Keywords
EDTA
Coordination Polymer
SEM
EDS
How to Cite
Abstract
The morphological and elemental characteristics of poly[ethylenediaminetetraacetato-aqua-disodium-nickel(II)] were investigated using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). SEM analysis revealed well-developed rod-like and prismatic crystals with smooth surfaces and distinct crystal facets, indicating high crystallinity and an ordered coordination framework. EDS confirmed the presence of carbon, nitrogen, oxygen, sodium, and nickel as the constituent elements of the coordination polymer. The elemental composition (49.86 wt.% C, 4.79 wt.% N, 33.01 wt.% O, 3.32 wt.% Na, and 9.02 wt.% Ni) agrees well with the proposed molecular structure. The characteristic nickel signals together with the absence of impurity peaks verify the successful incorporation of Ni(II) into the EDTA framework and demonstrate the high purity of the synthesized material. The obtained results confirm the successful formation of a homogeneous and highly crystalline nickel–EDTA coordination polymer.
References
1. Foreman, M. M., Alessio, M., Krylov, A. I., Johnson, M. A. (2023). Influence of transition metal electron configuration on the structure of metal-EDTA complexes. Journal of Physical Chemistry A, 127, 1135–1145. https://doi.org/10.1021/acs.jpca.2c07996
2. Ling, Z., Yuan, Q., Kong, X., Cheng, L., Zhang, H. (2026). Photoelectron spectroscopy and structural characterization of EDTA complexes (M = Ni, Cu, Zn). Journal of Chemical Physics, 164, 054310.
3. Chen, M., Ding, L., Zhu, S., Xiong, X., Yuan, X., Peng, Y. (2023). Decomplexation of Ni–EDTA enhanced by Fe(III) reduction in the Fenton reaction. Journal of Environmental Chemical Engineering, 11, 110611.
4. Ma, Y., Wang, H., Bai, M., Li, M., Xu, J., Xie, H., Li, X. (2025). Mechanistic insights into the removal of metal-EDTA complexes from water. Journal of Cleaner Production, 503, 145003.
5. González-Varela, D., Araiza, D. G., Díaz, G., Pfeiffer, H. (2022). LaNiO₃ perovskite synthesis through the EDTA–citrate complexing method and its application to CO oxidation. Catalysts, 12(1), 57.
6. Rabanal-Sanchez, J., Vega-Chacon, J. (2025). Synthesis and characterization of EDTA coordination compounds and DFT study of EDTA species. Computational and Theoretical Chemistry, 1253, 114955.
7. Pechinka, D., Martsynko, O. (2025). Synthesis and comprehensive study of heteronuclear Ge(IV)-Ni(II) complexes with ethylenediaminetetraacetic acid. Ukrainian Chemistry Journal, 91(2), 45–58.
8. Naresh, K., Sivasankar, B. N., Madhankumar, S. (2026). Structural elucidation and coordination chemistry of metal-EDTA complexes. Structural Chemistry, 37, 125–138.
This work is licensed under a Creative Commons Attribution 4.0 International License.
