A first report on the synthesis of a complex of unsubstituted 1,2,3-triazolo[1,5-a]pyridine formed in situ via oxidative N–N bond coupling: Structural, photoluminescent, and biological properties of a new Cu(II) complex and its use as a single-source precursor for Cu and CuO nanoparticles

Subramani Sathiyakumar, Pitchai Selvam, Jayaraman Radhika, Sudhadevi Antharjanam, Faruck Lukmanul Hakkim, Krishnan Srinivasan, Thathan Premkumar

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Abstract

New copper(II) complexes [Cu(Pytc)(Cl)2]·2H2O (1) and [Cu2(tzp)2(CH3COO)4] (2) (Pytc = tert-butyl 2-(pyridine-2yl-methylene)hydrazinecarboxylate; tzp = 1,2,3-triazolo[1,5-a]pyridine) were prepared and were characterized by elemental analysis, electron impact mass spectrometry, UV–visible spectroscopy, infrared spectroscopy, and photoluminescence studies. A single-crystal X-ray diffraction study of 2 revealed a paddle-wheel copper(II) acetate structure with tzp acting as a monodentate ligand coordinated axially. Pytc and the metal complexes showed emissive, antibacterial, and antifungal properties. Furthermore, 2 was demonstrated to be a solid-state single-source precursor to form Cu and CuO nanoparticles (NPs) under different atmospheric conditions. By transmission electron microscopy, the as-prepared nanoparticles were observed to be roughly spherical with average particle sizes of approximately 10–12 nm for Cu NPs and approximately 20–22 nm for CuO NPs. Furthermore, high crystallinity, high purity, and the single-phase nature of the as-prepared NPs were revealed by the powder X-ray diffraction pattern.

Original languageEnglish (US)
Article number109730
JournalJournal of Physics and Chemistry of Solids
Volume148
DOIs
StatePublished - Jan 2021

Bibliographical note

Funding Information:
This work was funded by DST- SERB , India, under the EMEQ Scheme (SB/164/2014). This work was supported by the Basic Research Program of the National Research Foundation of Korea (NRF-2017R1D1A1B03034147) funded by the Ministry of Education , Science, and Technology, Republic of Korea.

Funding Information:
This work was funded by DST-SERB, India, under the EMEQ Scheme (SB/164/2014). This work was supported by the Basic Research Program of the National Research Foundation of Korea (NRF-2017R1D1A1B03034147) funded by the Ministry of Education, Science, and Technology, Republic of Korea.

Publisher Copyright:
© 2020 Elsevier Ltd

Keywords

  • 1,2,3-Triazolo[1,5-a]pyridine
  • Copper(II) acetate
  • Nanoparticles
  • N–N bond formation
  • Paddle-wheel structure

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