Monitoring Lead–Phosphorus Interactions Through 31P-NMR Used as a Sensor in Phosphine Functionalized Silica Gel Adsorbent
A triphenylphosphine-functionalized silica gel material, optimized for lead adsorption, was synthesized via a one-pot sol-gel reaction and characterized using FTIR and solid-state <sup>13</sup>C and <sup>29</sup>Si NMR and XPS spectroscopy. The interaction between lead cations and phosphine groups was evaluated using the <sup>31</sup>P NMR chemical shift tensor as a sensor. Two distinct types of phosphine groups, exhibiting different rotational mobility behaviors, were identified, with their ratio influenced by the presence of lead cations. These results suggest that the adsorption behavior of lead on this functionalized silica gel adsorbent can be directly evaluated by its lead-phosphorus interaction. This association was corroborated by the shifting of the binding energies of phosphorus functional groups after lead uptake in the XPS analysis.
Authors
- Ilya G. Shenderovich (ORCID: https://orcid.org/0000-0001-6713-9080)
- Ricardo Manríquez‐González (ORCID: https://orcid.org/0000-0002-6899-0149)
- Jessica Badillo-Camacho (ORCID: https://orcid.org/0000-0001-5403-1687)
- José A. Gutierréz-Ortega (ORCID: https://orcid.org/0000-0003-4471-2168)
- Y. Velázquez-Galván (ORCID: https://orcid.org/0000-0002-6783-1568)
Institutions
- Instituto Tecnológico y de Estudios Superiores de Occidente (MX)
- Universidad de Guadalajara (MX)
- University of Regensburg (DE)
Publication Details
- Journal
- Gels
- Published
- 2025-07-26
- DOI
- https://doi.org/10.3390/gels11080580
- Citations
- 2
- Primary Topic
- Chemical Synthesis and Characterization
- Type
- article
- Field-Weighted Citation Impact
- 1.99