Synthesis, characterization of Cu(II)/ Ni(II) complexes metal ions derived from flexible dicarboxylate ligand with 2,2’-bipyridine and their photodegradations applications.

Authors

  • FAYAZ AHMED KEERIO Institute of Chemistry University of Sindh, Jamshoro
  • AMBREEN SHAH Institute of Chemistry, University of Sindh Jamshoro
  • M. YOUNIS TALPUR Institute of Chemistry University of Sindh, Jamshoro

DOI:

https://doi.org/10.26692/surjss.v57i02.7297

Keywords:

Metal complexes, , synthesis,, FT-IR, , UV-Vis,, SEM,, photo- degradation reaction.

Abstract

Newly developed metal ligand (M-L) coordination complexes were synthesized by various methods for research and commercial uses, which shown significant improvement over time. A newer flexible, bipyridine-based Cu (II) and Ni (II) metal complexes formed from 2,2’-bipyridine-4,4’-dicarboxylic acid, using the metal-coupling reaction. The structure of the new M-L complexes was analyzed using various spectroscopic techniques, including FT-IR, UV/Vis, SEM, and EDS. The newly synthesized compound 2,2’-bipyridine-4,4’-dicarboxylic acid[(BPyCOOH)] showed weak to medium-intensity bands in the 1730 cm?¹ range, attributed to aromatic carboxylate stretching vibrations. These metal complexes were employed as photo-catalysts for the photo degradation of methylene blue in an aqueous solution. The photocatalytic experiments revealed that the Cu(II) complex exhibited the best photocatalytic performance than Ni(II) complex, degrading 88% of methylene blue (MB) at 26°C. The photo-degradation activity was observed under UV light and in darkness. The kinetics of the photo degradation of methylene blue were investigated with optimized parameters in the presence of nan catalysts. The rate constants (k) for the metal ions [(BPyCOO)Cu] and [(BPyCOO)Ni] were measured to be 0.0481 and 0.0212, respectively. These results indicate a pseudo-first-order reaction with a higher rate constant for [(BPyCOO)Cu] compared to [(BPyCOO)Ni].

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Published

2025-12-30

How to Cite

Fayaz Ahmed Keerio, Shah, A., & M. Younis Talpur. (2025). Synthesis, characterization of Cu(II)/ Ni(II) complexes metal ions derived from flexible dicarboxylate ligand with 2,2’-bipyridine and their photodegradations applications. Sindh University Research Journal - SURJ (Science Series), 57(02), 22–28. https://doi.org/10.26692/surjss.v57i02.7297