui, Issam Barra, Younes Brahmi, Hassan Bourzi.
Project administration: management and coordination responsibility for the research activity planning and execution:Youness Abdellaoui, Hicham Abou Oualid.
Resources: provision of study materials, reagents, laboratory simples, instrumentation computing resources; other analysis tools: Christian A. Celaya, Youness Abdellaoui, Issam Barra, Younes Brahmi, Hassan Bourzi.
Software: implementation of the computer code and supporting algorithms: Mohammed Elhoudi, Rachid Oukhrib, Christian A. Celaya.
Supervision: oversight and leadership responsibility for the research activity planning and execution, including mentorship external to the core team: Youness Abdellaoui, Abdallah Albourine, Hicham Abou Oualid.
Validation: verification, whether as a part of the activity or separate, of the overall replication or reproductivity of results/experiments and other research outputs: Daniel G. Araiza, Youness Abdellaoui, Miguel Reina, Hicham Abou Oualid.
Visualization: preparation, creation and/or presentation of the published work, specifically visualization/data presentation: Mohammed Elhoudi, Rachid Oukhrib, Christian A. Celaya, Youness Abdellaoui, Hicham Abou Oualid.
Writing-original draft: preparation, creation and/or presentation of the published work, specifically writing the initial draft: Mohammed Elhoudi, Rachid Oukhrib, Christian A. Celaya, Daniel G. Araiza.
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Mohammed Elhoudi and Rachid Oukhrib contributed equally to this work.
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Elhoudi, M., Oukhrib, R., A. Celaya, C. et al. Comparison of green bio-based cerium/alginate vs. copper/alginate beads: a study of vibrational and thermal properties using experimental and theoretical methods. J Mol Model 28, 37 (2022). https://doi.org/10.1007/s00894-022-05028-8
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DOI: https://doi.org/10.1007/s00894-022-05028-8